540 results on '"Qixing Zhou"'
Search Results
2. Triclosan Reprograms Immunometabolism and Activates the Inflammasome in Human Macrophages
- Author
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Peng Yuan, Fengge Shen, Junqiang Zhang, Shaohu Ouyang, Yuming Chen, Wei Zou, and Qixing Zhou
- Subjects
Environmental Chemistry ,General Chemistry - Abstract
To gather enough energy to respond to harmful stimuli, most immune cells quickly shift their metabolic profile. This process of immunometabolism plays a critical role in the regulation of immune cell function. Triclosan, a synthetic antibacterial component present in a wide range of consumer items, has been shown to cause immunotoxicity in a number of organisms. However, it is unclear whether and how triclosan impacts immunometabolism. Here, human macrophages were used as model cells to explore the modulatory effect of triclosan on immunometabolism. Untargeted metabolomics using integrated liquid chromatography-mass spectrometry (LC-MS) and gas chromatography-mass spectrometry (GC-MS) revealed that triclosan changed the global metabolic profile of macrophages. Furthermore, Seahorse energy analysis and
- Published
- 2022
3. The Lung Microbiota Affects Pulmonary Inflammation and Oxidative Stress Induced by PM2.5 Exposure
- Author
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Simin Wang, Qixing Zhou, Yingze Tian, and Xiangang Hu
- Subjects
Environmental Chemistry ,General Chemistry - Published
- 2022
4. Mitigation Effects and Associated Mechanisms of Environmentally Relevant Thiols on the Phytotoxicity of Molybdenum Disulfide Nanosheets
- Author
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Wei Zou, Chenxu Zhao, Xingli Zhang, Caixia Jin, Kai Jiang, and Qixing Zhou
- Subjects
Molybdenum ,Environmental Chemistry ,Disulfides ,Sulfhydryl Compounds ,General Chemistry ,Nanostructures - Abstract
Thorough investigations of the environmental fate and risks are necessary for the safe application of engineered nanomaterials. Nevertheless, the current understanding of potential transformations of MoS
- Published
- 2022
5. The optimized Fenton-like activity of Fe single-atom sites by Fe atomic clusters–mediated electronic configuration modulation
- Author
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Fan Mo, Chunlin Song, Qixing Zhou, Wendan Xue, Shaohu Ouyang, Qi Wang, Zelin Hou, Shuting Wang, and Jianling Wang
- Subjects
Multidisciplinary - Abstract
The performance optimization of isolated atomically dispersed metal active sites is critical but challenging. Here, TiO 2 @Fe species-N-C catalysts with Fe atomic clusters (ACs) and satellite Fe-N 4 active sites were fabricated to initiate peroxymonosulfate (PMS) oxidation reaction. The AC-induced charge redistribution of single atoms (SAs) was verified, thus strengthening the interaction between SAs and PMS. In detail, the incorporation of ACs optimized the HSO 5 - oxidation and SO 5 ·− desorption steps, accelerating the reaction progress. As a result, the Vis/TiFeAS/PMS system rapidly eliminated 90.81% of 45 mg/L tetracycline (TC) in 10 min. The reaction process characterization suggested that PMS as an electron donor would transfer electron to Fe species in TiFeAS, generating 1 O 2 . Subsequently, the h VB + can induce the generation of electron-deficient Fe species, promoting the reaction circulation. This work provides a strategy to construct catalysts with multiple atom assembly–enabled composite active sites for high-efficiency PMS-based advanced oxidation processes (AOPs).
- Published
- 2023
6. Interfacial Engineering of CoN/Co 3 O 4 Heterostructured Hollow Nanoparticles Embedded in N‐Doped Carbon Nanowires as a Bifunctional Oxygen Electrocatalyst for Rechargeable Liquid and Flexible all‐Solid‐State Zn‐Air Batteries
- Author
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Qixing Zhou, Sike Zhang, Guangyao Zhou, Huan Pang, Mingyi Zhang, Lin Xu, Kang Sun, Yawen Tang, and Kai Huang
- Subjects
Biomaterials ,General Materials Science ,General Chemistry ,Biotechnology - Published
- 2023
7. Generating dual-active species by triple-atom sites through peroxymonosulfate activation for treating micropollutants in complex water
- Author
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Qixing Zhou, Chunlin Song, Pengfei Wang, Zhiyong Zhao, Yi Li, and Sihui Zhan
- Subjects
Multidisciplinary - Abstract
The peroxymonosulfate (PMS)-triggered radical and nonradical active species can synergistically guarantee selectively removing micropollutants in complex wastewater; however, realizing this on heterogeneous metal-based catalysts with single active sites remains challenging due to insufficient electron cycle. Herein, we design asymmetric Co–O–Bi triple-atom sites in Co-doped Bi 2 O 2 CO 3 to facilitate PMS oxidation and reduction simultaneously by enhancing the electron transfer between the active sites. We propose that the asymmetric Co–O–Bi sites result in an electron density increase in the Bi sites and decrease in the Co sites, thereby PMS undergoes a reduction reaction to generate SO 4 •- and •OH at the Bi site and an oxidation reaction to generate 1 O 2 at the Co site. We suggest that the synergistic effect of SO 4 •- , •OH, and 1 O 2 enables efficient removal and mineralization of micropollutants without interference from organic and inorganic compounds under the environmental background. As a result, the Co-doped Bi 2 O 2 CO 3 achieves almost 99.3% sulfamethoxazole degradation in 3 min with a k-value as high as 82.95 min −1 M −1 , which is superior to the existing catalysts reported so far. This work provides a structural regulation of the active sites approach to control the catalytic function, which will guide the rational design of Fenton-like catalysts.
- Published
- 2023
8. Pathogenicity, anastomosis groups, host range, and genetic diversity of Rhizoctonia species isolated from soybean, pea, and other crops in Alberta and Manitoba, Canada
- Author
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Robert L. Conner, Sheau-Fang Hwang, Andrew Ho, Kan-Fa Chang, Michael W. Harding, Qixing Zhou, Haitian Yu, Yuhua He, and Stephen E. Strelkov
- Subjects
Genetic diversity ,biology ,food and beverages ,Plant Science ,Horticulture ,Rhizoctonia ,biology.organism_classification ,Pathogenicity ,Pisum ,Field pea ,Sativum ,Glycine ,Root rot ,Agronomy and Crop Science - Abstract
Root rot is a common disease in soybean (Glycine max) and field pea (Pisum sativum), which restrain increased production in Canada. Sixty-seven isolates of Rhizoctonia were recovered from various diseased plants in Alberta, Canada along with three isolates from diseased soybean plants in Manitoba, Canada. According to their anastomosis behavior, 23 (32.9%) of the isolates were identified as anastomosis group (AG) 4 (AG4), 7 (10.0%) were AG2-1, 10 (14.3%) were AG2-2, 7 (10.0%) were AG5, 3 (4.3%) were AG-E and the AGs of the remaining 20 (28.6%) isolates could not be determined. Isolates belonging to AG4 produced typical symptoms of stem rot and root rot on seedlings of soybean and pea and were more aggressive than the AG2-1, AG2-2, AG5 and AG-E isolates. Selected isolates of AG4, AG2-1, AG2-2, AG5 and AG-E were to some degree able to infect common crops in Alberta, which included barley, canola, corn, faba bean, flax, lupin, lentil, pea, potato, soybean, and wheat. The genetic variability among these isolates was evaluated using phylogenetic analysis based on the rDNA ITS sequences and inter-simple sequence repeat (ISSR) markers. For the ITS sequence analysis, a neighbour-joining tree was constructed using the PAUP program, which clustered the Rhizoctonia isolates into five groups (Groups I to V). However, no correlation was observed between AGs, locations, aggressiveness or host origins. For the ISSR analysis, 54 polymorphic ISSR patterns were identified, indicating a high level of diversity among the isolates.
- Published
- 2022
9. Recent advances in improving the remediation performance of microbial electrochemical systems for contaminated soil and sediments
- Author
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Ruixiang Li, Jinning Wang, Tian Li, and Qixing Zhou
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Environmental Engineering ,Pollution ,Waste Management and Disposal ,Water Science and Technology - Published
- 2022
10. Synthesis, characterization, safety design, and application of NPs@BC for contaminated soil remediation and sustainable agriculture
- Author
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Tong Zheng, Shaohu Ouyang, and Qixing Zhou
- Subjects
Biomaterials ,Soil Science ,Environmental Science (miscellaneous) ,Pollution - Abstract
Biochar (BC) and nanoparticle-decorated biochar (NPs@BC) have emerged as potential high-performance function materials to facilitate simultaneous soil remediation and agricultural production. Therefore, there is an urgent need to incorporate environmental sustainability and human health targets into BC and NPs@BC selection and design processes. In contrast to extensive research on the preparation, modification, and environmental application of BC to soil ecosystems, reports about the adapted framework and material selection strategy of NPs@BC under environmental and human health considerations are still limited. Nevertheless, few studies systematically explored the impact of NPs@BC on soil ecosystems, including soil biota, geochemical properties, and nutrient cycles, which are critical for large-scale utilization as a multifunctional product. The main objective of this systematic literature review is to show the high degrees of contaminant removal for different heavy metals and organic pollutants, and to quantify the economic, environmental, and toxicological outcomes of NPs@BC in the context of sustainable agriculture. To address this need, in this review, we summarized synthesis techniques and characterization, and highlighted a linkage between the evolution of NPs@BC properties with the framework for sustainable NPs@BC selection and design based on environmental effects, hazards, and economic considerations. Then, research advances in contaminant remediation for heavy metals and organic pollutants of NPs@BC are minutely discussed. Eventually, NPs@BC positively acts on sustainable agriculture, which is declared. In the meantime, evaluating from the perspective of plant growth, soil characterizations as well as carbon and nitrogen cycle was conducted, which is critical for comprehending the NPs@BC environmental sustainability. Our work may develop a potential framework that can inform decision-making for the use of NPs@BC to facilitate promising environmental applications and prevent unintended consequences, and is expected to guide and boost the development of highly efficient NPs@BC for sustainable agriculture and environmental applications. Graphical Abstract
- Published
- 2023
11. Magnetic Field-Guided MoS2/WS2 Heterolayered Nanofilm Regulates Cell Behavior and Gene Expression
- Author
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Shan Sun, Dandan Li, Shuqing Guo, Xuan Hou, Xiangang Hu, Qixing Zhou, and Jiwei Luo
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medicine.anatomical_structure ,Materials science ,Gene expression ,Cell ,medicine ,General Materials Science ,Magnetic field ,Cell biology - Published
- 2021
12. Sustainable biochar as an electrocatalysts for the oxygen reduction reaction in microbial fuel cells
- Author
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Shengnan Li, Tao Hua, Fengxiang Li, Jingchun Tang, Shih-Hsin Ho, and Qixing Zhou
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Microbial fuel cell ,Ecology ,Renewable Energy, Sustainability and the Environment ,Chemistry ,Microbial fuel cells ,Low activity ,TJ807-830 ,Electrocatalysts ,02 engineering and technology ,Limiting ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrocatalyst ,01 natural sciences ,Renewable energy sources ,Oxygen reduction reaction ,0104 chemical sciences ,Biochar ,Biochemical engineering ,0210 nano-technology ,Pyrolysis ,QH540-549.5 - Abstract
Microbial fuel cells (MFCs) have gained remarkable attention as a novel wastewater treatment that simultaneously generates electricity. The low activity of the oxygen reduction reaction (ORR) remains one of the most critical bottlenecks limiting the development of MFCs. To date, although research on biochar as an electrocatalyst in MFCs has made tremendous progress, further improvements are needed to make it economically practical. Recently, biochars have been considered to be ORR electrocatalysts with developmental potential. In this review, the ORR mechanism and the essential requirements of ORR catalysts in MFC applications are introduced. Moreover, the focus is to highlight the material selection, properties, and preparation of biochar electrocatalysts, as well as the evaluation and measurement of biochar electrodes. Additionally, in order to provide comprehensive information on the specific applications of biochars in the field of MFCs, their applications as electrocatalysts, are then discussed in detail, including the uses of nitrogen-doped biochar and other heteroatom-doped biochars as electrocatalysts, poisoning tests for biochar catalysts, and the cost estimation of biochar catalysts. Finally, profound insights into the current challenges and clear directions for future perspectives and research are concluded.
- Published
- 2021
13. Plasmodiophora brassicae in Its Environment: Effects of Temperature and Light on Resting Spore Survival in Soil
- Author
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Kher Zahr, David Feindel, Yalong Yang, H. U. Ahmed, Michael W. Harding, Jie Feng, Alian Sarkes, and Qixing Zhou
- Subjects
0106 biological sciences ,0301 basic medicine ,food.ingredient ,Resting spore ,fungi ,Plant Science ,Biology ,Plasmodiophora brassicae ,medicine.disease ,Pathogenicity ,01 natural sciences ,Spore ,Clubroot ,03 medical and health sciences ,Horticulture ,030104 developmental biology ,food ,medicine ,Canola ,Agronomy and Crop Science ,010606 plant biology & botany - Abstract
Clubroot caused by Plasmodiophora brassicae is an important disease on cruciferous crops worldwide. Management of clubroot is challenging, largely because of the millions of resting spores produced within an infected root that can survive dormant in the soil for many years. This study was conducted to investigate some of the environmental conditions that may affect the survival of resting spores in the soil. Soil samples containing clubroot resting spores (1 × 107 spores/g soil) were stored at various temperatures for 2 years. Additionally, other samples were buried in soil or kept on the soil surface in the field. The content of P. brassicae DNA and the numbers of viable spores in the samples were assessed by quantitative PCR (qPCR) and pathogenicity bioassays, respectively. The results indicated that 4°C, 20°C, and being buried in the soil were more conductive conditions for spore survival than −20°C, 30°C, and at the soil surface. Most (99.99%) of the spores kept on the soil surface were nonviable, suggesting a negative effect of light on spore viability. Additional experiments confirmed the negative effect of ultraviolet light on spore viability because spores receiving 2 and 3 h ultraviolet light exhibited lower disease potential and contained less DNA content than the nontreated control. Finally, this work confirmed that DNA-based quantification methods such as qPCR can be poor predictors of P. brassicae disease potential because of the presence and persistence of DNA from dead spores.
- Published
- 2021
14. Reactive template‐derived interfacial engineering of CoP/CoO heterostructured porous nanotubes towards superior electrocatalytic hydrogen evolution
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Qixing Zhou, Ruoxu Sun, Yiping Ren, Run Tian, Jun Yang, Huan Pang, Kai Huang, Xinlong Tian, Lin Xu, and Yawen Tang
- Subjects
Renewable Energy, Sustainability and the Environment ,Materials Science (miscellaneous) ,Materials Chemistry ,Energy (miscellaneous) - Published
- 2022
15. The Lung Microbiota Affects Pulmonary Inflammation and Oxidative Stress Induced by PM
- Author
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Simin, Wang, Qixing, Zhou, Yingze, Tian, and Xiangang, Hu
- Subjects
Inflammation ,Mice ,Oxidative Stress ,Microbiota ,RNA, Ribosomal, 16S ,Animals ,Particulate Matter ,Pneumonia ,Lung ,Biomarkers ,Anti-Bacterial Agents - Abstract
Fine particulate matter (PM
- Published
- 2022
16. Innovative Cost-Effective Nano-NiCo
- Author
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Qixing, Zhou, Ruixiang, Li, Xiaolin, Zhang, and Tian, Li
- Subjects
Oxygen ,Bioelectric Energy Sources ,Cost-Benefit Analysis ,Wastewater ,Electrodes - Abstract
Microbial electrochemical systems (MESs) can harvest bioelectricity from varieties of organic matter in wastewater through electroactive microorganisms. Oxygen reduction reaction (ORR) in a cathode plays an important role in guaranteeing high power generation, which can be enhanced by cathode catalysts. Herein, the tiny crystalline grain nanocrystal NiCo
- Published
- 2022
17. Gram-scale synthesis and unraveling the activity origin of atomically dispersed Co-N4O sites toward superior electrocatalytic oxygen reduction
- Author
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Sike Zhang, Qixing Zhou, Linya Fang, Rui Wang, Tingyu Lu, Qun Zhao, Xuefang Gu, Shu Tian, Lin Xu, Huan Pang, Jun Yang, Yawen Tang, and Shuhui Sun
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Process Chemistry and Technology ,Catalysis ,General Environmental Science - Published
- 2023
18. Effect of natural soil nanocolloids on the fate and toxicity of cadmium to rice (Oryza sativa L.) roots
- Author
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Shaohu Ouyang, Qixing Zhou, Zhicheng Bi, Jing Sun, and Xiangang Hu
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Environmental Engineering ,Environmental Chemistry ,Pollution ,Waste Management and Disposal - Published
- 2023
19. Bioavailability and toxicity variation of benzo(a)pyrene in three soil–wheat systems: Indicators of soil quality
- Author
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Qixing Zhou and Yong Teng
- Subjects
Environmental remediation ,food and beverages ,Soil Science ,Soil classification ,Development ,complex mixtures ,Soil quality ,Soil contamination ,Bioavailability ,chemistry.chemical_compound ,Benzo(a)pyrene ,chemistry ,Bioaccumulation ,Environmental chemistry ,Soil water ,Environmental Chemistry ,General Environmental Science - Abstract
Benzo[a]pyrene (B[a]P) as a representative polycyclic aromatic hydrocarbons is concerned by global scientists in various fields, but its biological and biochemical actions in soil-wheat systems are still rarely reported. The B[a]P as a ubiquitous soil pollutant possesses varied contents in real environment, and herein was studied in systems of soil and wheat to obtain relative results to reveal their variations in different systems. Its bioavailability (extractability and bioaccumulation) and basic biological toxicity were tested based on three typical soil types (red, black, and brown) in China and spiked amounts (0.1, 1, and 10 mg/kg) with several orders of magnitude. Results showed that B[a]P concentrations in soil-wheat systems extracted by HPCD were insignificantly (p > 0.05) higher than Tenax-TA, and varied with soil types and spiked concentrations. Besides, the root and shoot length were mostly inhibited, in a range of -21.85%-26.35% and -0.48%-54.85%, respectively, by B[a]P in different soil types and increased with its increasing concentration. Comparatively, higher bioconcentration factor and translocation factor values were observed under lower group in red soil-wheat systems, and higher spiked groups in black and brown soil-wheat systems. Moreover, inhibitive effects posed by B[a]P were mainly targeted at wheat shoots in these soils. The simultaneous studies provided a comparable knowledge of B[a]P in ecosystems of different soil types combined with different plant species due to lots of variations, further to serve for contaminated soil remediation and sustainable agricultural management.
- Published
- 2021
20. Integrating FTIR 2D correlation analyses, regular and omics analyses studies on the interaction and algal toxicity mechanisms between graphene oxide and cadmium
- Author
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Kangying Wu, Yuhao Li, Qixing Zhou, Xiangang Hu, and Shaohu Ouyang
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Environmental Engineering ,Health, Toxicology and Mutagenesis ,Spectroscopy, Fourier Transform Infrared ,Environmental Chemistry ,Graphite ,Chlorella vulgaris ,Pollution ,Waste Management and Disposal ,Ecosystem ,Cadmium - Abstract
Graphene oxide (GO, a popular 2D graphene-based nanomaterial) has developed quickly and has received considerable attention for its applications in environmental protection and pollutant removal. However, significant knowledge gaps still exist about the interaction characteristic and joint toxicity mechanism of GO and cadmium (Cd) on aquatic organisms. In this study, GO showed a high adsorption capacity (120. 6 mg/g) and strong adsorption affinity (K
- Published
- 2022
21. Metal–Organic Frameworks for Ion Conduction
- Author
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Wendan Xue, Christopher D. Sewell, Qixing Zhou, and Zhiqun Lin
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General Medicine ,General Chemistry ,Catalysis - Abstract
Solid-state ionic conductors are compelling alternatives to liquid electrolytes in clean energy-harvesting and -storage technologies. The development of novel ionic conducting materials is one of the most critical challenges for next-generation energy technologies. Several advancements in design strategies, synthetic approaches, conducting properties, and underlying mechanisms for ionic conducting metal-organic frameworks (MOFs) have been made over the past five years; however, despite the recent, considerable expansion of related research fields, there remains a lack of systematic overviews. Here, an extensive introduction to ionic conducting performance for MOFs with different design strategies is provided, focusing primarily on ion mobility with the aid of hydrogen-bonding networks or solvated ionic charge. Furthermore, current theories on ion conducting mechanisms in different regimes are comprehensively summarized to provide an understanding of the underlying working principles in complex, realistic systems. Finally, challenges and future research directions at the forefront of ionic conducting MOF technologies are outlined.
- Published
- 2022
22. Regulation of rhizospheric microbial network to enhance plant growth and resist pollutants: Unignorable weak electric field
- Author
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Xiaolin Zhang, Jintong Song, Wenqing Yan, Tian Li, Ruixiang Li, Jinning Wang, Xin Wang, and Qixing Zhou
- Subjects
Environmental Engineering ,Bacteria ,Plant Development ,Plants ,Pollution ,Plant Roots ,Hydrocarbons ,Biodegradation, Environmental ,Rhizosphere ,Endophytes ,Environmental Chemistry ,Soil Pollutants ,Environmental Pollutants ,Waste Management and Disposal ,Soil Microbiology - Abstract
The union of Plant Growth-Promoting Bacteria (PGPB) and rhizosphere confers a series of functions beneficial to plant. However, the lack of an opearable in situ method limits the further understanding on the mechanism. In this study, a weak electric field was designed to regulate rhizospheric microflora in a constructed root-splitting reactor. Compared with the control, the aboveground and underground biomass of rice seedling increased by 17 % and 18 % (p0.05) respectively under the exist of weak electric field of 0.14 V/cm. The joint action of rhizosphere and PGPB displayed the detoxification ability in the condition of soluble petroleum hydrocarbons, where the height, stem diameter, biomass and root vigor of the plant was increased by 58 %, 32 %, 43 % and 48 % respectively than the control. The selective reproduction of endophytes and ectophytes (denitrifying, auxin-producing, hydrocarbon-degrading and electroactive bacteria) was observed under applied weak electric field, which enhanced the nitrogen utilization, cellular metabolic activity and resistance to toxic organics of plant. This was further confirmed by the up-regulated OTUs related to the hydrocarbon degradation function, tryptophan metabolism and metabolism of nicotinate and nicotinamide. Moreover, the weak electric field also enhanced the transfer ability of partial endophytes grown in the root to improve plant stress resistance. The results in this work inspired an exercisable method for in situ enrichment of PGPB in the rhizosphere to cope with food crisis and provided a new way to deal with sudden environmental events.
- Published
- 2022
23. Phylogenetic, phenotypic and host range characterization of five Fusarium species isolated from chickpea in Alberta, Canada
- Author
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Michael W. Harding, Qixing Zhou, Chris Jones, Jie Feng, Yingli Wang, David Feindel, and Yalong Yang
- Subjects
0106 biological sciences ,Fusarium ,Phylogenetic tree ,Alberta canada ,Plant Science ,Biology ,biology.organism_classification ,01 natural sciences ,Phenotype ,Botany ,Root rot ,Agronomy and Crop Science ,Legume ,010606 plant biology & botany - Abstract
Chickpea (Cicer arietinum L.) is an important food legume worldwide, providing a source of high-quality protein. Fifteen chickpea samples showing leaf yellowing and root rot were obtained from sout...
- Published
- 2021
24. The application and progress of bioelectrochemical systems (BESs) in soil remediation: A review
- Author
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Tian Li, Qixing Zhou, and Ruixiang Li
- Subjects
Pollutant ,Microbial fuel cell ,Waste management ,Renewable Energy, Sustainability and the Environment ,Environmental remediation ,02 engineering and technology ,Human decontamination ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Soil remediation ,01 natural sciences ,Soil contamination ,Environmentally friendly ,0104 chemical sciences ,Wastewater ,Environmental science ,0210 nano-technology - Abstract
Soil pollution endangers human health and ecological balance, which is why finding a highly efficient way to deal with pollutants is necessary. Biological method is an environmentally friendly treatment method. Bioelectrochemical systems (BESs), which combine electrochemistry with biological methods, have been widely used to remediate polluted environments, including wastewater, sludge, sediment, and soil. In BESs, redox reactions occur on electrodes with electroactive bacteria, which convert pollutants into low-polluting or nonpolluting substances. With BESs being a promising technology in the remediation field, the decontamination mechanisms and applications in soil conducted by BESs have attracted much attention. Therefore, to better understand the research progress of BESs, this paper mainly summarizes the mechanism of different classified BESs. The applications of microbial fuel cells (MFCs) in four pollutants (petroleum, heavy metals, pesticides, antibiotics) and the possible applications of microbial electrolysis cells (MECs) in soil are discussed. The main problems in BESs and possible future development directions are also evaluated.
- Published
- 2021
25. Natural nanocolloids regulate the fate and phytotoxicity of hematite particles in water
- Author
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Shaohu Ouyang, Qixing Zhou, Peng Yuan, Yang Gao, Jing Sun, Wei Zou, and Xiangang Hu
- Subjects
Environmental Engineering ,Ecological Modeling ,Pollution ,Waste Management and Disposal ,Water Science and Technology ,Civil and Structural Engineering - Published
- 2023
26. Improving the uptake of PAHs by the ornamental plant Sedum spectabile using nano-SiO2 and nano-CeO2
- Author
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jianv liu, Yaping Wang, Mingzhu Wang, Rongrong Liu, Xiaoting Feng, Zijin Xue, and Qixing Zhou
- Subjects
History ,Environmental Engineering ,Polymers and Plastics ,Environmental Chemistry ,Business and International Management ,Pollution ,Waste Management and Disposal ,Industrial and Manufacturing Engineering - Published
- 2023
27. Energy efficient portable air cathode electrochlorinator for point-of-use disinfection of toilet wastewater
- Author
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Zhihui Ma, Haitao Wang, Qixing Zhou, Bolong Liang, Mingmei Li, Pengfei Wang, and Sihui Zhan
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Environmental Engineering ,Health, Toxicology and Mutagenesis ,Environmental Chemistry ,Pollution ,Waste Management and Disposal - Published
- 2023
28. Enhanced carbon emission driven by the interaction between functional microbial community and hydrocarbons: An enlightenment for carbon cycle
- Author
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Zelin Hou, Qixing Zhou, Fan Mo, Weilu Kang, and Shaohu Ouyang
- Subjects
Environmental Engineering ,Environmental Chemistry ,Pollution ,Waste Management and Disposal - Published
- 2023
29. Effects of co-modified biochar immobilized laccase on remediation and bacterial community of PAHs-contaminated soil
- Author
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Zeqi Zheng, Weitao Liu, Qixing Zhou, Jiantao Li, Aurang Zeb, Qi Wang, Yuhang Lian, Ruiying Shi, and Jianlin Wang
- Subjects
Soil ,Environmental Engineering ,Bacteria ,Steel ,Health, Toxicology and Mutagenesis ,Laccase ,Environmental Chemistry ,Polycyclic Aromatic Hydrocarbons ,Pollution ,Waste Management and Disposal - Abstract
Considering the stability and economy of immobilized enzymes, this study prepared co-modified biochar immobilized laccase product named Fe
- Published
- 2023
30. Nanocolloids, but Not Humic Acids, Augment the Phytotoxicity of Single-Layer Molybdenum Disulfide Nanosheets
- Author
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Hui Zeng, Xiangang Hu, Shaohu Ouyang, and Qixing Zhou
- Subjects
Molybdenum ,chemistry.chemical_classification ,Reactive oxygen species ,media_common.quotation_subject ,Chlorella vulgaris ,General Chemistry ,010501 environmental sciences ,01 natural sciences ,Nanostructures ,chemistry.chemical_compound ,chemistry ,Environmental chemistry ,Environmental Chemistry ,Humic acid ,Phytotoxicity ,Disulfides ,Ecotoxicity ,Internalization ,Molybdenum disulfide ,Humic Substances ,Single layer ,0105 earth and related environmental sciences ,media_common - Abstract
Engineered nanomaterials (ENMs), especially transition metal dichalcogenide (TMDC), have received great attention in recent years due to their advantageous properties and applications in various fields and are inevitably released into the environment during their life cycle. However, the effect of natural nanocolloids, widely distributed in the aquatic environment, on the environmental transformation and ecotoxicity of ENMs remains largely unknown. In this study, the effects of natural nanocolloids were compared to humic acid on the environmental transformation and ecotoxicity of single-layer molybdenum disulfide (SLMoS2), a representative TMDC. SLMoS2 with nanocolloids or humic acid (HA) enhanced their dispersion and Mo ion release in deionized water. Nanocolloids induced growth inhibition, reactive oxygen species (ROS) elevation, and cell permeability. Low-toxicity SLMoS2 combined with nanocolloids will enhance the above adverse effects. SLMoS2-nanocolloids induced serious damage (cell distortion and deformation), SLMoS2 internalization, and metabolic perturbation on Chlorella vulgaris (C. vulgaris). In contrast, the addition of HA induced the growth promotion and lower ROS level, inhibited the internalization of SLMoS2, and mitigated metabolic perturbation on C. vulgaris. This work provides insights into the effect of natural nanocolloids on the behaviors and biological risks of ENMs in aquatic environments, deserving substantial future attention.
- Published
- 2021
31. Synthesis of ppy–MgO–CNT nanocomposites for multifunctional applications
- Author
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Xin Wang, K. Bharathi Yazhini, Brim Ondon Stevy, and Qixing Zhou
- Subjects
Nanotube ,Nanocomposite ,Materials science ,Textile ,business.industry ,General Chemical Engineering ,Composite number ,Sodium hypophosphite ,General Chemistry ,chemistry.chemical_compound ,chemistry ,Polymerization ,Chemical engineering ,Char ,business ,Fire retardant - Abstract
Cotton is one of the most important raw materials for textile and clothing production. The main drawbacks of cotton fibers are their poor mechanical properties and high flammability. Compared with some synthetic polymer fibers, cotton fabrics treated with modern flame-retardant and reinforcement finishes often cannot meet rigid military specifications. Polypyrrole–magnesium oxide (ppy–MgO) and polypyrrole–magnesium oxide–carbon nanotube (ppy–MgO–CNT) composites were prepared with various weight ratios by in situ chemical polymerization method. 1,2,3,4-Butane tetracarboxylic acid (BTCA) was used as a cross-linking agent in the presence of sodium hypophosphite (SHP). The composite sol was coated on cotton fabric using the pad-dry-cure technique. The coated cotton fabrics were characterized by SEM, EDAX, XRD, UV-DRS and FT-IR analysis, and tested for flame retardant and UPF application. The flame-retardant study showed a maximum char length of 0.3 cm and the char yield was about 49% for the ppy–MgO–CNT composite. For that UPF application, a 30 UPF value was shown for the ppy–MgO–CNT composite. In the case of the antibacterial study, the zone of inhibition was observed for all of the test samples against MRSA and PAO1 bacteria. The zone of inhibition showed as 4.0, 3.0 mm for the ppy–MgO–CNT composite. Hence, the ppy–MgO–CNT composite was found to be efficient.
- Published
- 2021
32. Formation of S defects in MoS2-coated wood for high-efficiency seawater desalination
- Author
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Xiangang Hu, Lei Zhang, Qixing Zhou, and He Xuan
- Subjects
Materials science ,business.industry ,Materials Science (miscellaneous) ,Energy conversion efficiency ,Evaporation ,Portable water purification ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Solar energy ,01 natural sciences ,0104 chemical sciences ,Adsorption ,Flux (metallurgy) ,Chemical engineering ,Thermal ,0210 nano-technology ,business ,Mesoporous material ,General Environmental Science - Abstract
Solar steam generation has attracted interest in water purification and seawater desalination as an efficient solar energy conversion method. However, the complex preparation process and limited efficiency restrict the practical applications of solar-generated steam. Here, we report a three-dimensional wood membrane inside coated with MoS2 (WM-H, with S defects) for efficient seawater desalination. The vertically aligned mesoporous wood channels and their inner microstructures increase the contact interface between water and MoS2 in wood. The formation of S defects allows the surface temperature of the membrane to reach ∼53 °C under 1 sun illumination. The MoS2-coated wood with S defects exhibited an excellent evaporation flux (1.46 kg m−2 h−1, one sun), with a solar thermal conversion efficiency of 82.5%. The adsorption peak values of Na+ on the two sides of MoS2 with defects are 2.17 times and 1.49 times higher than those of MoS2 without defects. The wood-based design provides an inexpensive way to capture solar energy and generate steam.
- Published
- 2021
33. Potential use of <scp> Impatiens balsamina </scp> L. for bioremediation of lead and polychlorinated biphenyl contaminated soils
- Author
-
Qixing Zhou, Weitao Liu, Yuebing Sun, Xue Zhang, Jiani Wu, Jiapan Lian, and Aurang Zeb
- Subjects
Contaminated soils ,biology ,Soil Science ,Polychlorinated biphenyl ,Development ,biology.organism_classification ,Phytoremediation ,chemistry.chemical_compound ,Lead (geology) ,Bioremediation ,chemistry ,Environmental chemistry ,Environmental Chemistry ,Environmental science ,Impatiens ,General Environmental Science - Published
- 2020
34. Cadmium adsorption to clay-microbe aggregates: Implications for marine heavy metals cycling
- Author
-
Kurt O. Konhauser, Yuxia Liu, Hua-Zhang Zhao, Tian Li, Qixing Zhou, Weitao Liu, and Daniel S. Alessi
- Subjects
inorganic chemicals ,Cadmium ,Mineral ,010504 meteorology & atmospheric sciences ,biology ,chemistry.chemical_element ,engineering.material ,010502 geochemistry & geophysics ,Synechococcus ,biology.organism_classification ,complex mixtures ,01 natural sciences ,chemistry.chemical_compound ,Adsorption ,Montmorillonite ,chemistry ,13. Climate action ,Geochemistry and Petrology ,Environmental chemistry ,Illite ,engineering ,Kaolinite ,Clay minerals ,0105 earth and related environmental sciences - Abstract
Interactions between microorganisms and clay minerals influence the transport and cycling of metal contaminants in both marine and terrestrial environments. The present study was conducted to quantify the adsorption of dissolved cadmium, Cd(II), under seawater-like conditions to the marine cyanobacterium Synechococcus sp. PCC 7002, three common clay minerals (kaolinite, montmorillonite and illite), as well as cell-clay aggregates. We show here that the Synechococcus-only experiments removed the most Cd above pH 5.5, followed in decreasing order by aggregates of 50% cells:50% individual clays, aggregates of cells and all 3 clays, and individual clays. Electron microscope imaging showed that clays associated in a tangential edge-on orientation to the cells in Synechococcus-clay mineral aggregates. A non-electrostatic surface complexation modeling approach was used to fit Cd adsorption onto Synechococcus cells and individual clay minerals. The resulting Cd binding constants were then used in consort with surface functional group pKa values and site concentrations to accurately predict the extent of Cd adsorption onto the Synechococcus-clay mineral aggregates using the component additivity (CA) approach. We observed that the addition of cyanobacterial cells to clay mineral suspensions led to significantly larger mean aggregate sizes of clay minerals, enhancing the clay sedimentation rate. Although specifically focused on Cd, our study indicates that the ratio of bacterial plankton to clay minerals is an important determinant in terms of understanding the rate with which metals are transferred from the water column to the seafloor.
- Published
- 2020
35. Lake Chemodiversity Driven by Natural and Anthropogenic Factors
- Author
-
Jiwei Luo, Qixing Zhou, Xiangang Hu, Hui Zeng, Peng Deng, Chen He, and Quan Shi
- Subjects
Lakes ,Anthropogenic Effects ,Environmental Chemistry ,Humans ,Human Activities ,General Chemistry ,Dissolved Organic Matter ,Mass Spectrometry - Abstract
As extremely active sites processing terrestrially derived dissolved organic matter (DOM), lakes deserve sufficient attention. Because of high-complexity interactions between DOM and the surrounding environment, the natural and anthropogenic drivers controlling the composition and chemodiversity of DOM molecules in lakes remain unclear. Here, 13,952 DOM molecules were identified and assessed in 45 lakes across China via ultrahigh-resolution mass spectrometry. Furthermore, the effects of both natural and anthropogenic factors on the DOM composition, DOM chemodiversity, and greenhouse gas emissions were investigated. The majority of the variations in DOM chemical composition could be attributed to the differences in the hydrology and nutrient concentrations of the lakes, and human activities also played a role, mainly through atmospheric pollution. Environmental factors mainly influenced DOM chemodiversity in the form of S-containing compounds. N-containing compounds exhibited a positive correlation with CO
- Published
- 2022
36. Effect of graphitic carbon nitride powders on adsorption removal of antibiotic resistance genes from water
- Author
-
Zhiruo Zhou, Qixing Zhou, Pengfei Wang, Xueyue Mi, Haiyin Zhan, and Yutong Wang
- Subjects
Graphitic carbon nitride ,Langmuir adsorption model ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,law.invention ,symbols.namesake ,chemistry.chemical_compound ,Adsorption ,Isoelectric point ,Chemical engineering ,Adsorption kinetics ,Polymerization ,chemistry ,law ,symbols ,0210 nano-technology ,Filtration ,Antibiotic resistance genes - Abstract
There is a growing need to eliminate antibiotic resistance genes (ARGs) in the environment and mitigate widespread antibiotic resistance. Graphitic carbon nitride (g-C3N4) was successfully synthesized via facile thermal polymerization approach and its potential for adsorption treatment of ARGs in water was examined. Batch adsorption experimental results revealed that g-C3N4 powders had robust adsorption activity for the gene ampC and ermB. Adsorption kinetics and isotherms were systematically investigated to explain the adsorption mechanism. The apparent adsorption equilibrium could be reached within 180 min. The adsorption process effectively removed ARGs (ampC and ermB) from water with 3.2 log and 4.2 log reductions, respectively. In addition, experimental data were analyzed by several models and simulated well with Langmuir isotherm and pseudo-second-order model. It indicated that adsorption process might be dominated by the chemical rate-limiting step. Moreover, the effects of temperature and pH on the removal of ARGs were conducted and the isoelectric point (IEP) was obtained. Finally, we have demonstrated that the g-C3N4 is a novel adsorbent and can be used as column packing to remove ARGs by filtration.
- Published
- 2020
37. The nanomaterial-induced bystander effects reprogrammed macrophage immune function and metabolic profile
- Author
-
Xiangang Hu, Peng Yuan, and Qixing Zhou
- Subjects
Cell Survival ,Surface Properties ,THP-1 Cells ,Cell ,Biomedical Engineering ,Macrophage polarization ,02 engineering and technology ,Sulfides ,010501 environmental sciences ,Nitric Oxide ,Toxicology ,01 natural sciences ,Mediator ,Immune system ,Phagocytosis ,Cell Movement ,Bystander effect ,medicine ,Animals ,Humans ,Macrophage ,Particle Size ,0105 earth and related environmental sciences ,Membrane Potential, Mitochondrial ,chemistry.chemical_classification ,Reactive oxygen species ,Chemistry ,Macrophages ,Bystander Effect ,Macrophage Activation ,Tungsten Compounds ,021001 nanoscience & nanotechnology ,Coculture Techniques ,Nanostructures ,Cell biology ,medicine.anatomical_structure ,A549 Cells ,Nanotoxicology ,Metabolome ,Reactive Oxygen Species ,0210 nano-technology - Abstract
Bystander effects in biological systems are the responses shown by nontargeted neighboring cells, and critical to the bio-nano interface interactions. In addition to direct effects, bystander effects also determine the design, applications and safety of nanomaterials, although the related information of nanomaterial-induced bystander effects remain largely unknown. A coculture system of A549 and THP-1 was established to mimic the lung microenvironment to study the bystander effects of WS2 nanosheets (representative transition-metal dichalcogenide nanosheets) on microenvironment macrophages during the inhalation exposure or the nanomaterial biomedical application in the lung. Lung cells exposed to WS2 nanosheet resulted in an increase in reactive oxygen species and the depolarization of mitochondrial membrane potential in neighboring macrophages. Bystander exposure also induced macrophage polarization toward the anti-inflammatory M2 phenotype, which is adverse to disease therapy. Metabolomics showed that WS2 nanosheets disturbed the energy metabolism and amino acid metabolism of macrophages, consistent with the metabolic characteristics of M2 macrophages. Nitric oxide-transforming growth factor-β1 played an important mediator in the bystander effects. Importantly, WS2 nanosheet bystander exposure affected macrophage phagocytosis and migration and altered the macrophage immune response to endotoxin. This study improves the current understanding of bio-nano interactions and highlights the importance of neighboring cell responses, allowing us to use the maximum benefits of nanomaterials while limiting their adverse bystander effects.
- Published
- 2020
38. Variation in soil geochemical properties and microbial communities in areas under land developed for educational use (university and other campuses)
- Author
-
Yong Teng and Qixing Zhou
- Subjects
Soil test ,business.industry ,Soil organic matter ,Phosphorus ,Soil Science ,chemistry.chemical_element ,Development ,Agronomy ,chemistry ,Microbial population biology ,Environmental Chemistry ,Environmental science ,Land development ,Species richness ,business ,Relative species abundance ,Ammonium nitrogen ,General Environmental Science - Abstract
During land development, some important changes take place in the soil environment. Understanding these responses is of great significance for solving local and global environmental issues caused during land development. Till now, studies within education parks or university/college towns, especially inside and outside of a campus, were rarely reported. Herein, treating a campus as a semi‐open and coupled system, we collected soil samples (109 sites) inside and outside of a campus to reveal the variation in their soil‐geochemical parameters, available microelements, and microbial communities. Results shown that soil samples inside of the campus had lower pH (p
- Published
- 2020
39. Soil bacterial communities respond differently to graphene oxide and reduced graphene oxide after 90 days of exposure
- Author
-
Guifeng Li, Qixing Zhou, Junjie Du, Yongning Wu, Guoqin Li, and Jianhu Wu
- Subjects
chemistry.chemical_classification ,Ecology ,Graphene ,Oxide ,Soil Science ,chemistry.chemical_element ,Sulfur ,Nitrogen ,law.invention ,Nanomaterials ,chemistry.chemical_compound ,chemistry ,law ,Environmental chemistry ,Degradation (geology) ,Organic matter ,Aromatic hydrocarbon ,Ecology, Evolution, Behavior and Systematics - Abstract
Graphene-based nanomaterials (GBNs) are likely to be entering the soil environment in increasing amounts via consumer products. However, the disturbance of bacterial communities and their associated ecological functions by GBNs remains elusive. We performed a soil incubation experiment with the addition of graphene oxide (GO) and reduced graphene oxide (RGO). The Illumina sequencing technique was used to investigate changes in bacterial communities, and the functional groups of the communities were analyzed using the functional annotation of prokaryotic taxa database. After 90 days of exposure, RGO induced a lower bacterial richness than GO. However, GO induced larger changes in community composition and functions than RGO. After exposure to GBNs, some of the functional groups associated with organic matter degradation and biogeochemical cycling of nitrogen and sulfur decreased. However, the functional group associated with aromatic compound degradation increased, possibly because GBNs contain rich aromatic hydrocarbon structures, which are tolerated by this functional group.
- Published
- 2020
40. Size Matters: Nano-Biochar Triggers Decomposition and Transformation Inhibition of Antibiotic Resistance Genes in Aqueous Environments
- Author
-
Qixing Zhou, Baoshan Xing, Fei Lian, Shiguo Gu, Wenchao Yu, and Zhenyu Wang
- Subjects
Aqueous solution ,Chemistry ,Radical ,Drug Resistance, Microbial ,General Chemistry ,010501 environmental sciences ,01 natural sciences ,Decomposition ,Anti-Bacterial Agents ,Transformation (genetics) ,chemistry.chemical_compound ,Adsorption ,Charcoal ,Environmental chemistry ,Biochar ,Environmental Chemistry ,Fragmentation (cell biology) ,DNA ,0105 earth and related environmental sciences - Abstract
Antibiotic resistance genes (ARGs) are considered to be a type of emerging contaminant; their interaction with biochar (BC) could affect their dissemination and fate in the environment. Although adsorption of ARGs onto bulk-BC has been reported, the interaction with nanosized BC (nano-BC) is largely unknown. In this study, the interactions of a model extracellular DNA (eDNA, calf thymus DNA) and two typical ARGs (ampC and ermB) extracted from a natural river with bulk- and nano-BCs from two pyrolysis temperatures (400 and 700 °C) were investigated. Only adsorption was observed on bulk-BCs, while not only adsorption but also fragmentation of these eDNA molecules was found to occur on nano-BCs. Also, their replication was greatly inhibited by nano-BCs. The electron paramagnetic resonance results indicated that hydroxyl radicals produced from persistent free radicals (PFRs) on nano-BCs played a major role in the damage of eDNA. Moreover, the direct contact with nonradical reacting sites and PFRs on nano-BCs also contributed to the decay of eDNA. Comparatively, PFRs in bulk-BCs were difficult to be reached by eDNA because of steric hindrance and played a negligible role in destroying eDNA. These findings highlight the importance of the size effect in evaluating the reactivity and related environmental risks of PFRs on BC and improve our understanding on the interaction between ARGs and BC.
- Published
- 2020
41. Sunlight-assisted tailoring of surface nanostructures on single-layer graphene nanosheets for highly efficient cation capture and high-flux desalination
- Author
-
Lei Zhang, Qixing Zhou, and Xiangang Hu
- Subjects
Water transport ,Materials science ,Graphene ,Perforation (oil well) ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Desalination ,0104 chemical sciences ,law.invention ,Ion ,Nanomaterials ,Membrane ,Adsorption ,Chemical engineering ,law ,General Materials Science ,0210 nano-technology - Abstract
Highly efficient approaches using nanomaterials for ion capture and desalination have been widely explored to address fresh water scarcity worldwide; however, the complex preparation process and the large-scale and high-density perforation of porous graphene layers remain technical challenges. Herein, we found that sunlight-assisted tailoring of surface nanostructures involving controllable morphological and structural alterations of graphene unequivocally improved the ion adsorption and ion filtration performance. Notably, the interlayer spacing of single-layer graphene could be sufficiently tuned via lighting control to promote selective interactions between ions and nanosheets. After 7 d simulated sunlight treatment, the transformed SLG (SLG-S7) exhibited 86.1%, 77.3% and 46.1% increases of adsorption capacity for Na+, Pb2+ and Fe3+ in the complex ion system, respectively. Notably, the adsorption capacity of SLG-S7 for single Pb2+ was even 2.3-fold greater than that of pristine SLG. Further, the layer-stacked SLG-S7 membrane achieved super water fluxes (167.1 L m−2 h−1 bar−1) and a high separation performance without sacrificing salt ion rejection, which was attributed to the sunlight-induced larger water transport channels and defect-free nanosheets in the membrane. This work provides new insight for the design of novel graphene-based nanostructures to address the increasingly serious water contamination issue and the scarcity of fresh water.
- Published
- 2020
42. Bio‐electro‐Fenton systems for sustainable wastewater treatment: mechanisms, novel configurations, recent advances, LCA and challenges. An updated review
- Author
-
Qixing Zhou, Fengxiang Li, Tao Hua, and Shengnan Li
- Subjects
Microbial fuel cell ,Waste management ,Renewable Energy, Sustainability and the Environment ,General Chemical Engineering ,Organic Chemistry ,Pollution ,Inorganic Chemistry ,Energy conservation ,Waste treatment ,Fuel Technology ,Wastewater ,Environmental science ,Water treatment ,Sewage treatment ,Leachate ,Energy source ,Waste Management and Disposal ,Biotechnology - Published
- 2020
43. Effect of canola (Brassica napus) cultivar rotation on Plasmodiophora brassicae pathotype composition
- Author
-
Sheau-Fang Hwang, Qixing Zhou, Tiesen Cao, V. P. Manolii, and Stephen E. Strelkov
- Subjects
0106 biological sciences ,0303 health sciences ,food.ingredient ,biology ,Brassica ,Colza oil ,Sowing ,Plant Science ,Horticulture ,medicine.disease ,biology.organism_classification ,Plasmodiophora brassicae ,01 natural sciences ,Clubroot ,03 medical and health sciences ,food ,medicine ,Composition (visual arts) ,Cultivar ,Canola ,Agronomy and Crop Science ,030304 developmental biology ,010606 plant biology & botany - Abstract
In Canada, clubroot (Plasmodiophora brassicae) disease is managed mainly by planting clubroot resistant (CR) canola (Brassica napus). New pathotypes of P. brassicae have emerged recently, however, which are virulent on most CR canola cultivars. To understand the impact of cultivar rotation on pathotype abundance, greenhouse experiments were conducted in which different canola cultivar rotations were grown in a soil mix containing equal amounts of pathotypes 5X and 3, which are virulent and avirulent, respectively, on CR canola. The rotation treatments included: T1, the same susceptible cultivar planted over four cycles; T2, the same CR cultivar planted over four cycles; and T3, different CR cultivars planted in each cycle. Clubroot severity increased from cycles one to four in all treatments, with the exception of one CR cultivar in T3 that may carry a different source of resistance. Pathogen populations were recovered with a susceptible bait crop and pathotyped on the differentials of Williams plus a CR host (B. napus ‘Mendel’). The percentage of galls classified as pathotype 5X in T1 declined from 50% to 6.7% over the course of the experiment, while galls classified as pathotype 5X increased from 50% to 66.7% in both T2 and T3. Quantitative PCR analysis of the soil with pathotype 5X-specific primers generally confirmed an increase in 5X DNA. The results suggest that continuous planting of CR canola favours a rapid proliferation of virulent pathotypes of P. brassicae, as indicated by the increases in pathotype 5X observed in this study.
- Published
- 2020
44. Natural Nanocolloids Mediate the Phytotoxicity of Graphene Oxide
- Author
-
Hui Zeng, Qixing Zhou, Xiangang Hu, Yue Wang, and Shaohu Ouyang
- Subjects
Proteomics ,chemistry.chemical_classification ,Reactive oxygen species ,DNA damage ,Fatty acid ,Oxides ,General Chemistry ,010501 environmental sciences ,Photosynthesis ,Photosystem I ,behavioral disciplines and activities ,01 natural sciences ,Nanostructures ,chemistry ,mental disorders ,Biophysics ,Environmental Chemistry ,Humic acid ,Graphite ,Phytotoxicity ,Ecotoxicity ,0105 earth and related environmental sciences - Abstract
Nanocolloids (Ncs) are ubiquitous in natural surface waters. However, the effects of Ncs on the fate and ecotoxicity of graphene oxide (GO, a popular engineered nanomaterial (ENM)) remain largely unknown. Ncs exhibit strong adsorption affinity (KL = 1.93 L/mg) and high adsorption capacity (176.2 mg/g) for GO. After Ncs hybridization, GO nanosheets became scrolls, and the aggregation rate of GO decreased. The influence of humic acid and Ncs on GO toxicity was compared. Humic acid mitigated the phytotoxicity of GO. However, GO and GO-Ncs were found to have an envelopment effect on algal cells, and both could enter algal cells. GO-Ncs induced higher reactive oxygen species (ROS) generation, stronger DNA damage and plasmolysis, and more obvious inhibition of photosynthesis compared to GO. Proteomic analysis revealed that photosystem I- and II-related proteins (e.g., E1ZQR2 and E1ZPG5) were regulated more significantly in the GO-Ncs groups than in the GO groups. A combined proteomic and metabolomic analysis showed that inhibition of carbohydrate, fatty acid, and amino acid metabolism contributed to ROS generation. Given the high concentrations and activity of Ncs, the above results highlight the need for reconsideration of the Ncs-mediated environmental behaviors and risks of ENMs and other pollutants.
- Published
- 2020
45. Polycyclic musks in the environment: A review of their concentrations and distribution, ecological effects and behavior, current concerns and future prospects
- Author
-
Qixing Zhou, Qingqin Zhou, Yu Zhang, Linfang Zhu, Jianv Liu, and Wenying Zhang
- Subjects
Pollution ,Environmental Engineering ,business.industry ,media_common.quotation_subject ,0208 environmental biotechnology ,Distribution (economics) ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,020801 environmental engineering ,Environmental protection ,Chemical products ,Environmental science ,Current (fluid) ,business ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Water Science and Technology ,media_common - Abstract
Polycyclic musks (PCMs) are widely used in daily chemical products, so their mass production and wide use enable them to enter the environment in various ways. Their lipophilicity and persi...
- Published
- 2020
46. WS2 Nanosheets at Noncytotoxic Concentrations Enhance the Cytotoxicity of Organic Pollutants by Disturbing the Plasma Membrane and Efflux Pumps
- Author
-
Qixing Zhou, Xiangang Hu, and Peng Yuan
- Subjects
Pollutant ,Membrane permeability ,Substrate (chemistry) ,General Chemistry ,010501 environmental sciences ,Phosphate ,01 natural sciences ,Triclosan ,chemistry.chemical_compound ,Membrane ,chemistry ,Environmental chemistry ,Environmental Chemistry ,Efflux ,Xenobiotic ,0105 earth and related environmental sciences - Abstract
Emerging transition-metal dichalcogenide (TMDC) nanosheets, such as WS2 nanosheets, have shown tremendous potential for use in many fields such as intelligent manufacturing and environmental protection. However, considerable knowledge gaps still exist regarding the impact of TMDCs on environmental risks, especially risks involving organic pollutants. Here, a synergistic toxicity between WS2 nanosheets and organic pollutants (triclosan or tris(1,3-dichloro-2-propyl) phosphate) was found using the median-effect and combination index equations. In particular, the effect of synergy had a higher magnitude at low cytotoxicity levels and a noncytotoxic concentration of WS2 nanosheets clearly enhanced the cytotoxicity and intracellular accumulation of organic pollutants. On the one hand, WS2 nanosheets damaged the plasma membrane and cytoskeleton, resulting in increased membrane permeability and organic pollutant uptake. On the other hand, as shown by fluorescence substrate accumulation experiments and molecular dynamics simulations, WS2 nanosheets affected the secondary structure of the efflux pumps and competitively bound with efflux pumps, blocking xenobiotic removal. This work emphasized that TMDCs, especially at the noncytotoxic level, in combination with organic pollutants caused damage that cannot be ignored, providing insight into comprehensive safety assessment and the specific toxicological mechanisms of TMDCs that accompany organic pollutant exposure.
- Published
- 2020
47. Most Plasmodiophora brassicae Populations in Single Canola Root Galls from Alberta Fields are Mixtures of Multiple Strains
- Author
-
Jie Feng, Vachaspati Mishra, Michael W. Harding, Qixing Zhou, Krista Zuzak, Yalong Yang, Heting Fu, and David Feindel
- Subjects
Genetics ,education.field_of_study ,food.ingredient ,Population ,Virulence ,Plant Science ,Biology ,medicine.disease ,Clubroot ,genomic DNA ,food ,medicine ,Gall ,Primer (molecular biology) ,Canola ,education ,Agronomy and Crop Science ,Gene - Abstract
Clubroot, caused by Plasmodiophora brassicae, is an important disease on canola in Alberta, Canada. The pathogen is grouped into pathotypes according to their virulence reaction on differential hosts. Multiple pathotypes or strains are known exist in one field, one plant, or even one gall. This study was conducted with the objective of testing the prevalence of the coexistence of multiple strains in a single gall. In all, 79 canola clubroot galls were collected from 22 fields across Northern Alberta in 2018. Genomic DNA extracted from these single galls was analyzed using RNase H-dependent PCR (rhPCR). The rhPCR primers were designed to amplify a partial sequence of a dimorphic gene, with one primer pair specific to one sequence and the other primer pair specific to the alternative sequence. The amplification of both sequences from DNA obtained from a single gall would indicate that it contains two different P. brassicae strains. The rhPCR analyses indicated that the P. brassicae populations in 50 of the 79 galls consisted of more than one strain. This result emphasizes the need for cautious interpretation of results when a single-gall population is subject to pathotyping or being used as inoculum in plant pathology research. It also confirms that the maintenance of pathotype diversity within single root galls is a common occurrence which has implications for the durability, and stewardship, of single-gene host resistance.
- Published
- 2020
48. Quantum dots bind nanosheet to promote nanomaterial stability and resist endotoxin-induced fibrosis and PM
- Author
-
Qixing, Zhou, Dandan, Li, Suyan, Zhang, Simin, Wang, and Xiangang, Hu
- Abstract
Endotoxin lipopolysaccharide (LPS) is a harmful substance commonly found in various environments that causes lung fibrosis. Exposure to PM
- Published
- 2022
49. Enhanced Carbon Emission Driven by the Interaction between Functional Microbial Community and Hydrocarbons: An Enlightenment for Carbon Cycle
- Author
-
Zelin Hou, Qixing Zhou, Fan Mo, and Weilu Kang
- Subjects
History ,Polymers and Plastics ,Business and International Management ,Industrial and Manufacturing Engineering - Published
- 2022
50. Metal status in soils within a developing education park: Potential risk of land development
- Author
-
Yong Teng and Qixing Zhou
- Subjects
Pollution ,Soil test ,business.industry ,media_common.quotation_subject ,Soil Science ,Soil classification ,Context (language use) ,04 agricultural and veterinary sciences ,010501 environmental sciences ,Development ,Spatial distribution ,01 natural sciences ,Soil contamination ,Environmental protection ,Soil water ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental Chemistry ,Environmental science ,Land development ,business ,0105 earth and related environmental sciences ,General Environmental Science ,media_common - Abstract
Many countries have developed university/college towns with specific characteristics (temporal, spatial, structural, and functional aspects). During the land development, there were obvious changes in soil metal levels and distribution patterns attributed to anthropogenic activities, thus having induced comparable results in university/college towns due to similar anthropogenic activities. Until now, specific studies on the metal status in university/college towns, especially the variation inside and outside of a campus were rarely involved. Herin we report on 109 soil samples around a new campus within a developing education park, in which the levels, spatial distributions, and possible sources of (alkali, alkaline‐earth, transition, and main group) metals and metalloids (Cd, Cr, As, Pb, Zn, Cu, Mn, Ba, Ni, Ti, Be, Bi, Sb, Sn, Co, V, and Zr) were systematically investigated. The Nemerow pollution indexes, spatial analysis, principal components analysis, and cluster analysis were calculated and analyzed. The results showed that the level of most metals within the campus with different functional areas (college, activity, and greening areas) was 1–1.3‐times as much as that outside in four directions and had greater variations. Moreover, the level of most metals was 1–1.5‐times as much as their background value and they distributed in the areas under specific developments and might mainly be attributed to anthropogenic sources. These findings provide the knowledge about effects of land development and anthropogenic activities on soil metal status that could be used by university/college towns in the similar context around the world.
- Published
- 2019
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