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SSRN 2024年

作者： Zhao, Jie Han, Yuze Liu, Junzhao Li, Baoju Li, Jun Li, Wentao Shi, Peng Pan, Yang Li, Aimin State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Nanjing210023 China Nanjing University China Nanjing University Yancheng Academy of Environmental Protection Technology and Engineering Yancheng224000 China Quanzhou Institute for Environmental Protection Industry Nanjing University Quanzhou362008 China

Although there have been a lot of studies done in the Taihu Lake Basin to look at antibiotic contamination in aquaculture tailwaters, most studies only focus on the aquaculture period, and little is known about antibiotic contamination during aquaculture pond cleaning period. Therefore, this study aimed to investigate the spatial distribution and culture patterns of antibiotics during clearing of 57 aquaculture ponds in the Taihu Lake Basin, and to assess their risks to the ecological environment. According to research findings, the detection frequency of 26 typical antibiotics is between 1.75 and 80.7%, and the overall detection concentration range is between 3.268~708.719 ng/L. Among them, the detection rate of 8 antibiotics exceeded 50%. From the perspective of spatial distribution, the concentration of antibiotics in breeding ponds in Changzhou is relatively high, reaching a maximum of 708.719 ng/L. This may be related to the large breeding area and intensive breeding in Changzhou area. The total antibiotic concentration in fish ponds was 3.268~445.57 ng/L, which was significantly higher than crab ponds (13.01~206.291 ng/L) and shrimp ponds (23.17~107.40 ng/L). Fish ponds mainly contain quinolones and sulfa antibiotics, accounting for 51.49% of the total antibiotic concentration. In addition, sulfamethoxazole (SMX) and enrofloxacin (ENR) were antibiotics detected at higher concentrations. Risk assessment shows that SMX, ENR and ofloxacin (OFX) contribute significantly to ecological risks. In addition, the study also found that the three-level constructed wetland process has a removal rate of 92.44% of antibiotics in aquaculture tailwater, while other processes have limited removal rates of antibiotics. This work closes the knowledge gap regarding antibiotic contamination in the Taihu Basin during aquaculture pond clearance. The formulation of targeted management measures and policies is crucial in mitigating the release of antibiotics during aquaculture pond cle

关键词： Antibiotics

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Electrochemical oxidation of chloramphenicol by modified Sm-PEG-PbO2 anodes: Performance and mechanism

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Chemosphere 2023年第1期327卷

作者： Zhang, Chaoyang Gao, Conghao Yang, Shumin He, Xin Chen, Yue Qin, Xiao Tang, Yulin State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science & Engineering Tongji University Shanghai200092 China Key Laboratory of Water Supply Water Saving and Water Environment Treatment for Towns in the Yangtze River Delta Ministry of Water Resources Shanghai200092 China Hebei Haikuo Environmental Protection Technology Co. LTD Baoding071000 China

Chloramphenicol (CAP) is used extensively in industry and daily life, but its abuse has seriously affected the environment and public health. In this paper, a new composite PbO2 electrode was obtained through the modification Sm and polyethylene glycol (PEG), and an electrocatalytic oxidation technology of CAP degradation was investigated. The results showed that the catalytic degradation ability and industrial service life of the PEG-Sm-PbO2 composite electrode were significantly enhanced. Co-doping inhibited the growth of grains, resulting in the formation of refined pyramidal grains on the surface of the electrode, which increased the number of active spots. The industrial service life of the modified electrode was improved by 87.0%. In addition, the degradation effect under different conditions and mechanism of CAP were also explored. The optimal conditions for CAP degradation were explored, at which time the CAP degradation rate reached 99.1%. The degradation process was in accordance with the primary reaction kinetics, and the apparent rate constant of CAP at the PEG-Sm-PbO2 electrode was raised by 57.1% in comparison with the unmodified electrode, indicating that the modification facilitated the degradation of CAP in the electrode. Finally, two possible CAP degradation pathways were deduced. The results will provide technical support and a theoretical basis for the degradation of persistent organic pollutants. © 2023 Elsevier Ltd

关键词： Degradation

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Nanoconfinement Boosts Affinity of Hydrated Zirconium Oxides to Arsenate: Surface Complexation Modeling Study

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SSRN 2023年

作者： Shen, Pengfei Pan, Siyuan Huang, Xianfeng Zhang, Xiaolin State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China Nanjing University Nanjing210023 China National and Local Joint Engineering Research Center for Ecological Treatment Technology of Urban Water Pollution School of Life and Environmental Science Wenzhou University Wenzhou325035 China

Nanoscale hydrated zirconium oxide (HZO) holds great potential in groundwater purification due to its ability to form inner-sphere coordination with arsenate. Despite being frequently encapsulated in bulky hosts for practical applications in water treatment, the adsorption mechanism of arsenate onto HZO remains scantily explored, especially for in-situ and quantitative analysis of nanoconfinement effects on the surface chemistry of HZO at real solid-liquid interfaces. In this study, we investigated the Zr-As coordination configuration and corresponding intrinsic coordination constants (Kintr) values using surface complexation modeling (SCM), and distinguished the nanoconfinement effects by comparing bare HZO with the HZO nanoparticles (NPs) encapsulated inside the strongly basic anion exchanger D201. Potentiometric titration suggests that the protonated form (≡ZrOH2+) is the dominant surface Zr species, and D201 enhances the protonation degree by reducing electrostatic repulsion to H+. Batch adsorption experiments demonstrate that the nanocomposite (HZO@D201) has a higher adsorption capacity in a wide range of pH (3-10) and ionic strength (0.001-0.1 M NaNO3) than bare HZO. SCM simulations reveal that the coordination configuration of diprotonated monodentate mononuclear (MM-H2) dominates at pH 3-6, while deprotonated bidentate binuclear (BB-H0) dominates at pH>7. For each configuration, the intrinsic coordination constants (Kintr) of HZO@D201 (10−0.66 and 10−16.10, respectively) are significantly higher than those of bare HZO (10−12.24 and 10−44.42, respectively), indicating a superior chemical bonding affinity caused by nanoconfinement. The obtained Kintr values are used to predict arsenate adsorption isotherms in pH 3 and 9, and the results align with the SCM simulation outcomes. © 2023, The Authors. All rights reserved.

关键词： Nanocomposites

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Oriented Self-Assembly of Anisotropic Layered Double Hydroxides (Ldhs) with 2d-on-3d Hierarchical Structure

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SSRN 2023年

作者： Cao, Jingjing Feng, Zimou Liang, Huaxing Lu, Xinglin Wang, Wei State Key Laboratory of Pollution Control and Resource Reuse China CAS Key Laboratory of Urban Pollutant Conversion Department of Environmental Science and Engineering National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei230026 China Department of Chemistry University of Bergen Bergen5007 Norway Centre for Pharmacy University of Bergen Bergen5020 Norway

Layered double hydroxides (LDHs) have been the subject of increasing research due to their unique 2D or 3D structures and promising applications. However, achieving precise control over their morphology and architecture has proven to be a significant challenge. In this work, we present an oriented self-assembly strategy for the synthesis of ultrathin 2D-on-3D CoNi-LDHs nanoflowers (NFs) at ambient temperature. Ex situ and in situ characterization techniques were employed to elucidate the formation process of the 2D-on-3D CoNi-LDHs hierarchical structure. The 2D nanosheets are composed of CoNi(OH)2 seeds that undergo rapid nucleation and growth. Under the influence of oriented attachment and Ostwald ripening, the 2D nanosheets continue to crystallize along the axial and radial directions, resulting in the formation of 2D-on-3D CoNi-LDH NFs. This unique 2D-on-3D LDHs structure possesses an ultrathin thickness of approximately 1.5 nm, nanopores with a diameter of approximately 3.8 nm, and a large surface area of approximately 154 m2 g−1. These properties manifest excellent energy-storage performance in supercapacitors. Our approach provides important insights into the precise synthesis of LDHs with a 2D-on-3D hierarchical structure. The synthesis of LDHs with well-defined structures is a significant challenge in materials science. Our work contributes to the advancement of this field and has the potential to facilitate the development of new, high-performance energy-storage devices. © 2023, The Authors. All rights reserved.

关键词： Ostwald ripening

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Investigation of Silver Nanoparticles Interaction with Human Proteins (Igg & Fib)

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SSRN 2022年

作者： Li, Yanli Wang, Xunhao Zhang, Jie Wu, Zhichao State Key Laboratory of Pollution Control and Resource Reuse Shanghai Institute of Pollution Control and Ecological Security College of Environmental Science and Engineering Tongji University Shanghai200092 China Department of Chemical and Environmental Engineering University of California RiversideCA92521 United States

Silver nanoparticles (AgNPs) have been extensively investigated and used in various areas due to their excellent antimicrobial and unique optical properties. When NPs and their derivatives encounter a physiological environment (e.g., blood, plasma, or interstitial fluid), they will be rapidly encapsulated by proteins existing in the biological fluids, which will form a type of nanoparticle called protein corona (PC). During this process, the protein type, concentration, and ratio of two proteins (IgG and Fib) were altered. The goal of this study is to understand the physicochemical reactions in the system. Dynamic light scattering (DLS) and multi-barreled light scattering (Turbiscan) are two major techniques used in this study. Our results show that at low ionic strength, separated segments of IgG preferentially adsorbed on the surface of AgNPs and played a bridging role in increasing AgNPs aggregation. However, highly self-association Fib preferentially adsorbed and played a net capture role in decreasing the aggregation. When both proteins were present, the reverse inhibitory effect of Fib was more advantageous than the forward promoting effect of IgG. At high ionic strength, IgG and Fib could cooperate to inhibit AgNPs aggregation while Fib had greater effect than IgG. Moreover, with a small amount of protein existing in the system, a stable PC did not form in a short time. In contrast, with a high amount of protein, a stable PC formed within 10 min. The movement of protein molecules around AgNPs corona was more vigorous when there was a higher amount of protein in the system. © 2022, The Authors. All rights reserved.

关键词： Proteins

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Pro K-Enhanced Mesophilic Anaerobic Co-Digestion of Food Waste and Pla/Pbat/Starch Plastics: key Gene and Pathway Activation for Methane and L-Lactate Production

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SSRN 2024年

作者： Wang, Shizhuo Zhang, Tao Xia, Xuefen Zhang, Kuan Fan, Jianwei Zhang, Yalei Shen, Zheng State Key Laboratory of Pollution Control and Resources Reuse Key Laboratory of Yangtze River Water Environment of MOE College of Environmental Science and Engineering Tongji University Shanghai200092 China Key Laboratory of Toilet and Sewage Treatment Technology Ministry of Agriculture and Rural Areas China Institute of New Rural Development College of Electronics and Information Engineering Tongji University Shanghai200092 China Key Laboratory of Rural Toilet and Sewage Treatment Technology Ministry of Agriculture and Rural Affairs Shanghai China

Due to the limitations of hydrolysis, numerous biodegradable plastics (BPs) have extended degradation cycles and reduced biodegradation rates under anaerobic conditions. To improve the anaerobic co-degradation efficacy of food waste mixed with commercial biodegradable plastics (PLA/PBAT/starch), porcine pancreatic lipase (PPL) and protease K (Pro K) were embedded in the plastics, and the reaction process was analyzed through metagenomics. Biomarkers at each stage of the anaerobic co-digestion process were measured to verify the accuracy of the pathway analysis. After Pro K enzyme embedding, according to the kinetic equations, the hydrolysis kinetic constant of the co-digestion system increased by 18.42%, accompanied by an increase in the degradation rate of plastics from 7.3% to 19.3%. In the hydrolysis phase, the pathways producing pyruvate and lactate from food waste and plastic hydrolysis were enhanced, respectively, according to the functional gene analysis. Interestingly, enzyme modification significantly enhanced the conversion pathway from D-lactate to L-lactate, raising the L/D ratio from 1:1 in control to a peak of 20:1 in PKBP. During the acidogenesis phase, the enrichment of L-lactate, led to an increase in acetate concentration, strengthening the pathways of converting L-lactate directly into acetate and via acetyl-CoA. In the methanogenesis phase, the genes for the acetoclastic and hydrogenotrophic methanogenesis pathways were both enhanced, resulting in methane production increases of 17.59%. This study attempts to verify the impact of enzyme modification on gene pathways in BP anaerobic co-digestion from the perspective of metagenomic analysis, thereby improving asynchronous multi-substrate degradation. © 2024, The Authors. All rights reserved.

关键词： Hydrolysis

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Study on the Advanced Nitrogen Removal Under Low Temperature by Biofilm on Weak Magnetic Carriers

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SSRN 2022年

作者： Chen, Sien Yang, Dongli Wang, Qingxin Huang, Xueying Ren, Hongqiang Xu, Ke State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China School of Geographic and Oceanographic Sciences Nanjing University Nanjing210023 China

The advanced nitrogen removal of MWTPs effluent under low temperature is inhibited because of reduction of the microbial activity. Packed bed reactors filled with different magnetic carriers (0, 0.3, 0.6, 0.9 mT) were constructed to enhance the advanced nitrogen removal under low temperature (5 ℃). The results showed that 0.3 and 0.9 mT carriers significantly improved the denitrification performance, indicating the "window" effect. Total nitrogen removals were increased by 6.96% and 8.25%, and accumulation of NO2- decreased by 25.70% and 13.90% in 0.3 and 0.9 mT reactors, respectively. Analysis of electron transport chain revealed that 0.3 mT carrier significantly increased the abundance of compound III by 13.88% and 0.9 mT carrier improved the abundance of cytC by 11.21%. Similar microbial community shifts in 0.3 and 0.9 mT reactors contributed to the denitrification performance. Overall, weak magnetic carriers can be a novel strategy to enhance advanced nitrogen removal under low temperature. © 2022, The Authors. All rights reserved.

关键词： Temperature

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Trace Mn(Ii)-Catalyzed Periodate Oxidation of Organic Contaminants Not Relying on Any Transient Reactive Species: The Substrate-Dependent Dual Roles of In-Situ Formed Colloidal Mno2

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SSRN 2022年

作者： Zong, Yang Shao, Yufei Ji, Wenjie Zeng, Yunqiao Xu, Jun Liu, Wen Xu, Longqian Wu, Deli State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science & Engineering Tongji University Shanghai200092 China The Key Laboratory of Water and Sediment Sciences Ministry of Education College of Environmental Sciences and Engineering Peking University Beijing100871 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Traditional advanced oxidation processes (AOPs) generally rely on excessive catalyst to trigger transient reactive species (TRSs) for organic contaminants degradation. Herein, trace Mn(II) was employed to robustly catalyze contaminants oxidation by periodate (PI). Multiple evidences excluded the oxidative contributions of TRSs, instead the stoichiometric formation of colloidal MnO2 via the condensation of di-μ-oxo-bridged Mn(IV) cluster was confirmed by UV-vis, X-ray absorption near edge structure spectroscopy and density functional theory calculation. Dependent on substrate structure, MnO2 colloids solely or simultaneously served as oxidant and catalyst for the enhanced performance. Benefiting from the non-TRSs-involved oxidation strategy and the catalytic effect of Mn species, the trace-Mn(II)/PI process even outperformed the Co(II)-activated PMS counterpart and other representative TRSs-dominated AOPs. This study elucidated the roles of Mn(II) and colloidal MnO2 in PI-based oxidation, and also signified the superiority of trace catalyst-assisted process without TRSs involvement in avoiding undesired side reactions and maximizing oxidation efficiency. © 2022, The Authors. All rights reserved.

关键词： Manganese oxide

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Cuco2s4 as a Pms Activator for Effective Degradation of Sulfathiazole: Insights into High-Valent Metals

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SSRN 2025年

作者： Wang, Qiongfang Yuan, Yulin Zhang, Xin Dong, Lei Peng, Cheng Zhang, Min Rao, Pinhua Gao, Naiyun Deng, Jing College of Chemistry and Chemical Engineering Shanghai University of Engineering Science Shanghai201600 China Co. LTD Shanghai200092 China State Key Laboratory of Pollution Control Reuse Tongji University Shanghai200092 China College of Civil Engineering and Architecture Zhejiang University of Technology Hangzhou310014 China Tongji University China

The development of high-valent metal species was hindered by their relatively low generation rate in PMS activation. In this study, CuCo2S4 was synthesized via a simple hydrothermal method, which could effectively active PMS to form high conversion rate of high-valent metal species (Co(IV)=O, Cu(III)) with achieving complete degradation of sulfamethazine within 20 minutes. Besides, [[EQUATION]] as another dominant degradation agent, with various radicals playing a supplementary role in pollutant degradation. Furthermore, bimetallic Cu and Co cycling and S element assisted metal cycling was established in the degradation mechanism. In addition, density functional theory (DFT) calculations, including Fukui function analysis, were used to predict the reactive sites of STZ. Combined with LC-MS analysis of the intermediates, four possible reaction pathways were proposed. Toxicological analysis of the intermediates indicated that the CCS/PMS system effectively reduced toxicity. Moreover, the results of five consecutive cycling experiments demonstrated that the catalyst possessed excellent stability. Overall, the synthesized catalyst exhibited remarkable stability in the presence of different anions, various water samples, and diverse antibiotics, providing a new perspective for the development of metal sulfide catalysts capable of generating high-valent metal species. © 2025, The Authors. All rights reserved.

关键词： Reaction intermediates

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Synergetic roadmap of carbon neutrality and clean air for China

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Environmental Science and Ecotechnology 2023年第4期16卷 1-25页

作者： Qiang Zhang Zhicong Yin Xi Lu Jicheng Gong Yu Lei Bofeng Cai Cilan Cai Qimin Chai Huopo Chen Hancheng Dai Zhanfeng Dong Guannan Geng Dabo Guan Jianlin Hu Cunrui Huang Jianing Kang Tiantian Li Wei Li Yongsheng Lin Jun Liu Xin Liu Zhu Liu Jinghui Ma Guofeng Shen Dan Tong Xuhui Wang Xuying Wang Zhili Wang Yang Xie Honglei Xu Tao Xue Bing Zhang Da Zhang Shaohui Zhang Shaojun Zhang Xian Zhang Bo Zheng Yixuan Zheng Tong Zhu Jinnan Wang Kebin He Ministry of Education Key Laboratory for Earth System Modelling Department of Earth System ScienceTsinghua UniversityBeijing100084China Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science&TechnologyNanjing210044China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Institute for Carbon Neutrality Tsinghua UniversityBeijing100084China State Key Joint Laboratory for Environment Simulation and Pollution Control College of Environmental Sciences and Engineering and Center for Environment and HealthPeking UniversityBeijing100871China Center of Air Quality Simulation and System Analysis Chinese Academy of Environmental PlanningBeijing100012China Center for Carbon Neutrality Chinese Academy of Environmental PlanningBeijing100012China National Center for Climate Change Strategy and International CooperationBeijing100035China Nansen-Zhu International Research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029China College of Environmental Sciences and Engineering Peking UniversityBeijing100871China Institute of Environmental Policy Management Chinese Academy of Environmental PlanningBeijing100012China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and EngineeringCollaborative Innovation Center of Atmospheric Environment and Equipment TechnologyNanjing University of Information Science and TechnologyNanjing210044China Vanke School of Public Health Tsinghua UniversityBeijing100084China Center for Energy and Environmental Policy Research Beijing Institute of TechnologyBeijing100081China China CDC Key Laboratory of Environment and Population Health National Institute of En

It is well recognized that carbon dioxide and air pollutants share similar emission sources so that synergetic policies on climate change mitigation and air pollution control can lead to remarkable co-benefits on greenhouse gas reduction,air quality improvement,and improved *** the context of carbon peak,carbon neutrality,and clean air policies,this perspective tracks and analyzes the process of the synergetic governance of air pollution and climate change in China by developing and monitoring 18 *** 18 indicators cover the following five aspects:air pollution and associated weather-climate conditions,progress in structural transition,sources,inks,and mitigation pathway of atmospheric composition,health impacts and benefits of coordinated control,and synergetic governance system and *** tracking the progress in each indicator,this perspective presents the major accomplishment of coordinated control,identifies the emerging challenges toward the synergetic governance,and provides policy recommendations for designing a synergetic roadmap of Carbon Neutrality and Clean Air for China.

关键词： Carbon neutrality Clean air Synergetic roadmap

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