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Organic peroxyl radicals from biacetyl accelerated the visible-light degradation of steroid estrogens in aqueous solution

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Chemosphere 2024年 351卷 141195页

作者： Jia, Yulu Zhang, Chengyang Zheng, Hongcen Zhang, Guoyang Zhang, Shujuan State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China

Indirect photodegradation is an important pathway for the reduction of steroid estrogens in sunlit surface waters. Nevertheless, the kinetics and mechanisms governing the interaction between coexisting carbonyl compounds and estrogens under visible light (Vis) remain unexplored. This study systematically investigates the Vis-induced photodegradation of 1.β-estradiol (E2) in the presence of five specific carbonyl compounds—biacetyl (BD), acetone, glyoxal, pyruvic acid, and benzoquinone. The results demonstrate that, among these compounds, only BD significantly enhanced the photodegradation of E2 under Vis irradiation (λ > 400 nm). The pseudo-first order photodegradation rate constants (k1. of E2 in the Vis/BD system were 0.025 min−1.and 0.076 min−1.in ultrapure water and river water, respectively. The enhancing effect of BD was found to be pH-dependent, increasing the pH from 3.0 to 1..0 resulted in a 76% reduction in the k1.value of E2 in the Vis/BD system. Furthermore, the presence of humic acid, NO3−, or HCO3− led to an increase of more than 35% in the k1.value of E2, while NO2− exerted a pronounced inhibitory effect, resulting in a 92% decrease. Peroxyacetyl and peroxymethyl radicals, derived from BD in a yield ratio of 9, played a crucial role in the degradation of E2. These peroxyl radicals primarily targeted electron-rich hydroxyl sites of E2, initiating hydroxylation and ring-opening reactions that culminated in the formation of acidic byproducts. Notably, toxicity evaluation indicates that these hydroxylated and acidic products exhibited lower toxicity than the parent compound E2. This study highlights the important role of peroxyl radicals in estrogen degradation within aquatic environment, and also helps to design efficient visible light-responsive photo-activators for the treatment of estrogen-contaminated waters. © 2024 Elsevier Ltd

关键词： Photolysis

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Reproductive Toxicities of Tetradecyltrimethylammonium Chloride and Tetradecyltrimethylammonium Bromide on Caenorhabditis elegans over Four Consecutive Generations

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Chemical Research in Chinese Universities 2024年第6期40卷 1060-1067页

作者： ZHANG Jing DING Ruoqi YU Zhenyang Ecological Technique and Engineering College Shanghai Institute of TechnologyShanghai 201418P.R.China Jiaxing Tongji Institute for Environment Jiaxing 314051P.R.China State Key Laboratory of Pollution Control and Resource Reuse Key Laboratory of Yangtze River Water EnvironmentMinistry of EducationCollege of Environmental Science and EngineeringTongji UniversityShanghai 200092P.R.China

Quaternary ammonium compounds (QACs) become emerging pollutants and their toxicities earn increasing *** far,their reproductive toxicities were poorly investigated,and their effects over generations were even less *** the present study,reproductive toxicities of two QACs,i.e.,tetradecyltrimethylammonium chloride (TTAC);tetradecyltrimethylammonium bromide (TTAB) were studied on Caenorhabditis elegans with a consecutive exposure over four generations (from F1.to F4).The effects of TTAC on total and initial reproduction showed stimulation and inhibition,which oscillated from F1.to *** effects of TTAB on the total reproduction commonly showed stimulation over generations with the greatest stimulation in F2,and it inhibited the initial reproduction but stimulated the reproduction *** exploration demonstrated that TTAC and TTAB significantly disturbed the levels of spermatocyte protein 8 (SPE8);sperm transmembrane protein 9 (SPE9);vitellogenin (Vg);major sperm protein (MSP);ephrin receptor protein tyrosine kinase (VAB-1.;the expressions of vab-1.ceh-1.,set-2,met-2 and *** disturbances demonstrated that both QACs impacted the reproductive processes via oocyte meiosis,gonadal support and germline ***,the effects of TTAC and TTAB in parents were connected with those in the offspring,which highlighted the roles of reproduction in connecting *** addition,different effects between TTAC and TTAB demonstrated the anionic influences on the QACs’ toxicities.

关键词： Multigenerational effect Oocyte meiosis Gonadal support Germline development Anionic influence

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A novel structure of quasi-monolayered NiCo-bimetal-phosphide for superior electrochemical performance

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Journal of Energy Chemistry 2022年第11期31卷 203-211,I0007页

作者： Long Zhao Ming Wen Yakun Tian Qingsheng Wu Yongqing Fu School of Chemical Science and Engineering Shanghai Key Laboratory of Chemical Assessment and SustainabilityState Key Laboratory of Pollution Control and Resource ReuseTongji UniversityShanghai 200092China Faculty of Engineering and Environment Northumbria UniversityNewcastle upon TyneNE18STUnited Kingdom

Bimetallic transition metal phosphides(TMPs)as potential candidates for superior electrochemical performance are still facing great challenges in the controllable preparation of two-dimensional(2 D)structures with high aspect ***,a novel structure of quasi-monolayered NiCo-bimetal-phosphide(NiCoP)has been designed and successfully synthesized by the newly developed process combined with ultrasonic-cavitation and *** is the first time to break through the controllable preparation of 2 D bimetal-phosphides with a thickness of 0.98 nm in *** on the advantages of 2 D quasi-monolayer structure with dense crystalline-amorphous interface and the reconfigured electronic structure between Ni^(δ+)/Co^(δ+)and P^(δ-),the optimized Ni_(5%)CoP exhibits an outstanding bifunctional performance for electrocatalyzing both hydrogen evolution reaction and oxygen evolution reaction in an alkaline ***_(5%)CoP presents lower overpotentials and voltage of 84 mV&259 mV and1.48 V at the current density of 1. mA cm^(-2)for HER&DER and overall water splitting,respectively,which are superior to most other reported 2 D *** work provides a new strategy to optimize the performance of electrolytic water for bimetal-phosphates and it may be of significant value in extending the design of other ultrathin 2 D structured catalysts.

关键词： 2D quasi-monolayer Hydrogen evolution reaction Bimetal phosphide Oxygen evolution reaction Ultrasonic-cavitation

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A MISR-Based Method for the Estimation of Particle Size Distribution:Comparison with AERONET over China

Journal of Remote Sensing

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Journal of Remote Sensing 2023年第1期3卷 97-109页

作者： Yanchuan Shao Riyang Liu Weihan Li Jun Bi Zongwei Ma State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjingJiangsuChina Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET) Nanjing University of Information Science&TechnologyNanjingJiangsuChina

Aerosol particle size has a crucial impact on the environment and public *** satellite-based regression models focus on the total amount of particles and are limited by surface *** study proposes an algorithm to derive the long-term normalized volume size distribution(VSD)of aerosol particles,which is independent of ground *** size distribution and aerosol optical depth of Multi-angle Imaging SpectroRadiometer(MISR)components are *** find the estimated MISR VSD is consistent with Aerosol Robotic Network(AERONET)observations,with R=0.56,0.54,0.59,and 0.68 for daily,monthly,seasonal,and annual *** stratified validations of radius,stations,and years further confirm the stable performance of derived VSD(R=0.28 to 0.73).The application of the random forest model demonstrates the potential improvements of predicted VSD by 1.-fold cross-validation R=0.86 at the monthly *** apply MISR VSD to quantify the normalized volume of fractional aerosol particles at a resolution of 0.2°×0.2°during 2004 to 201. in *** also calculate the proportion of small and medium particles to indicate the contribution of anthropogenic *** highest ratios are concentrated in the northeastern regions especially during winter while relatively lower in the Taklamakan Desert of western *** case study demonstrates that the application of MISR data can yield valuable and resolved size distributions of aerosol particles.

关键词： AERONET aerosol MISR

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Coupling magnetic particles with flocculants to enhance demulsification and separation of waste cutting emulsion for engineering applications

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Journal of Environmental Sciences 2021年第7期33卷 173-183页

作者： Yongjiao Xiong Baoqiang Wu Xiangfeng Huang Chenlu Li Bin Lu Jia Liu Lijun Lu Shiyang Li Kaiming Peng College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource ReuseMinistry of Education Key Laboratory of Yangtze River Water EnvironmentShanghai Institute of Pollution Control and Ecological SecurityTongji UniversityShanghai 200092China

Magnetic particles were coupled with a flocculant to enhance the demulsification and separation of waste cutting *** optimal magnetic particle size and critical magnetic field conditions were investigated to achieve large-scale engineering application of magnetic demulsification separation for waste cutting emulsion *** micro-scale magnetic particles were found to show comparable effects to nano-scale magnetic particles on enhancing the demulsification and separation of cutting emulsions,which are beneficial for broadening the selectivity of low-cost magnetic *** critical magnetic separation region was determined to be an area 40 mm from the magnetic field *** to the flocculant demulsification,the magnetic demulsification separation exhibited a significant advantage in accelerating flocs-water separation by decreasing the separation time of flocs from 1.0-240 min to less than 1. min,compressing the flocs by reducing the floc volume ratio from 60%-90%to lower than 20%,and showing excellent adaptability to the variable properties of waste cutting *** with the design of the magnetic disk separator,continuous demulsification separation of the waste cutting emulsion was achieved at 1.0 t/hr for at least 1. hr to obtain clear effluent with 81.chemical oxygen demand removal and 89%turbidity *** study demonstrates the feasibility of applying magnetic demulsification separation to large-scale continuous treatment of waste ***,it addresses the flocs-water separation problems that occur in practical flocculant demulsification engineering applications.

关键词： Waste cutting emulsion Magnetic particles Demulsification and separation Magnetic disk separator Large-scale treatment

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High-solid anaerobic digestion of sewage sludge:achievements and perspectives

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Frontiers of Environmental Science & Engineering 2021年第4期15卷 1-18页

作者： Ying Xu Hui Gong Xiaohu Dai State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092China

High-solid anaerobic digestion(HS-AD)has been applied extensively during the last few decades for treating various organic wastes,such as agricultural wastes,organic fractions of municipal solid wastes,and kitchen ***,the application of HS-AD to the processing of sewage sludge(SS)remains limited,which is largely attributable to its poor process stability and *** research has been conducted to attempt to surmount these *** this review,the main factors affecting process stability and performance in the HS-AD of SS are comprehensively reviewed,and the improved methods in current use,such as HS sludge pre-treatment and anaerobic co-digestion with other organic wastes,are ***,this paper also discusses the characteristics of substance transformation in the HS-AD of SS with and without thermal *** has shown that the HS effect is due to the presence of high concentrations of substances that may inhibit the function of anaerobic microorganisms,and that it also results in poor mass transfer,a low diffusion coefficient,and high ***,knowledge gaps in the current research on HS-AD of SS are *** on these,it proposes that future efforts should be devoted to standardising the definition of HS sludge,revealing the law of migration and transformation of pollutants,describing the metabolic pathways by which specific substances are degraded,and establishing accurate mathematical ***,developing green sludge dewatering agents,obtaining high value-added products,and revealing effects of the above two on HS-AD of SS can also be considered in future.

关键词： High-solid effect Anaerobic fermentation Methane production Biodegradability Sludge treatment

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Research progress of nitrate removal technologies based on photoelectrochemical reduction

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Zhongguo Huanjing Kexue/China Environmental Science 2025年第4期45卷 1878-1888页

作者： Huang, Tian-Rong Wang, Kai-Chong Li, Zi-Bin Li, Dan-Ping Wang, Han Wang, Ya-Yi School of Environmental Science and Engineering Tongji University Shanghai200092 China State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai200092 China

As a common pollutant in water, nitrate has nonnegligible harmful effects on human health and the ecological environment. Faced with an increasingly severe energy crisis, the development of green, clean and sustainable nitrate removal technologies to replace the conventional resource-intensive denitrification process is urgently needed. Photoelectrochemical nitrate reduction powered by sunlight has become a research hotspot at home and abroad. Based on the way photogenerated electrons being transferred from semiconductor to nitrate, this technology can be categorized into photocatalytic reduction, photoelectrocatalytic reduction, and microbial photoelectrotrophic reduction. In this review, the mechanisms of three photoelectrochemical nitrate reduction technologies were discussed. With a focus on improving system performance, the selection and design strategies of photocatalysts, photoelectrodes and microbial photosensitizers were also summarized. Moreover, the technical difficulties of photoelectrochemical nitrate reduction are clarified and the future directions of research are proposed, such as regulating the pathway of microbial absorption and utilization of photogenerated electrons through genetic engineering and other methods. The insights provided will serve as a reference for the development of new nitrate removal and reutilization technologies. © 2025 Chinese Society for Environmental Sciences. All rights reserved.

关键词： Sustainable development

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Coastal mudflats as reservoirs of extracellular antibiotic resistance genes: Studies in Eastern China

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Journal of Environmental Sciences 2023年第7期129卷 58-68页

作者： Qingbin Yuan Xiaolin Wang Hui Fang Yuan Cheng Ruonan Sun Yi Luo College of Environmental Science and Engineering Nanjing Tech UniversityNanjing 211816China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China School of Medicine Nankai UniversityTianjin 300071China Department of Civil and Environmental Engineering Rice UniversityHouston 77005USA

Despite coastal mudflats serving as essential ecological zones interconnecting terrestrial/freshwater and marine systems,little is known about the profiles of antibiotic resistance genes(ARGs)in this *** this study,characteristics of typical ARGs,involving both intracellular(iARGs)and extracellular ARGs(eARGs)at different physical states,were explored in over 1.00 km of coastal mudflats in Eastern *** indicated the presence of iARGs and eARGs at states of both freely present or attached by *** abundance of eARGs was significantly higher than that of iARGs(87.3%vs 1..7%),and their dominance was more significant than those in other habitats(52.7%-76.3%).ARG abundance,especially for eARGs,showed an increasing trend(p<0.05)from southern(Nantong)to northern(Lianyungang)*** salinity facilitated the transformation from iARGs to eARGs,and smaller soil particle size was conducive to the persistence of eARGs in northern coastal *** study addresses the neglected function of coastal mudflats as eARGs reservoirs.

关键词： Antibiotic resistance genes(ARGs) Extracellular antibiotic resistance genes(eARGs) Coastal mudflats Amplicon sequencing Geochemical variable Mobile genetic elements

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Interactions between methyl octabromo ether flame retardant and expanded polystyrene microplastics in the photoaging process

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Chemosphere 2024年 358卷 142165页

作者： Shi, Yanqi Zheng, Lezhou Huang, Hexinyue Shi, Linping Gong, Zhimin Ye, Kefu Chen, Xingqi Gao, Shixiang State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing210093 China

Expanded polystyrene (EPS) plastic is widely used because of its low density and lightweight properties, enabling it to float on water and increase its exposure to sunlight. In this study, we simulated the photoaging process of flame retardant-added EPS (FR-EPS) and common original EPS (OR-EPS) microplastic (MP) particles with and without methyl octabromoether flame retardant (MOBE) in the laboratory to explore the effect of MOBE on the photodegradation of EPS. Results showed that MOBE accelerated size reduction and surface hole formation on the particles, hastening the shedding and replacement of particle surfaces. FR-EPS particles exhibited a weight loss exceeding that of OR-EPS, reaching 40.85 ± 3.72% after 36 days of irradiation. Moreover, rapid physical peeling of the FR-EPS surface was accompanied by continuous chemical oxidation and fluctuations of the carbonyl index and O/C ratio. A diffusion model based on Fick's second law fitted well for the concentration of MOBE remaining in FR-EPS particles. MOBE's sensitivity to direct photochemical reactions inhibited the early-stage photoaging of EPS MP particles by competing for photons. However, MOBE as chromophores could absorb photons and produce •OH to promote the aging of EPS. Moreover, the capacity of EPS to absorb light energy also accelerated MOBE degradation. These findings suggested that the photoaging behavior of commercial EPS products containing flame retardants in the environment is quite different from that of pure EPS, indicating that additive-plastic interactions significantly alter MP fate and environmental risks. © 2024 Elsevier Ltd

关键词： Microplastic

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Interface-induced charge transfer pathway switching of a Cu_(2)O-TiO_(2)photocatalyst from p-n to S-scheme heterojunction for effective photocatalytic H_(2)evolution

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Journal of Materials Science & Technology 2024年第26期193卷 98-106页

作者： Kaihui Huang Guijie Liang Shaolong Sun Haobin Hu Xiaoming Peng Rongchen Shen Xin Li Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642China Hubei Key Lab Low Dimens Optoelect Mat&Devices Hubei University of Arts and ScienceXiangyang 441053China College of Natural Resources and Environment South China Agricultural UniversityGuangzhou 510642China Key Laboratory of Efficient Utilization of Oil and Gas Resources in Longdong College of Petroleum and Chemical EngineeringLongdong UniversityQingyang 745000China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

Photocatalytic hydrogen evolution from water splitting is an appealing method for producing clean chemical ***_(2)O,with a suitable bandgap,holds promise as a semiconductor for this ***,the strong photo-corrosion and rapid charge recombination of Cu_(2)O strongly limit its application in the photocatalytic ***,an S-scheme heterojunction photocatalyst composed of TiO_(2)and Cu_(2)O was rationally designed to effectively avoid the photo-corrosion of Cu_(2)*** introduction of an interfacial nitrogen-doped carbon(NC)layer switches the heterojunction interfacial charge transfer pathway from the p-n to S-scheme heterojunction,which avoids excessive accumulation of photogenerated holes on the surface of Cu_(2)***,the hybrid structure shows a broad spectral response(300-800 nm)and efficient charge separation and transfer ***,the highest photocatalytic hydrogen evolution rate of TiO_(2)-NC-3%Cu_(2)O-3%Ni is 1.521.9μmol g^(-1.h^(-1.,which is approximately 664.1.times higher than that of pure Cu_(2)***-situ X-ray photoelectron spectroscopy and Kelvin probe confirm the charge transfer mechanism of S-scheme *** formation of S-scheme heterojunctions effectively accelerates the separation of photogenerated electron-hole pairs and enhances redox capacity,thereby improving the photocatalytic performance and stability of Cu_(2)*** study provides valuable insights into the rational design of highly efficient Cu_(2)O-based heterojunction photocatalysts for hydrogen production.

关键词： Photocatalytic hydrogen evolution Cu_(2)O S-scheme heterojunction Charge separation mechanism Nitrogen doped carbon

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