30 results on '"Hangbiao Jin"'
Search Results
2. First evidence of neonicotinoid insecticides in human bile and associated hepatotoxicity risk
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Yuanchen Chen, Wenfei Yu, Li Zhang, Linping Cao, Jun Ling, Kaizhen Liao, Guofeng Shen, Wei Du, Kangjie Chen, Meirong Zhao, Jian Wu, and Hangbiao Jin
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Environmental Engineering ,Health, Toxicology and Mutagenesis ,Environmental Chemistry ,Pollution ,Waste Management and Disposal - Abstract
Neonicotinoids (NEOs) are widely applied in agricultural lands and are widespread in different environments, accelerating threats to ecosystems and human health. A number of in vitro/in vivo studies have reported adverse effects of NEOs on mammalian health, but the link between NEO exposure and toxic effects on human liver remains unclear. We randomly recruited 201 participants and quantified eight commercialized NEOs in bile. High frequency and concentration of detection indicate low degradation of human liver on NEOs. The main NEOs are nitenpyram and dinotefuran, which contribute to about 86% of the total residual levels of eight NEOs, due to the highest solubility in bile and are not degraded easily in liver. In contrast, imidacloprid and thiacloprid are major compounds in human blood, according to previous studies, suggesting that individual NEOs behave differently in blood and bile distribution. There was no statistical difference in NEO residues between cancer and non-cancer participants and among the different participant demographics (e.g., age, gender, and body mass index). The serum hematological parameters -bile acid, total bilirubin, cholesterol and alkaline phosphatase -were positively correlated with individual NEO concentrations, suggesting that NEO exposure affects liver metabolism and even enterohepatic circulation. The study first examined the NEO residues in human bile and provided new insights into their bioavailability and hepatoxicity risk.
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- 2022
3. Metabolomics and transcriptomics reveal the toxic mechanism of Cd and nano TiO2 coexposure on rice (Oryza sativa L.)
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Liwen Qiang, Nan Zhao, Kaizhen Liao, Xichao Sun, Qiang Wang, and Hangbiao Jin
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Environmental Engineering ,Health, Toxicology and Mutagenesis ,Environmental Chemistry ,Pollution ,Waste Management and Disposal - Published
- 2023
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4. Concentrations and isomer profiles of perfluoroalkyl carboxylates in house rats (Rattus norvegicus) and human blood: Implication for human exposure sources
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Nan Zhao, Hangbiao Jin, Weili Mao, Meirong Zhao, and Yuanchen Chen
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Environmental Engineering ,Environmental Chemistry ,Pollution ,Waste Management and Disposal - Published
- 2023
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5. Emerging poly- and perfluoroalkyl substances in water and sediment from Qiantang River-Hangzhou Bay
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Haixiang Cheng, Hangbiao Jin, Bin Lu, Chenhan Lv, Yinghui Ji, Hui Zhang, Rui Fan, and Nan Zhao
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Environmental Engineering ,Environmental Chemistry ,Pollution ,Waste Management and Disposal - Published
- 2023
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6. Serum concentrations of phthalate metabolites in pregnant women and their association with gestational diabetes mellitus and blood glucose levels
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Hanzhi Wang, Rongrong Chen, Yu Gao, Jianli Qu, Yingying Zhang, Hangbiao Jin, Meirong Zhao, and Xiaoxia Bai
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Blood Glucose ,Environmental Engineering ,Phthalic Acids ,Environmental Exposure ,Pollution ,Diabetes, Gestational ,Pregnancy ,Case-Control Studies ,Environmental Chemistry ,Humans ,Female ,Environmental Pollutants ,Pregnant Women ,Waste Management and Disposal - Abstract
Phthalate metabolites are widely present in humans and can have many adverse effects on pregnant women. To date, many studies on the effects of phthalate metabolites on the risk of gestational diabetes mellitus (GDM) have been published, but the findings of these studies are controversial. We conducted a case-control study to quantify the concentrations of seven phthalate metabolites in the serum of pregnant women and to investigate their association with the risk of GDM and blood glucose levels in pregnant women. Therefore, 201 serum samples (139 pregnant women with GDM and 62 control serum samples) were collected from Hangzhou, China, between 2011 and 2012. The results showed that mono butyl phthalate (MBP; mean = 4.08 ng/mL) was the most abundant phthalate metabolites in human serum, followed by mono (2-ethylhexyl) phthalate (MEHP; mean = 1.28 ng/mL) and mono isobutyl phthalate (MiBP; mean = 1.20 ng/mL). The other results indicated significant associations between MBP (β = 2.24, 95 % confidence interval (CI): 1.02, 5.07, P = 0.050) and MiBP (β = 1.84, 95 % CI: 1.03, 3.31, P = 0.041) concentrations in human serum and the incidence of GDM. Moreover, serum MBP (β = 0.40, 95 % CI: 0.10, 0.70, P = 0.010) and MiBP levels (β = 0.18, 95 % CI: 0.010, 0.35, P = 0.047) in humans were positively associated with 2-hour blood glucose levels. Our study provides affirmative evidence on previously inconsistent findings that MBP and MiBP exposure may increase the risk of GDM in pregnant women.
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- 2022
7. Microplastics in Antarctic krill (Euphausia superba) from Antarctic region
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Wenbin Zhu, Wenbo Liu, Yuanchen Chen, Kaizhen Liao, Wenfei Yu, and Hangbiao Jin
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Environmental Engineering ,Environmental Chemistry ,Pollution ,Waste Management and Disposal - Published
- 2023
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8. Polyhalogenated carbazoles in indoor dust from Hangzhou, China
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Hongyu, Zhou, Xiaowei, Dong, Nan, Zhao, Meirong, Zhao, and Hangbiao, Jin
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China ,Polychlorinated Dibenzodioxins ,Environmental Engineering ,Air Pollution, Indoor ,Humans ,Environmental Chemistry ,Dust ,Dioxins ,Pollution ,Waste Management and Disposal ,Water Pollutants, Chemical - Abstract
Carbazoles (CZ) and polyhalogenated carbazoles (PHCZs), showing dioxin-like toxicity, have gained increasing attention in recent years as novel persistent organic pollutants. However, the occurrence of these chemicals in indoor dust from China remains not well known. In this study, CZ and 11 chloro/bromo CZs were analyzed in indoor dust samples collected from residential houses in rural (n = 51) and urban (n = 55) regions of Hangzhou, China. CZ was detected in all indoor dust samples, with the concentrations of 0.81-18 ng/g (mean 5.4 ng/g). All 11 measured PHCZs were detected in indoor dust samples, showing the detection frequency of 7.3-96 %. This means that general populations had wide exposure to CZ and PHCZs through indoor dust ingestion. 3,6-dichlorocarbzole (36-CCZ) and 3,6-dibromocarbazole (36-BCZ) were the predominant PHCZs in indoor dust, having comparable mean concentrations of 1.2 ng/g, followed by 3-monobromocarbazole (3-BCZ; mean 0.66 ng/g, rangeLOD-2.1 ng/g) and 1,3,6-tribromocarbazole (136-BCZ; 0.36 ng/g,LOD-1.0 ng/g). Indoor dust concentrations of 3-BCZ, 36-BCZ, and 1,3,6,8-tetrabromocarbazole in urban regions were significantly (p ≤ 0.01-0.035) higher than that in rural regions. Daily intakes (DIs) of CZ and PHCZs through indoor dust ingestion were estimated for general Chinese population. Among PHCZs, 36-CCZ and 36-BCZ (mean 1.4-3.4 pg/kg bw/day) had the highest mean DIs, followed by 3-BCZ (0.77-1.9 pg/kg bw/day) and 136-BCZ (0.42-1.0 pg/kg/day). To our knowledge, this is the first study reporting the concentrations of CZ and PHCZs in indoor dust from China, which contributes to the better understanding of the sources of human exposure to CZ and PHCZs.
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- 2023
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9. Phthalate metabolites in paired human serum and whole blood
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Zhenming Li, Dexin Wu, Yu Guo, Weili Mao, Nan Zhao, Meirong Zhao, and Hangbiao Jin
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Adult ,Male ,Young Adult ,Environmental Engineering ,Phthalic Acids ,Environmental Chemistry ,Humans ,Female ,Environmental Pollutants ,Environmental Exposure ,Pollution ,Waste Management and Disposal ,Dibutyl Phthalate - Abstract
Presence of phthalate metabolites (PMs) in human serum has been well documented. However, the distribution pattern of PMs in different human blood matrixes remains not well known. To investigate this, paired serum and whole blood samples were collected from 145 adults (76 males and 69 females) in Quzhou, China, and analyzed for nine PMs in this study. All PMs had high detection frequencies (70%) in human serum and whole blood, except mono benzyl phthalate. Total concentrations of detected PMs in serum and whole blood were 0.70-61 ng/mL (mean 12 ng/mL) and 1.6-33 ng/mL (7.5 ng/mL), respectively. Mono methyl phthalate (MMP), mono (2-ethylhexyl) phthalate, and mono butyl phthalate were consistently the predominant PMs in human serum and whole blood, with the mean concentrations of 3.4 and 2.0 ng/mL, 3.3 and 2.1 ng/mL, and 2.8 and 1.8 ng/mL, respectively. Females had higher mean serum concentrations of PMs, except MBP, than males. Youngest age group (20-30 years) consistently had the lowest mean whole blood levels of all PMs. For the first time, the distribution pattern of PMs in human blood was evaluated based on the calculated partitioning coefficient (K
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- 2021
10. Distribution of per- and poly-fluoroalkyl substances and their precursors in human blood
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Daxi, Liu, Bo, Tang, Saisai, Nie, Nan, Zhao, Li, He, Jiansheng, Cui, Weili, Mao, and Hangbiao, Jin
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Fluorocarbons ,Sulfonamides ,Environmental Engineering ,Alkanesulfonic Acids ,Health, Toxicology and Mutagenesis ,Carboxylic Acids ,Humans ,Environmental Chemistry ,Caprylates ,Pollution ,Waste Management and Disposal - Abstract
Many studies have examined per- and poly-fluoroalkyl substances (PFASs) in human blood. However, the distribution of PFASs in human blood remains not well known, especially for perfluorooctane sulfonate (PFOS) precursors. In this study, human blood samples (n = 162) were collected from general Chinese population, and then the isomer-specific partitioning of PFASs between human plasma and red blood cells (RBCs) were investigated. Perfluorooctanoate (PFOA) and PFOS were consistently the predominant PFASs in both human plasma and RBCs. In human blood, among C
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- 2023
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11. Bioaccumulation and biomagnification of emerging poly- and perfluoroalkyl substances in marine organisms
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Haixiang, Cheng, Chenhan, Lv, Jianhui, Li, Dexin, Wu, Xugang, Zhan, Ying, Song, Nan, Zhao, and Hangbiao, Jin
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Alkanesulfonates ,Fluorocarbons ,Aquatic Organisms ,China ,Food Chain ,Environmental Engineering ,Bioaccumulation ,Pollution ,Alkanesulfonic Acids ,Animals ,Environmental Chemistry ,Waste Management and Disposal ,Ecosystem ,Water Pollutants, Chemical ,Ethers ,Environmental Monitoring - Abstract
Accumulating evidence has demonstrated the wide environmental presence of 6:2 chlorinated polyfluoroalkyl ether sulfonates (6:2 Cl-PFAES) and p-perfluorous nonenoxybenzene sulfonate (PFNOBS). However, data on the bioaccumulation and trophic magnification of these emerging poly- and perfluoroalkyl substances (PFASs) in subtropical marine environment is still limited. In this study, seawater (n = 17), sediment (n = 14), and marine organism (27 species; n = 177) samples were collected from East China Sea, and analyzed them for legacy and emerging PFASs. Besides perfluoroalkyl carboxylates and perfluorooctane sulfonate (PFOS), 6:2 Cl-PFAES was always among the predominant PFASs detected in seawater, sediment, and marine organism. For emerging PFASs, 6:2 Cl-PFAES (mean ± SD, 3.1 ± 0.17), 8:2 Cl-PFAES (3.3 ± 0.35), and PFNOBS (3.3 ± 0.19) had lower bioaccumulation factors (BAF) than PFOS (3.4 ± 0.22) in marine fish. In crab, PFNOBS (3.7 ± 0.33) had a lower biota-sediment accumulation factor (BSAF) than PFOS (3.9 ± 0.45). In snail, among all detected PFASs, PFNOBS (4.0 ± 0.42) had the highest mean log BSAF value. 8:2 Cl-PFAES consistently had a higher log BSAF value than 6:2 Cl-PFAES in snail and crab. Notably, these differences in BAF and BSAF are not significant. Among PFASs, 6:2 Cl-PFAES (2.3; 95 % confidence interval, CI: 1.9-2.6) displayed the highest trophic magnification factor (TMF). PFNOBS had the lowest TMF value (1.8, 95 % CI: 1.4-2.1), but which still indicates its weak biomagnification through the current marine food web. This is the first study reporting the bioaccumulation and biomagnification of PFNOBS in marine organisms, which deepens the understanding of its environmental behavior in the marine ecosystem.
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- 2022
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12. Spatial distribution, partitioning, and ecological risk of short chain chlorinated paraffins in seawater and sediment from East China Sea
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Meirong Zhao, Hongmei Hu, Pengfei Wu, Kaida Xu, Wenbin Zhu, Yuanming Guo, Yanqiu Zhou, Tiejun Li, and Hangbiao Jin
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China ,Environmental Engineering ,Range (biology) ,Sediment ,Spatial distribution ,Pollution ,Dry weight ,Chlorinated paraffins ,Paraffin ,Environmental chemistry ,Hydrocarbons, Chlorinated ,Environmental Chemistry ,Environmental science ,Humans ,Ecosystem ,Seawater ,Waste Management and Disposal ,China sea ,Environmental Monitoring - Abstract
Short chain chlorinated paraffins (SCCPs) have attracted increasing attention due to their potential risks to the ecosystem and human health. However, there is still a lack of systematic research on their environmental fate in the coastal marine environment. In this study, we collected paired seawater (n = 40) and surface sediment samples (n = 40) from East China Sea, and investigated their spatial distribution, partitioning behaviors and ecological risks. The total SCCP concentrations (∑SCCPs) in seawater and sediment samples were in the range of 12.2–430 ng/L and 89.6–351 ng/g (dry weight), respectively. C10–11 SCCPs and Cl5–7 SCCPs were the predominant homologues in all of the samples. This study first calculated the field-based logKOC values for ∑SCCPs in the marine environment, which ranged from 5.0 to 6.5 (mean 5.5). The logKOC values of SCCP homologues (range 3.6–8.0, mean 5.6) showed a weak correlation with their logKOW (R = 0.214, p
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- 2021
13. Disposition of Bisphenol S metabolites in Sprague-Dawley rats
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Weili Mao, Lingling Mao, Nan Zhao, Yingying Zhang, Meirong Zhao, and Hangbiao Jin
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Rats, Sprague-Dawley ,Environmental Engineering ,Glucuronides ,Phenols ,Environmental Chemistry ,Animals ,Sulfones ,Benzhydryl Compounds ,Pollution ,Waste Management and Disposal ,Rats - Abstract
Bisphenol S (BPS), a primary bisphenol A (BPA) substitute, has shown a comparable estrogenic activity to BPA. To comprehensively evaluate the toxic effect of human BPS exposure, it is necessary to understand the occurrence of free BPS and its conjugated metabolites in human internal tissues, but which remains unclear. In this study, Sprague-Dawley rats were orally and continuously dosed at 500 μg/kg/day to mimic the actual human BPS exposure scenario, and then free BPS and its conjugated metabolites were analyzed in rat internal tissues, blood, and excreta. Results showed that concentrations of free BPS and its metabolites in most rat tissues, excreta, and blood reached the steady state after 9 days of continuous BPS dosage. In rat urine, 81-84% of BPS was present in the conjugated form, with BPS glucuronide (BPS-G) and BPS sulfate (BPS-S) accounting for mean 83% and 16% of total conjugated BPS, respectively. In rat blood, mean 55% of total BPS was present in the conjugated form, with BPS-G (2.4-2.8 ng/mL) being more abundant than BPS-S (0.19-0.25 ng/mL). Among rat tissues, the mean proportion of free BPS was relatively higher in spleen (76%) and stomach (75%), while lower in intestine (14%) and kidney (36%). BPS-G was more abundant than BPS-S in most rat tissues, such as intestine (mean 93% versus 6.5%) and muscle (78% versus 19%). While, the mean proportion of BPS-S (48%) was higher than BPS-G (33%) in rat liver. These data suggest that analyzing human blood and urine may not accurately reflect the contamination of BPS metabolites in human internal tissues. This study contributes to the better understanding of the metabolic fate of BPS in humans.
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- 2021
14. Occurrence and partitioning of bisphenol analogues, triclocarban, and triclosan in seawater and sediment from East China Sea
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Yingying Zhang, Hangbiao Jin, Jiahui Xie, Meirong Zhao, Hongmei Hu, and Nan Zhao
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Bisphenol A ,China ,Environmental Engineering ,Bisphenol ,Health, Toxicology and Mutagenesis ,Triclocarban ,Public Health, Environmental and Occupational Health ,Sediment ,General Medicine ,General Chemistry ,Pollution ,Triclosan ,chemistry.chemical_compound ,chemistry ,Bisphenol S ,Phenols ,Environmental chemistry ,Environmental Chemistry ,Tetrabromobisphenol A ,Seawater ,Benzhydryl Compounds ,Carbanilides - Abstract
Bisphenol analogues (BPs), triclocarban (TCC), and triclosan (TCS) are well-known environmental endocrine disrupters. Many studies have characterized their occurrence in the freshwater environment. However, their environmental behaviors in the coastal marine environment remain poorly understood. Here, matched seawater and sediment samples were collected from East China Sea, and analyzed for 13 BPs (including halogenated derivatives of bisphenol A), TCC, and TCS. Bisphenol A (BPA; mean 23 ng/L) was the predominant BP in seawaters, followed by tetrabromobisphenol A (TBBPA; 2.3 ng/L) and bisphenol S (BPS; 2.2 ng/L). Seawater concentrations of TCS (LOD-8.7 ng/L) were much higher (p 0.01) than that of TCC (LOD-0.33 ng/L). In sediments BPA was still the major BP (mean 13 ng/g dw, dry weight), followed by bisphenol F (1.6 ng/g dw) and BPS (0.69 ng/g dw). All sediment samples contained measurable TCC (0.12-6.6 ng/g dw), while TCS was occasionally detected. For the first time, this study reports the environmental occurrence of bisphenol M and 4,4'-sulfonylbis (2-aminophenol) (a first discovered BPS analogue) in seawaters and sediments. Spatially, inshore seawater and sediment samples contained higher (p 0.01) BPA and BPS concentrations, compared with offshore samples. The mean log-transformed sediment-seawater partitioning coefficients (log K
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- 2021
15. Semi-volatile organic compounds in tap water from Hangzhou, China: Influence of pipe material and implication for human exposure
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Yan Li, Wei Dai, Pengfei Wu, Quan Zhang, Hangbiao Jin, Wucheng Wang, Jianqiang Zhu, and Xiaoying Hu
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China ,Environmental Engineering ,010504 meteorology & atmospheric sciences ,010501 environmental sciences ,Risk Assessment ,01 natural sciences ,chemistry.chemical_compound ,Tap water ,Water Supply ,Low exposure ,Humans ,Environmental Chemistry ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Volatile Organic Compounds ,Drinking Water ,Phthalate ,Organochlorine pesticide ,Environmental Exposure ,Hazard index ,Reinforced concrete ,Pollution ,chemistry ,Human exposure ,Environmental chemistry ,Environmental science ,Water Pollutants, Chemical ,Environmental Monitoring - Abstract
Investigations on environmental behaviors of SVOCs have recently received great attention. However, the SVOC occurrence and influence of pipe materials on SVOC levels in the tap water have received little attention. Herein, we collected tap water samples from 25 households constructed at different ages in Hangzhou, China. Concentrations of 61 SVOCs, including phthalate esters (PAEs), organochlorine pesticides (OCPs), polycyclic aromatic hydrocarbons (PAHs), and polychlorinated biphenyls (PCBs), were simultaneously determined in these collected samples. The potential human exposure risks were evaluated via the hazard index calculation. Our results showed that the total concentration of detected SVOCs (∑SVOCs) ranged from 110 to 289 μg/L (mean, 179 μg/L), and the SVOCs were dominated by PAHs (mean, 116 ng/L) and PAEs (mean, 55 ng/L) in Hangzhou tap water. 12 PCB congeners were detected in Hangzhou tap water samples, with hepta-CBs (68% of samples) as the most frequently detected PCBs. Nearly all tap water samples contained measurable o, p'-DDE, p, p'-DDT, and p, p'-DDD, and ∑DDTs had significantly (p 0.05) higher concentrations than ∑HCHs. All target PAHs had high detection frequencies (72%) in tap water samples, with their mean concentrations in the range of 2.1-41 ng/L. Tap water from steel pipes had relatively lower SVOC concentrations than that from either reinforced concrete, gray cast iron, or ductile iron pipes. Although no carcinogenic risks originating from exposure to SVOCs through ingestion and bathing were observed, the tap water from steel pipes showed relatively low exposure risks than that from other materials. Data provided here, for the first, are helpful in understanding the influence of pipe materials on human SVOC exposure risks through tap water intake.
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- 2019
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16. Biotransformation and bioconcentration of 6:2 and 8:2 polyfluoroalkyl phosphate diesters in common carp (Cyprinus carpio): Underestimated ecological risks
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Liping Yang, Keyan He, Tingting Guo, Lingyan Zhu, Qiang Wang, Menglin Liu, Meng Chen, and Hangbiao Jin
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Carps ,Environmental Engineering ,010504 meteorology & atmospheric sciences ,010501 environmental sciences ,Risk Assessment ,01 natural sciences ,Cyprinus ,Common carp ,chemistry.chemical_compound ,Biotransformation ,Animals ,Environmental Chemistry ,Carp ,Fluorotelomer ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Fluorocarbons ,Dose-Response Relationship, Drug ,biology ,Acid phosphatase ,Esters ,Glutathione ,biology.organism_classification ,Pollution ,Organophosphates ,S9 fraction ,chemistry ,Biochemistry ,biology.protein ,Water Pollutants, Chemical - Abstract
Polyfluoroalkyl phosphates esters (PAPs) are widely used in a variety of commercial products, and have been detected in many aquatic organisms. In this study, common carps (Cyprinus carpio) were administered with 6:2 and 8:2 diPAP in water to investigate their bio-accumulation and transformation in fish. Several degradation products, including fluorotelomer unsaturated carboxylic acids (6:2 and 8:2 FTUCA), 5:3 and 7:3 fluorotelomer carboxylic acids (5:3 and 7:3 FTCA), perfluoroalkyl carboxylates (PFCAs) were identified in the carp liver. In addition, several phase-II metabolites, such as glutathione- and glucuronide-conjugated compounds were detected in the carp bile. 8:2 diPAP displayed lower accumulation potential than 6:2 diPAP probably due to its relatively large molecular size. However, 8:2 diPAP experienced more extensive transformation (transformation rate 6.78–14.6 mol%) and produced more phase I metabolites than 6:2 diPAP (0.49–0.66 mol%). The in vitro incubation with the liver S9 fraction confirmed that biotransformation of 6:2 and 8:2 diPAP took place in the carp liver. Further analyses of enzyme activities indicated that acid phosphatase (ACP) could be involved in mediating phase I while glutathione S-transferase (GST) involved in phase II metabolism of 6:2 and 8:2 diPAP in carp.
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- 2019
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17. Microplastics in dust from different indoor environments
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Jianqiang Zhu, Xingqing Zhang, Kaizhen Liao, Pengfei Wu, and Hangbiao Jin
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Adult ,Environmental Engineering ,Microplastics ,Infant ,Dust ,Pollution ,Polyethylene ,Air Pollution, Indoor ,Housing ,Humans ,Environmental Chemistry ,Plastics ,Waste Management and Disposal ,Environmental Monitoring - Abstract
Microplastics (MPs) are present in global indoor dust, which is an important source of MPs for humans. However, few researchers have investigated differences in the abundance and characteristics of MPs in dust in different indoor environments. In this study, we found that residential apartments (mean: 1174 MPs/g; n = 47) had the highest abundance of MPs in indoor dust samples, followed by offices (896 MPs/g; n = 50), business hotels (843 MPs/g; n = 53), university dormitories (775 MPs/g; n = 48), and university classrooms (209 MPs/g; n = 44). The predominant shape of MPs was fiber in most indoor dust samples. The main size fraction of the MPs in the indoor dust samples from university classrooms and business hotels was 201-500 μm, and it was 501-1000 μm in those from offices, university dormitories, and residential apartments. The main MP polymer in indoor dust samples from business hotels, university dormitories, and residential apartments was polyester, whereas those from offices and university classrooms were mainly polyethylene and polypropylene. We calculated the estimated daily intake (EDI) of MPs through the inhalation of indoor dust, and found that infants (7.4 MPs/kg bw/day) had a higher mean EDI of MPs than toddlers (1.4 MPs/kg bw/day), children (0.49 MPs/kg bw/day), adults (0.23 MPs/kg bw/day), and university students (0.22 MPs/kg bw/day). To the best of our knowledge, we are the first to report differences in MP occurrence in dust samples from different indoor environments, and our findings provide a more accurate understanding of exposure risks of MPs to humans.
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- 2022
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18. Estimation of the psychoactive substances consumption within 12 wastewater treatment plants service areas in a certain city of Guangxi, China applying wastewater-based epidemiology
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Hangbiao Jin, Dan Yang, Meirong Zhao, Jinyang Zhang, Yunbin Hao, Pengfei Wu, and Weiping Liu
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China ,Wastewater-Based Epidemiological Monitoring ,Environmental Engineering ,010504 meteorology & atmospheric sciences ,Psychoactive substance ,010501 environmental sciences ,Wastewater ,01 natural sciences ,Water Purification ,chemistry.chemical_compound ,Tandem Mass Spectrometry ,Environmental health ,medicine ,Environmental Chemistry ,Humans ,Cities ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Consumption (economics) ,Illicit Drugs ,MDMA ,Wastewater based epidemiology ,Meth ,Pollution ,Substance Abuse Detection ,chemistry ,Environmental science ,Sewage treatment ,Risk prevention ,Water Pollutants, Chemical ,medicine.drug - Abstract
The abuse of psychoactive substances has been increasing dramatically over the last few years, which is becoming a concern for human health and social stability. How to accurately estimate psychoactive substances' total consumption in certain areas is the key to manage such substances. In order to control psychoactive substances, 8 psychoactive substances' consumption within 12 wastewater treatment plants (WWTPs) service areas in a certain city of Guangxi, China was investigated in 2019. Firstly, a solid-phase extraction-liquid chromatography-tandem mass spectrometry method was used to determine the influent concentrations. Morphine (MOR), 3, 4-methylenedioxymethamphetamine (MDMA), methamphetamine (METH), ketamine (KET), and norketamine (NK) were detected, with the concentrations ranging from less than method detection limit (NK, MDMA) to 170.91 (METH) ng/L. Then, the back-estimation of consumption was conducted according to the objective and near real-time wastewater-based epidemiology (WBE). The results demonstrate that KET, MOR, and METH are the most abused psychoactive substances, with the mean consumption of 682.42, 167.81, and 44.56 mg/day/1000 inh, respectively. The psychoactive substance residues of WWTPs influent were analyzed to estimate such substances' consumption in specific areas, so as to provide support for risk prevention and control.
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- 2021
19. Differences of bisphenol analogue concentrations in indoor dust between rural and urban areas
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Hangbiao Jin, Pengfei Wu, Nan Zhao, Jiansheng Cui, Meirong Zhao, Sai-Sai Nie, and Daxi Liu
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Adult ,Rural Population ,Bisphenol A ,China ,Environmental Engineering ,Daily intake ,Bisphenol ,Health, Toxicology and Mutagenesis ,0208 environmental biotechnology ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,chemistry.chemical_compound ,Phenols ,Environmental Chemistry ,Humans ,Benzhydryl Compounds ,Child ,0105 earth and related environmental sciences ,Public Health, Environmental and Occupational Health ,Infant ,Dust ,General Medicine ,General Chemistry ,Pollution ,020801 environmental engineering ,chemistry ,Bisphenol S ,Environmental chemistry ,Air Pollution, Indoor ,Environmental science - Abstract
Bisphenol analogues (BPs) are widely applied in varying consumer products. Many studies have reported their presence in indoor dust samples from China. However, the differences in occurrence and concentration profiles of BPs in indoor dust between rural and urban areas are still not well characterized. In this study, eight BPs were measured in 60 indoor dust samples collected from rural and urban districts of Hangzhou, China. Bisphenol A (BPA; mean 1.8 μg/g, range 0.20-7.2 μg/g) was the predominant BP in indoor dust samples, accounting for mean 57% of the total BP (∑BP) concentration, followed by bisphenol S (BPS; 0.58 μg/g,LOD-2.4 μg/g) and bisphenol AF (0.43 μg/g,LOD-2.6 μg/g). Indoor dust samples from the urban areas (n = 27) contained significantly (p 0.05) higher levels of ∑BPs, BPA, and BPS than that from the rural areas (n = 33). Comparatively, bisphenol F and bisphenol AP were more frequently detected in urban indoor dust samples. Daily intakes (DIs) of BPs through the indoor dust inhalation were estimated for infants, children, and adults. Infants had much higher (p 0.01) DIs of BPs than children and adults, mainly owing to their lower body weights and higher indoor dust ingestion rates. To our knowledge, this is one of the first studies examining the regional differences of BP concentrations in indoor dust from China, which could contribute to the more accurate evaluation of human BP exposure through indoor dust intake.
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- 2020
20. Consequential fate of bisphenol-attached PVC microplastics in water and simulated intestinal fluids
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Hangbiao Jin, Zongwei Cai, Yuanyuan Tang, Yunsong Liu, Pengfei Wu, and Yuanyuan Song
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lcsh:GE1-350 ,Microplastics ,endocrine system ,Environmental Engineering ,Ecology ,Bisphenol ,Chemistry ,Cytotoxicity ,Bioaccessibility ,Bisphenols ,Environmental Science (miscellaneous) ,Contamination ,lcsh:TD1-1066 ,Polyvinyl chloride ,chemistry.chemical_compound ,Desorption behavior ,Adsorption ,Desorption ,Environmental chemistry ,Water environment ,Freundlich equation ,lcsh:Environmental technology. Sanitary engineering ,lcsh:Environmental sciences - Abstract
The ever-increasing prevalence of microplastics and different bisphenols made the presence of bisphenol-attached microplastics a critical concern. In this study, experiments were performed to examine desorption behaviors and cytotoxicity performance of contaminated microplastics in aquatic surroundings and intestinal environment after ingestion by organisms (cold-/warm-blooded). The kinetic study shows that the rate of desorption for bisphenols can be enhanced threefold under simulated warm intestinal conditions. The Freundlich isotherms indicate multiple-layer desorption of the bisphenols on the heterogeneous surfaces of polyvinyl chloride (PVC) microplastics. Hysteresis was detected in the adsorption/desorption of bisphenols in a water environment, but no adsorption/desorption hysteresis was observed in the simulated intestinal conditions of warm-blooded organisms. Due to enhanced bioaccessibility, the desorption results imply that the environmental risk of contaminated PVC microplastics may be significantly increased after ingestion at a high bisphenols dosage. Although with different IC50, the five bisphenols released under the intestinal conditions of warm-blooded organisms can cause higher proliferation reduction in fish and human cell lines than the bisphenols released in water. This study helps elucidate the consequential fate and potential cytotoxicity of contaminated microplastics and the possible implications of the microplastics as a critical vector for bisphenols to increase the potential health risks.
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- 2020
21. Occurrence of phthalic acid esters in sediment samples from East China Sea
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Hangbiao Jin, Shuhong Fang, Hongmei Hu, and Meirong Zhao
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Environmental Engineering ,010504 meteorology & atmospheric sciences ,Phthalate ,Sediment ,010501 environmental sciences ,Diethyl phthalate ,01 natural sciences ,Pollution ,chemistry.chemical_compound ,Phthalic acid ,chemistry ,Benthos ,Environmental chemistry ,Environmental Chemistry ,Environmental science ,Waste Management and Disposal ,Bay ,Dimethyl phthalate ,0105 earth and related environmental sciences ,China sea - Abstract
Phthalic acid esters (PAEs) are widely used as plasticizers in many industrial and household products. The widespread distribution of PAEs in marine environment has attracted great concerns, due to their adverse health effects on marine organisms. However, the data on the occurrence of PAEs in sediment from East China Sea is still scarce. In this study, 16 PAEs were analyzed in 67 sediment samples collected from the Hangzhou Bay, Taizhou Bay, and Wenzhou Bay. Eight PAEs were detected in collected sediment samples, and the total concentrations of detected PAEs (∑PAEs) were in the range of 654–2603 ng/g. The di(2-ethylhexyl) phthalate (DEHP) was the predominant PAE (mean 663 ng/g; accounted for mean 52% of ∑PAEs), followed by di-isobutyl phthalate (DiBP; 284 ng/g; 22%), di-n-butyl phthalate (DBP; 184 ng/g; 15%), and dimethyl phthalate (63 ng/g; 5.0%). The mean sediment concentration of ∑PAEs in the Hangzhou Bay (1623 ng/g) was higher than that in the Taizhou Bay (1282 ng/g) and Wenzhou Bay (1185 ng/g). Concentrations of diethyl phthalate, DiBP, and DBP were significantly and positively correlated with one another in sediment from Taizhou Bay and Wenzhou Bay. The estimated inventories of ∑PAEs in sediment from Hangzhou Bay, Taizhou Bay, and Wenzhou Bay were 82 tons, 28 tons, and 26 tons, respectively. Overall, this study provides the first data on the occurrence of PAEs in sediment from the East China Sea, which is necessary to conduct the PAE exposure risk assessment for the marine benthos.
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- 2020
22. Occurrence, bioaccumulation and potential risk of polyhalogenated carbazoles in marine organisms from the East China Sea
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Yuanming Guo, Yongdong Zhou, Hongmei Hu, Wenbin Zhu, Meirong Zhao, Hangbiao Jin, and Tiejun Li
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Aquatic Organisms ,China ,Food Chain ,Environmental Engineering ,Chemistry ,Potential risk ,Biomagnification ,Carbazoles ,Fishes ,Bioconcentration ,Bioaccumulation ,Pollution ,Zooplankton ,Shrimp ,Environmental chemistry ,Animals ,Environmental Chemistry ,Waste Management and Disposal ,Water Pollutants, Chemical ,Shellfish ,Environmental Monitoring ,China sea - Abstract
As well-known emergent environmental contaminants, polyhalogenated carbazoles (PHCZs) have recently received increasing attention. In this study, we investigated the concentrations of carbazole (CZ) and PHCZs in 70 marine organisms from the East China Sea (ECS). CZ and 9–11 PHCZs were detected in organisms from the ECS, with concentrations in the range of 0.75–33 ng/g lipid weight, lw and 4.3–113 ng/g lw, respectively. Among the PHCZs, there were 3–4 major components in zooplankton, fish, shrimp, crabs, snails and shellfish, and the sum of these major components accounted for 59% to 67% of ∑PHCZs. The bioaccumulation potentials of 1,3,6,8-tetrachlorocarbazole (1368-CCZ) and 3-chlorocarbazole (3-CCZ) from water were observed. The logarithmic bioaccumulation factor (logBAF) values of the CZ and PHCZs increased significantly with increasing logKOW values (R = 0.449–0.784, p
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- 2022
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23. Spatiotemporal variation and potential risks of seven heavy metals in seawater, sediment, and seafood in Xiangshan Bay, China (2011–2016)
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Zhengbiao Lu, Quan Zhang, Ximing Wang, Guang Shen, Binfeng Zhao, Hangbiao Jin, Yiming Cao, Chang Yu, and Huiqiang Feng
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China ,Geologic Sediments ,Environmental Engineering ,010504 meteorology & atmospheric sciences ,Health, Toxicology and Mutagenesis ,010501 environmental sciences ,Risk Assessment ,01 natural sciences ,Metals, Heavy ,medicine ,Animals ,Humans ,Environmental Chemistry ,Seawater ,Child ,0105 earth and related environmental sciences ,Ecology ,biology ,Public Health, Environmental and Occupational Health ,Sediment ,Heavy metals ,General Medicine ,General Chemistry ,Seasonality ,Contamination ,medicine.disease ,biology.organism_classification ,Pollution ,Ostreidae ,Bays ,Seafood ,Environmental chemistry ,Environmental science ,Kendall test ,Seasons ,Bay ,Water Pollutants, Chemical ,Environmental Monitoring - Abstract
The residues and risks of heavy metals in the environment and organisms have attracted great concern for many years. However, the information on their long-term spatiotemporal trends and potential health and ecological risks are scarce. In this study, a total of 1815 seawater samples, 451 sediment samples, and 54 seafood samples were collected in Xiangshan Bay, China, between 2011 and 2016. The residue, distribution, seasonal variation, and potential health risks of seven heavy metals in seawater, sediment, and seafood were evaluated. Dissolved Zn (mean = 16.8 μg L−1) and Cu (mean = 3.4 μg L−1) concentrations were high in seawater. Sediments were mainly contaminated by Zn (mean = 120.8 mg kg−1) and Cr (mean = 81.7 mg kg−1). The highest levels of Cu and Zn were observed in Ostreidae with the concentrations of 84.3 and 99.0 mg kg−1, respectively. The Kendall test indicated that only As, Cu, Cd, and Hg showed decreasing trends in seawater with time and no significant temporal trends were identified for heavy metals in sediment between 2011 and 2016. Only As may pose non-carcinogenic risks to both adults and children in some seafood. These data provide a reliable reference for government to use in developing reasonable and scientific regulations on the ecological and food safety of this area.
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- 2018
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24. Occurrence of phthalic acid esters in marine organisms from Hangzhou Bay, China: Implications for human exposure
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Hongmei Hu, Jiahui Xie, Shuhong Fang, Meirong Zhao, Hangbiao Jin, and Lingling Mao
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Adult ,Aquatic Organisms ,China ,Environmental Engineering ,010504 meteorology & atmospheric sciences ,Phthalic Acids ,010501 environmental sciences ,01 natural sciences ,chemistry.chemical_compound ,Environmental Chemistry ,Animals ,Humans ,Child ,Waste Management and Disposal ,Shellfish ,0105 earth and related environmental sciences ,Phthalate ,Esters ,Pollution ,Hazard quotient ,Dibutyl Phthalate ,Shrimp ,Phthalic acid ,chemistry ,Bays ,Human exposure ,Environmental chemistry ,%22">Fish ,Bay - Abstract
Owing to the wide application of phthalic acid esters (PAEs) in the manufacturing of plastic products, they are ubiquitous in the marine environment. However, the occurrence of various PAEs in marine organisms from China has not been well characterized. In this study, 341 marine organism samples (including fish, shrimp, crab, and shellfish) were collected from Hangzhou Bay, China and analyzed for 16 PAEs. Further, the human PAE exposure risks raised from the consumption of marine organisms were evaluated for adults and children. In total, eight PAEs were detected in collected organism samples, with the concentration of total PAEs (∑PAEs) ranging from 64 to 2840 ng/g (mean 238 ng/g). Crab (mean 811 ng/g) samples had the highest mean concentration of ∑PAEs, followed by fish (465 ng/g), shrimp (293 ng/g), and shellfish (261 ng/g) samples. Among detected PAEs, di-isobutyl phthalate (DiBP), di-n-butyl phthalate (DBP), and di-ethylhexyl phthalate (DEHP) were the predominant PAEs, and they collectively accounted for 84-97% of the ∑PAEs concentrations in all samples. The estimated daily intakes of DiBP, DBP, and DEHP were more than one order of magnitude higher than remaining PAEs. Calculated hazard quotient values of PAEs were all0.1, suggesting non-cancer risks for the general population through the consumption of marine organisms. Overall, for the first time, this study systematically examined the occurrence of multiple PAEs in four types of marine organisms from Hangzhou Bay, China.
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- 2019
25. Occurrence and partitioning of polyhalogenated carbazoles in seawater and sediment from East China Sea
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Nan Zhao, Hongmei Hu, Meirong Zhao, Weiping Liu, and Hangbiao Jin
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China ,Geologic Sediments ,Environmental Engineering ,Ecological Modeling ,0208 environmental biotechnology ,Carbazoles ,Sediment ,02 engineering and technology ,010501 environmental sciences ,Spatial distribution ,01 natural sciences ,Pollution ,020801 environmental engineering ,Persistence (computer science) ,Environmental chemistry ,Environmental science ,Seawater ,Waste Management and Disposal ,Water Pollutants, Chemical ,Environmental Monitoring ,0105 earth and related environmental sciences ,Water Science and Technology ,Civil and Structural Engineering ,China sea - Abstract
Polyhalogenated carbazoles (PHCZs) have received great concern due to their environmental persistence and potential dioxin-like toxicities. Their presence in the marine sediment had been well characterized, but limited studies had investigated their environmental behaviors in the marine environment. In this study, we collected paired seawater (n = 48) and surface sediment samples (n = 48) from East China Sea and analyzed for carbazole (CZ) and 11 PHCZs to investigate the occurrence and spatial distribution of CZ and PHCZs in seawater and sediment, as well as to explore the partitioning behaviors of CZ and PHCZs between seawater and sediment. In seawater samples, CZ and nine PHCZs were detected, with the concentrations of ∑PHCZs ranging from 0.21 to 11 ng/L (mean 2.7 ng/L). CZ (94%), 3-CCZ (89%), 1368-CCZ (65%), and 36-CCZ (57%) had relatively higher detection frequencies. Among PHCZs, 36-CCZ (mean 1.1 ng/L) had the highest mean seawater concentration, followed by 3-CCZ (0.51 ng/L) and 1368-CCZ (0.19 ng/L). In sediment, CZ and 11 PHCZs were detected, with the concentrations of ∑PHCZs ranged from 0.34 to 2.0 ng/g (mean 1.0 ng/g). CZ, 3-CCZ, 3-BCZ, 36-CCZ, 27-BCZ, and 36-BCZ were measurable in all sediment samples, and 36-CCZ was the predominant PHCZ (0.47 ng/g, 0.025-1.1 ng/g), followed by 1368-BCZ (0.16 ng/g,LOD-0.29 ng/g) and 3-BCZ (0.11 ng/g, 0.016-0.33 ng/g). This study first calculated the field-based log K
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- 2021
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26. Occurrence and partitioning of bisphenol analogues in water and sediment from Liaohe River Basin and Taihu Lake, China
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Lingyan Zhu and Hangbiao Jin
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China ,Bisphenol A ,Environmental Engineering ,Bisphenol ,Bisphenol F ,0211 other engineering and technologies ,Drainage basin ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,chemistry.chemical_compound ,Phenols ,Rivers ,Benzhydryl Compounds ,Polycarbonate ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Water Science and Technology ,Civil and Structural Engineering ,Hydrology ,021110 strategic, defence & security studies ,geography ,geography.geographical_feature_category ,Ecological Modeling ,Water ,Sediment ,Pollution ,Lakes ,chemistry ,Bisphenol S ,Aquatic environment ,visual_art ,Environmental chemistry ,visual_art.visual_art_medium - Abstract
Bisphenol analogues are widely used in the manufacture of polycarbonate plastics and epoxy resins, and the demand and production capacity of these compounds are growing rapidly in China. The occurrence and distribution of bisphenol analogues other than bisphenol A (BPA) in the aquatic environment is still poorly understood. In this study, nine bisphenol analogues were measured in water and sediment samples from Taihu Lake (TL), Liaohe River basin, including Liaohe River (LR) and Hunhe River (HR), China. Water samples from LR and HR contained much higher total bisphenols (∑BPs) concentrations. BPA and bisphenol S (BPS) were predominant with a summed contribution of 55, 75, and 75% to the ∑BPs in TL, LR, and HR waters, respectively. This suggests that BPA and BPS were the most widely used and manufactured bisphenols in these regions. In sediment, BPA was always predominant, with the next abundant compound bisphenol F (BPF) in TL and HR sediment, but BPS in LR sediment. The average field sediment–water partitioning coefficients (log K oc ) were calculated for the first time for certain bisphenols and were determined to be 4.7, 4.6, 3.8, 3.7, and 3.5 mL/g for BPF, BPAP, BPA, BPAF, and BPS, respectively.
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- 2016
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27. Spatial-temporal distribution of microplastics in surface water and sediments of Maozhou River within Guangdong-Hong Kong-Macao Greater Bay Area
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Chunmiao Zheng, Yunsong Liu, Siqing Wang, Yuanyuan Tang, Hao Jing, Pengfei Wu, Hangbiao Jin, Zongwei Cai, Miao Dang, and Shuping Yi
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Wet season ,geography ,Microplastics ,Environmental Engineering ,geography.geographical_feature_category ,010504 meteorology & atmospheric sciences ,Sediment ,010501 environmental sciences ,engineering.material ,01 natural sciences ,Pollution ,Oceanography ,Tributary ,Dry season ,engineering ,Environmental Chemistry ,Environmental science ,Waste Management and Disposal ,Bay ,Pearl ,Surface water ,0105 earth and related environmental sciences - Abstract
Concerns over the negative impacts of microplastics on human health have led to growing attention on the occurrence of microplastics in aquatic environment. Recent studies have extended their focus from marine to inland waters, especially on the spatial-temporal distribution of the microplastics in urban rivers. In this study, Maozhou River, the largest river in Shenzhen, a tributary of the Pearl River, was selected as a representative inland waterway of Guangdong-Hong Kong-Macao Greater Bay Area. The spatial-temporal investigation was performed on microplastics in the surface water and sediments of 17 sites along the mainstream of the Maozhou River. Results show that microplastics were widely and unevenly distributed along the river and reached the high abundances on the site most intensively surrounded by industries as well as the sites downstream. The abundances in dry season ranged from 4.0 ± 1.0 to 25.5 ± 3.5 items·L−1 in water and 35 ± 15 to 560 ± 70 item·kg−1 in sediments, which were relatively higher than those observed in the wet season (water: 3.5 ± 1.0 to 10.5 ± 2.5 items·L−1; sediments: 25 ± 5 to 360 ± 90 item·kg−1; p value
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- 2020
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28. Poly- and perfluoroalkyl substance concentrations in human breast milk and their associations with postnatal infant growth
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Jie Wen, Lingling Mao, Pengfei Wu, Jiahui Xie, Hangbiao Jin, Xiaoxia Bai, Meirong Zhao, and Tao Shen
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China ,Environmental Engineering ,010504 meteorology & atmospheric sciences ,Carboxylic Acids ,Physiology ,010501 environmental sciences ,Breast milk ,01 natural sciences ,chemistry.chemical_compound ,Lactation ,medicine ,Animals ,Humans ,Environmental Chemistry ,Postnatal growth ,Fluorotelomer ,Waste Management and Disposal ,Human breast milk ,0105 earth and related environmental sciences ,Fluorocarbons ,Milk, Human ,Infant ,Pollution ,Perfluorooctane ,medicine.anatomical_structure ,chemistry ,Female ,medicine.symptom ,Weight gain ,Environmental Monitoring - Abstract
Perfluoroalkyl carboxylates (PFCAs) and perfluoroalkyl sulfonates are widespread in human breast milk. However, the occurrence of chlorinated polyfluorinated ether sulfonates (Cl-PFESAs) and fluorotelomer alcohols (FTOHs) in breast milk and their effects on postnatal growth of infants through breast milk consumption are still not well known. This study characterized the occurrence of 16 poly- and perfluoroalkyl substances (PFASs) in breast milk from 174 women in Hangzhou, China and investigated the association between lactation exposure to these PFASs through breast milk consumption and the postnatal growth of infants. Our results showed that perfluorooctanoate (mean 87 pg/mL) was the predominant PFAS in breast milk, followed by perfluorohexanoate (41 pg/mL), 6:2 Cl-PFESA (28 pg/mL), and perfluorooctane sulfonate (25 pg/mL). The occurrence and levels of Cl-PFESAs in Chinese breast milk were firstly reported in the current study. The 8:2 and 10:2 FTOH were detected in half of breast milk samples, with the mean concentration of 9.0 pg/mL and 10 pg/mL, respectively. Breast milk concentrations of C8-C10 PFCAs and 6:2 Cl-PFESA were negatively correlated with infant's length gain rate. Exposed to higher levels of 8:2 FTOH were correlated with decreased infant's weight gain rate. Daily intakes of PFASs via the consumption of breast milk were calculated for infants. Overall, this study firstly demonstrated that lactation exposure to C8-C10 PFCAs, 8:2 FTOH, and 6:2 Cl-PFESA through breast milk consumption may affect the postnatal growth of infants.
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- 2020
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29. Airborne Trifluoroacetic Acid and Its Fraction from the Degradation of HFC-134a in Beijing, China
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Hangbiao Jin, Keding Lu, Zihan Zhai, Jianxin Hu, Li Li, Jianbo Zhang, Jing Wu, Jonathan W. Martin, and Xuekun Fang
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Environmental engineering ,Fraction (chemistry) ,General Chemistry ,Mass spectrometry ,Collection system ,chemistry.chemical_compound ,Deposition (aerosol physics) ,chemistry ,Beijing ,Environmental chemistry ,Trifluoroacetic acid ,Environmental Chemistry ,Degradation (geology) ,Environmental science ,Derivatization - Abstract
Trifluoroacetic acid (TFA) has been attracting increasing attention worldwide because of its increased environmental concentrations and high aquatic toxicity. Atmospheric deposition is the major source of aquatic TFA, but only a few studies have reported either air concentrations or deposition fluxes for TFA. This is the first study to report the atmospheric concentrations of TFA in China, where an annular denuder and filter pack collection system were deployed at a highly urbanized site in Beijing. In total, 144 air samples were collected over the course of 1 year (from May 2012 to April 2013) and analyzed directly using high-performance liquid chromatography–tandem mass spectrometry (HPLC-MS/MS) or following derivatization by gas chromatography–mass spectrometry (GC–MS). The annual mean atmospheric concentration of TFA was 1580 ± 558 pg/m3, higher than the previously reported annual mean levels in Germany and Canada. For the first time, it was demonstrated that maximum concentrations of TFA were frequen...
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- 2014
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30. Preliminary Study of Purification for Livestock Wastewater of Immobilized Microcystis Aeruginosa
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Hangbiao Jin, Minghao Fan, Yingjun Wang, and Peng Gao
- Subjects
biology ,Chemistry ,Environmental engineering ,Treatment method ,Pulp and paper industry ,biology.organism_classification ,Polyvinyl alcohol ,chemistry.chemical_compound ,Wastewater ,Polyvinyl Alcohol ,Livestock wastewater ,General Earth and Planetary Sciences ,Microcystis aeruginosa ,Sodium alginate ,General Environmental Science - Abstract
Immobilized microcystis aeruginosa was applied in purifying different concentration of livestock wastewater, of which removal ability to NH4+-N, TP and CODCr was investigated in this study. Sodium alginate (SA) and polyvinyl alcohol (PVA) were chosen as different entrapment agents. The results showed that with SA embedded in microcystis aeruginosa, the removal rate of NH4+-N, TP and CODCr to high-concentration wastewater reached 90.77%, 76.10%, 70.13% separately. While the removal efficiency went down along with low-concentration wastewater, which was 82.37% NH4+-N, 67.59% TP, 67.45% CODCr. PVA entrapped microcystis aeruginosa was inferior to SA, reaching removal of up to 77.41% NH4+-N, 69.02% TP, 55.07% CODCr for high-concentration wastewater. Treating low-concentration wastewater with PVA showed worst efficiency among the above agents. This study showed immobilization of microcystis aeruginosa in SA gel beads was more potential to serve as a treatment method for livestock wastewater.
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