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In order to promote the large-scale utilization of coal gangue in coal mine areas under high sulfate environment, this article prepared shotcrete with different coal gangue substitution rates, and studied the influence law of coal gangue on the sulfate attack resistance of shotcrete under the action of dry-wet cycles. The appearance, mass loss rate, relative dynamic elastic modulus, relative compressive strength, sulfate ion distribution evolution and micromorphology changes before and after erosion were studied, and the influence mechanism of coal gangue on the sulfate attack resistance of shotcrete was obtained. The results show that under the action of sulfate dry-wet cycles, the deterioration process of coal gangue shotcrete (CGS) is divided into three stages: strengthening stage, initial damage and macroscopic damage. The deterioration degree of CGS is synergistically affected by the number of dry-wet cycles and the substitution rate of coal gangue. The sulfate resistance of CGS increases at a substitution rate of 25% (mass fraction). When the substitution rate exceeds 25%, the sulfate attack resistance of CGS decreases with the increase of substitution rate. The research results provide important theoretical support for the application of CGS structures in mines. [ABSTRACT FROM AUTHOR]

Copyright of Acta Scientiarum Naturalium Universitatis Pekinensis is the property of Editorial Office of Acta Scientiarum Naturalium Universitatis Pekinensis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The characteristics and hazards of acid coal mine drainage (ACMD) were introduced, and the treatment methods of ACMD were described. Techniques that could be used for source prevention and process containment were analyzed. The widely used terminal treatment technologies at present were summarized, such as the active treatment technology based on neutralization, sulfidation, adsorption and membrane technology, and the passive treatment technology based on chemical, biological and chemical-biological combined method. It was summarized and concluded that the multi-technology combination process was the main trend of engineering application and an effective way for large-scale collaborative treatment of ACMD. Finally, the development prospect of ACMD treatment method was prospected. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Based on environmental characteristics of reinforced concrete infrastructure in western China, cement mortar specimens were subjected to semi-immersed sulfate corrosion in low humidity and varying temperature. The influences of low humidity and varying temperature on semi-immersion sulfate attack cement-based materials were studied by combination of XRD, SEM, LF-NMR, and conductivity titration of sulfate ions. The results show that under low humidity and varying temperature, the mortar subjected to semi-immersion sulfate attack has a water film zone within 30 mm above the surface of sulfate solution, and the corrosion degree is relatively low. The evaporation zone above the solution surface of 30 ~ 60 mm has a higher degree of corrosion and obvious peeling phenomenon. Corrosion of evaporation zone of mortar semi-immersed in Na2SO4 solution is more seriously than that semi-immersed in MgSO4 solution due to their difference in saturation under different temperatures. The expansive salt crystallization within pores above 1 000 nm is prone to the occurrence in evaporation zone, which leads to the micro cracks inside mortar and an increase in the proportion of harmful pores, resulting in physical expansion damage being the main cause of this zone. Chemical corrosion in the immersion zone of mortar is dominant due to the formation of swelling corrosion products such as gypsum and ettringite. As corrosion products accumulated in the pores with pore sizes of 50 ~ 1 000 nm, the surface of mortar cracks and the proportion of macroscopic pores with pore sizes above 1 000 nm increases. The addition of ground granulated blast furnace slag in cement increases the sulfate corrosion resistance of the immersion zone of mortar via its secondary hydration effect, and the addition of limestone powder decreases the sulfate corrosion resistance of mortar due to its dilution effect. [ABSTRACT FROM AUTHOR]

The structure of the surfactant was characterized by infrared spectroscopy, and its low-temperature solubility, surface properties, emulsification properties and dispersion properties were measured by turbidity, drop volume, water splitting time and dispersion index methods. The effects of reaction temperature, reaction time, catalyst dosage and raw material ratio on the content of active substances in the products were investigated by the single-factor experimental method, and the optimum synthesis reaction conditions were determined. The results showed that under the conditions of reaction temperature of 100 °C, reaction time of 3 h, catalyst dosage of 1% of the total mass of the reactants and re(block polyether) : re(sulfamic acid) = 1:1.5, the content of active substances in the products reached 96.49%. [ABSTRACT FROM AUTHOR]

Copyright of South China Fisheries Science is the property of South China Fisheries Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Hydrometallurgy of China is the property of Hydrometallurgy of China Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Carsologica Sinica is the property of Institute of Karst Geology, CAGS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Carsologica Sinica is the property of Institute of Karst Geology, CAGS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Sulfate attack is an important factor affecting the durability of concrete. In order to further improve the sulfate attack resistance of high belite sulfate-aluminate cement (HB-CSA) based concrete, the granulated blast-furnace slag (GBFS) was added into HB-CSA to improve the sulfate attack resistance of HB-CSA. Corrosion resistance coefficient was used to evaluate the effect of slag on the sulfate attack resistance of HB-CSA mortar. Combined with X-ray diffraction analysis, thermogravimetry, mercury injection, scanning electron microscope and other testing methods, the mechanism of sulfate attack resistance was studied from the microscopic level. The results show that slag can improve the sulfate attack resistance of HB-CSA, and its corrosion resistance coefficient increases to 1. 51. In the process of GBFS-HB-CSA resistance to sulfate attack, slag particles play a major role in the filling and refining of the cement pore structure of HB-CSA. SO42- and Ca(OH)2 jointly stimulate the hydration of Al2O3 and SiO2 in the slag to produce gel and ettringite (AFt). The gel and AFt fill in the slurry pores to refine the pore size of the slurry, which makes the slurry structure dense and reduces the ionic permeability, thus improving the ability of HB-CSA to resist sulfate attack. [ABSTRACT FROM AUTHOR]

The biochar was prepared by the high temperature calcination, the biochar@ CoFe2O4 was hydrothermal synthesized, was further used to activate the peroxy monosulfate (PMS) to degrade the ciprofloxacin (CIP) in the water, and explored effect of different biochai/CoFe204 mass ratio, PMS concentration, CIP concentration in the degradation efficiency of CIP ・ Based on the above, the degradation mecha・ nism also investigated・ The obtained results presented the mass ratio of biochar/CoFe2O4 was 1: 1 with the PMS concentration of 0・ 25 g/L have excellent degradation efficiency between the 5 ~40 mg/L CIP solution. It could be reused over 5 times with excellent activated property for the PMS and the CIP degradation rate reached to 80. 0% ・ In the process of degradation, sulfate radicals produced by the PMS with activation of biochar@ CoFe2O4 was the main degradation route of CIP. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Organic wastewater containing ammonia nitrogen and sulfate was used as influent of UASB reactor (R1) and anaerobic sludge bed reactor (R2). The transformation pathway, transformation correlation and interaction of NH4 +-N and SO4 2- in the two reactors were studied. The results show that, under the condition of influent COD of 100 mg/L, the average NH4 +-N removal of R1 was 15 mg/L and the highest was 20 mg/L, while that of R2 was 10 mg/L and the highest was 15 mg/L during the continuous removal of SO4 2-. It is considered that the sulfate reduction and ammonium oxidation (SRAO) reaction in the reactor cooperates with ammonia oxidation, heterotrophic denitrification, heterotrophic sulfate reduction (SR) and sulfides oxidation to complete simultaneous denitrification and sulfate removal. And the transformation of NH4 +-N and SO4 2- showed a synchronous downward trend under the condition of lack of SO4 2-. When the influent COD was increased to 200 mg/L, the SR activity increased sharply and the denitrification capacity of the system was inhibited. However, the partial inhibition of SR activity by Na2MoO4 from 0.5 mmol/L to 1.5 mmol/L can effectively improve the denitrification capacity of the system. [ABSTRACT FROM AUTHOR]

Objective In view of the hydrogen sulfide problem in the production process of Jimusar shale oil, the cause of hydrogen sulfide was analyzed. Methods The isotopes of sulfur element, sulfate-reducing bacteria species and the reaction conditions of biological cause were analyzed. Results The experiment showed that the tormation reason of hydrogen sulfide in Jimusar shale oil was biological cause, the content of sulfate-reducing bacteria and sulfurate ions in the output fluid were positively correlated with the concentration of hydrogen sulfide at the wellhead. Three kinds of medium-temperature sulfate-reducing bacteria suitable for 30-40 ℃ were identified through 16 Sr RNA technology, and six kinds of high temperature sulfate-reducing bacteria suitable for 60-100 ℃ were also determined. They can grow normally under the conditions of temperatures of 35-100 ℃, mineralization of（0.2-8.0）×10~4 mg/L, and pH value of 4-9, which can meet the conditions of biological cause. Sulfate-reducing bacteria can multiply in large numbers by fracturing fluid and promote the formation of hydrogen sulfide. Conclusions Aiming at the biological cause, a process of replacing chemical sulfur remover with a fungicide was developed, and 8 wells were tested on site, the hydrogen sulfide concentration fell below the safety threshold, the cost of sulfur removal decreased by 40.9% compared with the same period, which provided a basis for effective treatment. [ABSTRACT FROM AUTHOR]

Copyright of Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective: This study aimed to explore the relationship between the structure and antioxidant activity of purified red date polysaccharide ZJP-1 and sulfated red date polysaccharide S-ZJP-1. Methods: Using remnant jujube as raw material, jujube poly-saccharide (ZJP-) was purified by hot water extraction, and then separated by DEAE-52 ion exchange chromatography and Sephadex-200 dextran gel column chromatography. Thereafter, red jujube polysaccharide sulfated derivative ( S-ZJP-1 ) was obtain through chlorosulfonic acid-pyridine sulfated modification. Results: Both ZJP- and S-ZJP-1 are composed of three monosacharides: glucose, arabinose, and galactose, but the ratios are different. The two polysaccharides had characteristic absorption peaks of polysaccharides, and S-ZJP-1 had characteristic absorption peaks of sulfate groups, indicating that the sulfation modification was successful. No triple helical structure was found in ZJP1 or S-ZJP1, while a sheet-like structure was detected. The results of the activity test confirmed that the polysaccharides ZJP-1 and S-ZJP-1 had significant scavenging activity on DPPH free radicals with reducing ability. When the mass concentration of the two kinds of polysaccharide was 0.5 mg/mL, the DPPH free radical scavenging activities were 40. 4% and 47. 6%, and the reducing ability is 0.419 and 0.531, respectively. Conclusion: The sulfate- modification jujube polysaccharide has higher antioxidant activity and is a good natural antioxidant. [ABSTRACT FROM AUTHOR]

Copyright of Hydrometallurgy of China is the property of Hydrometallurgy of China Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Separation of zinc and iron is a key factor in zinc hydrometallurgy. The residue produced by hematite process is stable and friendly to environment, so it has great application potential. The existing state and content of Fe and S in hematite precipitation process was studied in the system of ferrous sulfate and zinc sulfate. The results show that under the conditions of reaction temperature 185 ℃, oxygen partial pressure 0.4 MPa, rotation speed 600 r/min and seed dosage 25 g/L, the reaction time 3 h, increasing the reaction temperature from 170 ℃ to 200 ℃may effectively increase the iron content in the residue, reduces the binuclear coordination exchange adsorption between the sulfate radical and the surface of the hematite particles． Meanwhile, the dispersion between the hematite particles is enhanced, and the adsorption of sulfur between the particles is reduced. The S in the liquid after iron removal is in the form of SO42-. The reaction time is prolonged from 1 hto 3 h, the iron removal efficiency increases from 91.23% to 93.63%, and the products are allα-Fe2O3. In addition, Fe2+ is oxidized faster at the initial stage of reaction, so that part of Fe3+ in the solution is in a state of supersaturation, while attached to the spherical seeds at a faster nucleation rate and grow into spindle-shaped small particles. [ABSTRACT FROM AUTHOR]

Copyright of Hydrometallurgy of China is the property of Hydrometallurgy of China Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A kind of chitosan-based sulfate imprinted adsorption materials was prepared at laboratory scale by use of chitosan as the functional monomer and sulfate radicals as the imprinted ions, thereby the materials were characterized and then the static adsorption experiment was conducted for investigating the performance of adsorption of sulfate ions in water onto the materials. It was found that the copper ions within the materials were at first combined with both chitosan amino N atoms and para hydroxy O atoms, and the copper ions as a "medium", with which sulfate ions were recombined in the form of ion-pair. After the crosslinking sulfate radicals were removed and a spatial structure which matched sulfate ions formed; crosslinking and imprinting reactions greatly reduced the degree of crystallinity of chitosan and a kind of amorphous structure took shape. The adsorption equilibrium time for the adsorption of sulfate ions was 60 min; and the fitting results with the psedo-second-order dynamic model revealed the adsorption volume amounted to 63.21 mg/g. In conclusion, the printing technology and the spatial structure of matched sulfate ions considerably increased the anti-interference capability of sulfate ions adsorption onto the chitosan-based sulfate imprinted adsorption materials. [ABSTRACT FROM AUTHOR]

Copyright of Forest Research is the property of Forest Research Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Surfactant Detergent & Cosmetics (1001-1803) is the property of China Surfactant Detergent & Cosmetics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Jilin University (Science Edition) / Jilin Daxue Xuebao (Lixue Ban) is the property of Zhongguo Xue shu qi Kan (Guang Pan Ban) Dian zi Za zhi She and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Surfactant Detergent & Cosmetics (1001-1803) is the property of China Surfactant Detergent & Cosmetics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The content of 1,4-dioxane in narrow-distribution sodium fatty alcohol ether sulfate (narrow- distribution AES) was studied by using n(SO3):n(narrow-distribution fatty alcohol ether), sulfation temperature, volume fraction of SO3, storage time and neutralization temperature as single-factor variables on a laboratory device of sulfur trioxide falling film sulfation. The results showed that, the content of 1,4-dioxane in narrow-distribution AES would increase with the increase of excess SO3, sulfation temperature, volume fraction of SO3, storage time of narrow-distribution fatty alcohol ether, and neutralization temperature. [ABSTRACT FROM AUTHOR]

Mulching to conserve moisture has become an important agronomic practice in saline soil cultivation, and the effects of the dual stress of salinity and microplastics on soil microbes are receiving increasing attention. In order to investigate the effect of polyethylene microplastics on the microbial community of salinized soils, this study investigated the effects of different types (chloride and sulphate) and concentrations (weak, medium, and strong) of polyethylene (PE) microplastics (1% and 4% of the dry weight mass of the soil sample) on the soil microbial community by simulating microplastic contamination in salinized soil environments indoors. The results showed that:PE microplastics reduced the diversity and abundance of microbial communities in salinized soils and were more strongly affected by sulphate saline soil treatments. The relative abundance of each group of bacteria was more strongly changed in the sulphate saline soil treatment than in the chloride saline soil treatment. At the phylum level, the relative abundance of Proteobacteria was positively correlated with the abundance of fugitive PE microplastics, whereas the relative abundances of Bacteroidota, Actinobacteriota, and Acidobacteria were negatively correlated with the abundance of fugitive PE microplastics. At the family level, the relative abundances of Flavobacteriaceae, Alcanivoracaceae, Halomonadaceae, and Sphingomonasceae increased with increasing abundance of PE microplastics. The KEGG metabolic pathway prediction showed that the relative abundance of microbial metabolism and genetic information functions were reduced by the presence of PE microplastics, and the inhibition of metabolic functions was stronger in sulphate saline soils than in chloride saline soils, whereas the inhibition of genetic information functions was weaker than that in chloride saline soils. The secondary metabolic pathways of amino acid metabolism, carbohydrate metabolism, and energy metabolism were inhibited. It was hypothesized that the reduction in metabolic functions may have been caused by the reduced relative abundance of the above-mentioned secondary metabolic pathways. This study may provide a theoretical basis for the study of the effects of microplastics and salinization on the soil environment under the dual pollution conditions.

Using seaweed residue as raw material, the fucoidan sulfate was extracted by acid extraction. The extraction process conditions were optimized through single factor experiment and orthogonal experiment. In order to achieve the purification of the crude fucoidan sulfate, the optimal ethanol precipitation volume fraction was screened in combination with the Dische colorimetric method. The results showed that the optimal process conditions for extracting fucoidan sulfate from seaweed residue by acid extraction were HCl concentration 0.25 mol/L, extraction temperature 50 °C, extraction time 2 h, and material-liquid ratio 1 : 10. The extraction rate of crude fucoidan sulfate was 1. 9%. Combined with the Dische colorimetric method, the optimal ethanol precipitation volume fraction was 70%. At this time, the mass concentration of fucoidan sulfate reached the maximum, which was 3.12 µg/mL. [ABSTRACT FROM AUTHOR]

Two kinds of chitosan surfactants, dodecyl chitosan sulfate (D10CTS) and decyl chitosan sulfate (D12CTS) were synthesized by Schiff base reaction, reduction, sulfation and neutralization reaction. Their structures were identified by infrared spectroscopy (FT-IR), H NMR spectroscopy (¹H NMR), elemental analysis (EA), and thermogravimetric analysis (TGA). The results show that the degrees of alkylation are 0.77 and 0.52, and the degrees of sulfation are 1.35 and 1.79, respectively. Favourable surface activity and spreadability of D10CTS and D12CTS were evidenced by surface tension and contact angle measurements. The critical micelle concentrations (cmc) are 0.69 and 0.49 g/L, and the minimum surface tension γcmc are 39.50 and 35.75 mN/m, respectively. The target products possess certain foaming properties and emulsification performance. The surfactants are low-foaming and are expected to play a potential application in the field of cosmetics. [ABSTRACT FROM AUTHOR]

In this study, the degradation efficiency and mechanism of carbamazepine (CBZ), a typical emerging contaminant in water, in the UV/sulfite process were investigated. The effects of different concentrations of dissolved oxygen [ ρ (DO)] on the degradation of CBZ by UV-activated sulfite were investigated. Additionally, under a simulated natural water environment-controlled initial ρ (DO) of (8.0 ±0.2) mg·L -1 , the effects of different process parameters (sulfite dosages and reaction pH) and water environmental factors (the presence of HCO 3 - , Cl - , and humic acids) on the degradation of CBZ were comprehensively analyzed. The results showed that the UV/sulfite process efficiently degraded CBZ with a degradation rate of 85.3% during the 30 min reaction time and followed the pseudo-first order kinetic model with the constant of 0.055 7 min -1 . Using the electron spin resonance detection, reactive species quenching tests, and the competition kinetics, the sulfate radicals (SO 4 - ·) and hydroxyl radicals (·OH) in the UV/sulfite process were determined to be the main reactive species and were responsible for the degradation of CBZ with contribution rates of 43.9% and 56.1%, respectively. In addition, the degradation efficiency of CBZ decreased with the increasing concentration of HCO 3 - , and the presence of Cl - had little effect on the degradation of CBZ, whereas the presence of humic acids significantly inhibited the degradation of CBZ. Moreover, the accumulation of sulfate during the reaction was significantly lower than the limit of the Standard for Drinking Water (GB5749-2022). Additionally, the sulfite consumption rate constant was 0.004 4 min -1 , which was significantly lower than the degradation rate constant of CBZ, indicating that sulfite could be activated efficiently by UV light to degrade CBZ in water.

Copyright of China Surfactant Detergent & Cosmetics (1001-1803) is the property of China Surfactant Detergent & Cosmetics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Surfactant Detergent & Cosmetics (1001-1803) is the property of China Surfactant Detergent & Cosmetics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Simulation experiment was performed on the performance of concrete exposed to sulfate attack and dry-wet cycles. Changes in ultrasonic velocity and acoustic emission activities for concrete at different erosion periods were tested by uniaxial compression test. The damage mechanism was analyzed by environmental scanning electron microscopy (ESEM), energy-dispersive X-ray analysis (EDX) and X-ray diffraction (XRD). The results show that at the beginning of loading for concrete after 60 d and 80 d erosion, the specimen exhibits a significant compaction phase. The longer the concrete is exposed to sulfate attack and dry-wet cycles, the earlier the sudden drop in ultrasonic velocity occurs. For concrete after 40 d erosion, the active zone of acoustic emission is narrow during the loading process. The problems of stress concentration and a sudden release of energy tend to occur at the weak position caused by erosion in concrete, and a sharp increase in acoustic emission events appears in advance under sulfate attack. By means of a mathematical model, the damage model of concrete was established based on the cumulative ring-down count of acoustic emission as a variable, which reveals the relations of sulfate attack, load and damage for concrete in complex underground environments. During erosion time, the expansions caused by ettringite and gypsum and the swelling of sodium sulfate crystallization result in the evolution of micro-destruction, leading to the different macroscopic properties of corroded concrete.

The aim of this study was to explore the effects of different sulfur fertilizers combined with sulfate-reducing bacteria on the accumulation of cadmium and arsenic in rice and the formation of iron plaque under long-term flooding conditions and to provide a reference for the safe production of rice fields polluted by moderate and mild cadmium and arsenic. We adopted a pot experiment, selecting two sulfur fertilizers, sulfur and calcium sulfate, and Enterobacter M5 with sulfate-reducing ability, and designed six treatments of single application and combined application of different sulfur fertilizers and M5. The results showed that the combined application of calcium sulfate and M5(CM5) had the best effect on reducing available cadmium and arsenic in rice rhizosphere soil. The combined application of sulfur fertilizer or M5 could reduce the content of cadmium and inorganic arsenic in early season rice grains by 8%-51% and 42%-61%, respectively, under flooding conditions. The content of cadmium and inorganic arsenic in late rice grains decreased by 81%-92% and 41%-62%, respectively. The treatment of the combined application of sulfur and M5(SM5) and CM5 had the best effect on reducing cadmium and arsenic content in both early and late season rice grains. SM5 and CM5 could promote the adsorption of cadmium and arsenic by iron plaque, and the extracted cadmium and arsenic content of ACA in both treatments was significantly higher than that of CK. The extracted iron content of ACA in the CM5 treatment was also significantly higher than that of CK, which indicates that the combined application of calcium sulfate and M5 would promote the formation of iron plaque. The results showed that the combined application of sulfur fertilizer and M5 was better than single application in reducing the content of cadmium and arsenic in grains, whereas the combined application of calcium sulfate and M5 was the best and most stable method.

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The macro-performance variation in parameters, including mass, ultrasonic velocity, compressive strength and stress-strain curves, was compared through some experiments between the concrete with barium hydroxide reagent and without reagent under typical sulfate attack conditions. The microstructure and corrosion products component were studied using various microcosmic test methods such as scanning electron microscopy, energy dispersion spectrum analysis, X-ray diffraction and thermogravimetry-differential thermal analysis. The mechanism of barium hydroxide reagent on the sulfate corrosion process of concrete was researched. The research results show that: ① The rate of erosion and degeneration of the concrete with barium hydroxide reagent extremely decrease by contrast. The change of mass and ultrasonic velocity decreases less. Compared with the strength before sulfate attack, at 300-day corrosion age the strength of concrete without and with barium hydroxide is decreased by 17% and 3%, respectively. Barium hydroxide reduces the effect of sulfate attack. ② Compared with the common concrete, at the same corrosion time the microstructure of concrete with barium hydroxide is denser and the contents of corrosion products such as ettringite and gypsum are lower with the production of barium sulfate. As corrosion time goes on, the corrosion products content of concrete with barium hydroxide decreases significantly compared with the common concrete. ③ The barium sulfate and ettringite formation reactions exist simultaneously in the concrete with barium hydroxide and there is a competitive relationship between these two reactions. Sulfates reacts with barium hydroxide preferentially and comes out as barium sulfate sediment. The deposited barium sulfate blocks the formation pore space and reduces sulfate solution permeability, which delays the corrosion reaction. [ABSTRACT FROM AUTHOR]

The dry-wet cycle method is adopted to study sulfate resistance of standard cubic plain concrete and hybrid fiber concrete specimens (150mm×150mm×150mm). The anti-sulfate corrosion performance is tested at the erosion age of 0， 30， 60， 90， 180， 210 days with sodium sulfate erosion solution concentrations of 800 and 6000mg/L. The results show that when the erosion age is 210 days， corresponding to concentrations of 800 and 6000mg/L， compressive strength of plain concrete decreases by 5.6% and 10.0% and splitting tensile strength decreases by 3.0% and 5.1% respectively. Compressive strength of hybrid fiber concrete decreases by 4.0% and 6.3% and splitting tensile strength decreases by 0.51% and 3.8% respectively. When erosion depth comes to 1.5mm， SO2-4 concentrations of plain concrete are 0.83% and 1.03%， while hybrid fiber concrete are 0.79% and 1.0% respectively. [ABSTRACT FROM AUTHOR]

The article presents a study which investigates the behavior and mechanism of HR3C for high temperature resistance from sulfate corrosion. Alkali metal sulfate deposits at 750 °C had been used. Experimental results indicate that the corrosion kinetic curve of HR3C are divided into two stages, the high temperature oxidation and the curve that grows due to the formation of Cr2O3 oxide film due to alkali metal sulfate.

Objective: To analyze the salivary metabolic profile of patients with periodontitis through metabolomic techniques and to explore the metabolic patterns associated with periodontal diseases., Methods: Liquid chromatography/mass spectrometry (LC/MS) technique in conjunction with principal component analysis (PCA) analysis and orthogonal partial least squares identification (OPLS-DA) method was used to study the metabolomics of saliva samples from gingivitis patients, periodontitis patients, and healthy controls, with 10 samples for each group. We examined the correlation between migration in metabolic profile and the progression of periodontal diseases., Results: Saliva metabolite profiles of gingivitis and periodontitis patients was significantly different from those of the healthy controls. Significant differences were identified between the different groups for eight salivary metabolites, including arachidonic acid, tyramine, L-arginine, thymine, N-acetylgalactosamine sulfate, prostaglandin E2, L-phenylalanine, and 5-aminoimidazole-4-carboxamide-riboside (AICAR). In comparison with those of the health controls, the concentration of AICAR in patients with gingivitis and periodontitis was lower and the metabolic trend was down-regulated, while the other metabolites were up-regulated., Conclusion: Salivary metabolic profile changes along with the progression of periodontal diseases. Abnormal metabolism of the periodontal tissue and of pathogenic microorganisms related to periodontal diseases is one of the mechanisms involved in the pathogenesis, development and prognosis of periodontal diseases., (Copyright© by Editorial Board of Journal of Sichuan University (Medical Sciences).)

To study the effect of Fe2(SO4)3 as flocculant on microbial activity of activated sludge, Fe2(SO4)3 in dosages of 20,40,60,80,100 mg · L-1 was dropped into ASS and four hours latter DHA, RSOU and EPS content were examined as well as COD et al. The results showed that DHA, RSOU and EPS content were insensitive to Fe2(SO4)3 in range of 20-60 mg · L-1, and the removal rates of COD, TP and UV254 in effluent increased greatly with the concentration of Fe2(SO4)3 increased. When the concentration of Fe2(SO4)3 was 80 mg · L-1, DHA, RSOU and EPS content decreased distinctly. When the concentration of Fe2(SO4)3 was 100 mg · L-1, DHA and RSOU were inhibited further, whereas total EPS content increased greatly. Meanwhile the removal rates of COD, TP and UV254 in effluent increased slowly, and the removal rates of SCOD and NH3-N tended to decline. [ABSTRACT FROM AUTHOR]

In order to improve the ability of deep underground structure to resist erosion in underground complex environment, a accelerated corrosion test of high performance concrete (HPC) with water-binder ratio (w/b) of 0. 35, 0.32,0. 30,0. 28 and 0.26 was done in sodium sulfate solution. The cement was taken from Huaihai Cement Plant with the grade of 525 and the admixtures include silica powder and fly ash which was taken from Tongshan Plant. Physical and mechanical performance time-changing laws of HPC and the corresponding influencing factors, including corrosion solution concentration, w/b and stress state were studied. The test results show that the strength of HPC increases in early corrosion and then declines, while the quality decreases in preliminary stage and then increases. The higher corrosion solution concentration, the quicker compressive strength reduction, and the later the turning point time between declining and rising stage. The influence of corrosion on compressive strength of HPC with the w/b less than 0.28 is little, and with the increasing of w/b, the slopes in both the declining and rising phases add. The long-term strength change laws of HPC in four different kinds of stress state are consistent with the ones without stress. But they also have differences: sulfate corrosion has little impact on the strength and quality when stress ratio is less than 0.3, while the stress ratio reaches more than 0. 5, the influence is bigger. [ABSTRACT FROM AUTHOR]

To investigate the deteriorating process of reinforced concrete beams corroded by sulfate, the section analysis method and fractal theory were employed to analyze and calculate the ductility of the corroded beams respectively. According to the corrosion mechanism of the concrete and reinforcing steel in sulfate environment, the normal assumption of plane section behavior was proved to hold true. The available ductility of corroded doubly reinforced concrete beam sections with a range of reinforcement corrosion and concrete degradation was discussed. Based on the mechanical test of corroded beams, a simplified expression is put forward to predict the ductility factor for the beams corroded by sulfate. Relationship! between the fractal dimension and the ductility factor of the corroded beams is achieved. [ABSTRACT FROM AUTHOR]

Objective: To analyze the clinical data of acute copper sulphate poisoning, and discuss the timing and prognosis of the treatment. Methods: The clinical data of a case of acute copper sulphate poisoning treated in Yantaishan Hospital in May 2020 were analyzed, and CNKI, Weipu database and Wanfang database were retrieved with "copper sulfate""poisoning" and "blood purification" as search terms respectively. Such as "copper sulphate/cupric sulfate""poisoning" and "blood purification " were respectively tested in the PubMed database and reviewed the literatures. Results: The patient was admitted to hospital due to "oral copper pentahydrate for 14 h". Plasma exchange and continuous venous hemofiltration were performed on the 2nd day of poisoning, and the liver enzymes and creatinine indexes were normal. The patient recovered and left the hospital after 10 days. After literature retrieval, 13 literatures were screened out, a total of 14 cases were reported. All recovered after blood purification, copper displacement and liver protection. Conclusion: When acute copper sulphate poisoning occurs with multiple organ function damage mainly caused by hemolysis and kidney injury, the treatment with blood purification has a good prognosis while removing copper and organ support.

The particulate matter emitted from coal-fired power plants includes condensable particulate matter(CPM) and filterable particulate matter(FPM). By analyzing the concentration of SO 4 2- and NO 3 - components of CPM and FPM in the inlet/outlet of wet flue gas desulfurization(WFGD) and the outlet of wet electrostatic precipitator(WESP) from 7 ultra-low emission coal-fired power plants, the variation laws and transformation characteristics were investigated. The results showed that the concentration of SO 4 2- and NO 3 - of CPM decreased after WFGD, with reduction rates of 43.12%-86.84% and 17.99%-91.58%, respectively, which were different from the conversion trend of FPM. The concentrations of SO 4 2- and NO 3 - of CPM increased after WESP, with reduction rates of 21.05%-424.65% and 13.51%-298.37%, respectively, which were also different from that of FPM. In the WFGD system, CPM could be transformed into FPM due via condensation and aggregation under the decreasing temperature and increasing of humidity of the flue gas. In the WESP system, SO 2 and NO 2 in the flue gas combine with water vapor in a redox reaction, which promotes the generation of SO 4 2- and NO 3 - in CPM through synergistic action.