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Efficient decontamination and detoxification of phenols by photocatalytic CQDs@Ag3PO4: Re-insights into the targeted reduction and coupling processes of ·O2- and 1O2

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SSRN 2024年

作者： Yao, Zhenlong Wang, Qiaoqiao Fan, Jinhong Yu, Tao Zhang, Chaojie Zhou, Xuefei Key Laboratory of Urban Water Supply Water Saving and Water Environment Governance in the Yangtze River Delta of Ministry of Water Resources Tongji University Shanghai200092 China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China School of Aerospace Engineering and Applied Mechanics Tongji University Shanghai200092 China

Photogenerated carrier separation, generation of active oxygen species, and effective utilization are critical factors in photocatalysis. Here we develop a carbon quantum dots-modified silver phosphate (CQDs@Ag3PO4) photocatalyst with a high visible light absorption threshold（λ ≤ 565 nm) and narrowed band gap (Eg = 2.25 eV). The photocatalyst exhibits a removal of 100% for micropollutant of p-nitrophenol (PNP) within 120 min under optimized conditions, simultaneously holds high photocatalytic stability via successive recycles. Quenching experiments, electron paramagnetic resonance spectroscopy characterizations, probe experiments, and comparative tests on TOC removal have confirmed photogenerated carrier was effectively separated. Besides photoinduced holes(h+), singlet oxygen (1O2) and superoxide anion (·O2-) induced by photoinduced electrons and molecular oxygen are the primary reactive species involved in the aerobic system. Through HPLC-MS and Fukui Function, it reveals the targeted reductionand advanced oxidation role of ·O2-, realizing decontamination and detoxification of PNP. Moreover, replacement of pollutant degradation by 1O2- induced coupling reaction provides a novel idea for water remediation. Accordingly, four PNP elemination pathways were proposed, and the key intermediates had low toxicity predicted by T.E.S.T. ***, this work deepens the understanding of selective degradation of pollutant and provides a strategy for pollutant control with solar energy utilization. © 2024, The Authors. All rights reserved.

关键词： Nanocrystals

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Solar-driven butanedione-based disinfection: A by-product-free approach to pathogen control

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Fundamental Research 2025年

作者： Zewen Ji Wenchang Zhang Jianghua Yang Peng Peng Haoran Chen Shujuan Zhang State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210023 China

The imperative for environmentally friendly water disinfection methods has spurred the exploration of innovative solutions to mitigate microbial threats in water while simultaneously controlling the formation of harmful disinfection by-products (DBPs). This study introduces the combination of butanedione (BD) and solar irradiation as an effective method to inactivate pathogenic bacteria, including Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus . Acetyl radicals produced by solar activation of BD homolytic cleavage combined with dissolved oxygen to form acetyl peroxyl radicals, which were the main reactive species in the disinfection process. These acetyl peroxyl radicals attack bacterial cell membranes, escalate intracellular reactive oxygen species, and induce oxidative degradation of vital intracellular components such as enzymes and nucleic acids. Remarkably, the BD/Solar system demonstrated exceptional disinfection efficacy across a range of water quality parameters, achieving rate constants that were 5.2-98.1 times greater than those of other advanced disinfection processes that utilize H 2 O 2 , peroxydisulfate, or periodate in combination with solar irradiation. Notably, there was no evidence of bacterial regrowth and no formation of typical halogenated DBPs after treatment. These findings highlight the potential of this novel solar-powered system as a green approach for controlling environmental pathogens in a variety of waters, especially in sunlit swimming pools.

关键词： Bacterial inactivation Diketone Acetyl peroxyl radical Metabolomics Disinfection by-products (DBPs)

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The hidden risk of microplastic-associated pathogens in aquatic environments

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Eco-Environment & Health 2023年第3期2卷 142-151页

作者： Huan Zhong Mengjie Wu Christian Sonne Su Shiung Lam Raymond W.M.Kwong Yuelu Jiang Xiaoli Zhao Xuemei Sun Xuxiang Zhang Chengjun Li Yuanyuan Li Guangbo Qu Feng Jiang Huahong Shi Rong Ji Hongqiang Ren School of Environment Nanjing UniversityState Key Laboratory of Pollution Control and Resource ReuseNanjing 210023China Department of Bioscience Arctic Research CentreAarhus UniversityRoskildeDenmark Higher Institution Centre of Excellence(HICoE) Institute of Tropical Aquaculture and Fisheries(AKUATROP)Universiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia Department of Biology York University4700 Keele StreetTorontoON M3J 1P3Canada Tsinghua Shenzhen International Graduate School Shenzhen 518055China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdao 266071China Institute of Environmental Research at Greater Bay Area Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006China Key Laboratory of Environment and Health(HUST) Ministry of Education&Ministry of Environmental Protectionand State Key Laboratory of Environmental Health(Incubation)School of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Environmental Science and Engineering Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation TechnologySun Yat-sen UniversityGuangzhou 510275China State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200241China University Centre for Research and Development Department of ChemistryChandigarh UniversityGharuanMohaliPunjabIndia

Increasing studies of plastisphere have raised public concern about microplastics(MPs)as vectors for pathogens,especially in aquatic ***,the extent to which pathogens affect human health through MPs remains unclear,as controversies persist regarding the distinct pathogen colonization on MPs as well as the transmission routes and infection probability of MP-associated pathogens from water to *** this review,we critically discuss whether and how pathogens approach humans via MPs,shedding light on the potential health risks *** on cutting-edge multidisciplinary research,we show that some MPs may facilitate the growth and long-range transmission of specific pathogens in aquatic environments,ultimately increasing the risk of infection in *** identify MP-and pathogen-rich settings,such as wastewater treatment plants,aquaculture farms,and swimming pools,as possible sites for human exposure to MP-associated *** review emphasizes the need for further research and targeted interventions to better understand and mitigate the potential health risks associated with MP-mediated pathogen transmission.

关键词： Microplastics Pathogens Colonization Transmission Public health

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Nitrate removal from aqueous solutions by magnetic cationic hydrogel:Effect of electrostatic adsorption and mechanism

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Journal of Environmental Sciences 2020年第5期32卷 177-188页

作者： Junyi Li Shuoxun Dong Yili Wang Xiaomin Dou Haotian Hao College of Environmental Science and Engineering Beijing Key Lab for Source Control Technology of Water PollutionBeijing Forestry UniversityBeijing 100083China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China

Excessive nitrate(NO3-)is among the most problematic surface water and groundwater *** this study,a type of magnetic cationic hydrogel(MCH)is employed for NO3-adsorption and well characterized *** adsorption capacity is considerably pHdependent and achieves the optimal adsorption(maximum NO3--adsorption capacity is95.88±1.24 mg/g)when the pH level is *** fitting result using the homogeneous surface diffusion model indicates that the surface/film diffusion controls the adsorption rate,and NO3-approaches the center of MCH particles within 30 *** diffusion coefficient(Ds)and external mass transfer coefficient(kF)in the liquid phase are1.15×10-6 cm2/min and 4.5×10-6 cm/min,*** MCH is employed to treat surface water that contains 10 mg/L of NO3-,and it is found that the optimal magnetic separation time is 1.6 *** high-efficiency mass transfer and magnetic separation of MCH during the adsorption-regeneration process favors its application in surface water ***,the study of the mechanism involved reveals that both-N+(CH3)3 groups and NO3-are convoluted in adsorption via electrostatic *** is further found that ion exchange between NO3-and chlorine occurs.

关键词： Adsorption Nitrate removal Low concentration Electrical stern layer Magnetic cationic hydrogel

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Sorption behavior of trichloroethylene in arsenic contaminated soil: Batch experiment and mechanism insight

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Journal of Environmental Sciences 2025年

作者： Wei Zhang Zongcheng Yao Mengting Li Xueqi Zhang Yuting Wang Dongmei Zhou Qiming Xian State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing 210023 China

Co-contamination of chlorinated hydrocarbons and arsenic is frequently observed in the chemically contaminated sites and their surroundings in China. However, the interaction between these complex contaminants in soil remains is unclear. This study collected ten background soils with varying properties from various regions throughout China, and investigated the sorption and desorption process of trichloroethylene (TCE) in the exogenous arsenate (As(Ⅴ)) contaminated soils. The results of the batch experiments demonstrated that TCE was rapidly adsorbed by soil organic matter (SOM). Both SOM and minerals contributed to the slow sorption equilibrium process. The sorption isotherms were linear, while the desorption isotherms were non-linear. In Heilongjiang (HLJ) soil, As(V) contamination increased the TCE sorption contribution of black carbon and decreased the contribution of minerals. During the aging process of As(Ⅴ) in soils, SOM was replaced by AsO 4 3− , which formed complexes with soil Fe/Al oxides, resulting in a significant increase in hydroxyl groups and hydrophilicity of the soil surface. This hindered the hydrophobic sorption of TCE. Additionally, As(Ⅴ) contamination affected soil geotechnical properties, and the As-cations precipitation could block the sorption micropores. The collective results of these processes caused a reduction in the sorption of TCE on the majority of As(V)-contaminated soils (702-5854 mg/kg) in comparison to background soils (1194-6374 mg/kg). The systematic investigation of sorption-desorption behaviors of TCE in As(V)-contaminated soils will provide a scientific basis for the calculation of soil environmental capacity of heavy metal - organic combined contamination in the future.

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Bioaccessibility of Polypropylene Microfiber-Associated Tetracycline and Ciprofloxacin in Simulated Human Gastrointestinal Fluids

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SSRN 2023年

作者： Wu, Xiaowei Zhao, Xiaoli Chen, Rouzheng Liu, Peng Liang, Weigang Wang, Junyu Shi, Di Wang, Xia Gao, Shixiang State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China Ministry of Agriculture College of Natural Resources and Environment Northwest A & F University Xianyang712100 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210093 China

Although humans inevitably ingest microfibers, the bioaccessibility of microplastics-associated chemicals in the human gastric and intestinal phase fluids remains unresolved. This study investigated the mechanism and primary factor governing the bioaccessibility of polypropylene (PP) microplastic fiber-associated tetracycline (TC) and ciprofloxacin (CIP) in the simulated human gastrointestinal fluids. After mixed 0.1 g PP microfiber with 10 mg/L TC and CIP for 96 h, and exposed to simulated human gastrointestinal fluids, there were 0.440, 0678, and 1.840 mg/L TC and 0.700, 1.367, and 3.281 mg/L CIP were determined in the simulated human saliva, gastric, and intestinal fluids after incubated for 60 s, 4 h, and 8 h, respectively. This indicated that antibiotic TC and CIP adsorbed onto microfiber surface are readily to release human gastrointestinal fluids after uptake by human body, with the gastric fluid and intestinal fluid have higher bioaccessibility to TC/CIP from PP microfiber surface. Pepsin in human gastric fluids and trypsin in human intestinal fluids are demonstrated to be the primary constituents governing the bioaccessibility potential of TC/CIP from PP microfiber surface. Molecular docking coupled with molecular dynamic simulation were then utilized to unravel the bioaccessibility mechanism of microfiber associated antibiotics in the human gastrointestinal fluids and discovered that pepsin/trypsin in the gastrointestinal fluid is subjected to combine with TC/CIP via hydrogen bond and hydrophobic interaction forces, weakening the sorption affinity of the PP microfiber with TC/CIP, resulting in the release of TC/CIP to the aqueous solution. Our findings highlighted that microplastic ingestion increase the risk to human health posed by microplastic-associated harmful co-contaminants adsorbing on the surface of plastic individuals. © 2023, The Authors. All rights reserved.

关键词： Antibiotics

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Electrically Driven Enhancement on Selective Adsorption of Nitrate from Wastewater: Synergism of Functional Groups and Micropores

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SSRN 2024年

作者： Ge, Yu Wang, Yue Chen, Yanqi Xu, Xinbing Liu, Zifan Yin, Zhonglong Dai, Yong Liu, Fuqiang Yang, Weiben Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional Materials School of Chemistry and Materials Science Nanjing Normal University Nanjing210023 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China School of Chemistry and Chemical Engineering Yancheng Institute of Technology Yancheng China

In the presence of coexisting ions, the limited selectivity hampers the application of NO3- adsorption. Herein, a series of NO3- adsorbents featuring adjustable degrees of functional groups and pore structures were synthesized to explore their structure-activity relationship at atomic level. The effects of pore sizes, functional groups, and applied voltage on the selective removal of NO3- were systematically investigated. Theoretical calculations and experiments confirmed that pore sieving effect and electrostatic attraction provided by functional groups synergically enhance NO3- selectivity. The applied voltage changes the interfacial microenvironment of adsorbent and improves the interfacial electron transmission, thus promoting NO3- transfer and enrichment on adsorbent surface. Meanwhile, increasing electrostatic attraction can not only increase the adsorption capacity but also improve the selective screening of anions by micropores. Driven by an external voltage of 1.2V, NO3- selectivity of ZIF-8-C-Q-2 nearly doubles. Under higher voltage, ZIF-8-C-Q-2 exhibits lower charge transfer resistance and higher ion diffusion capacity, which is conducive to capturing electrolyte ions (NO3-), thereby enhancing its adsorption capacity and selectivity. This study provides a novel insight into synergism of functional groups and micropores for selective adsorption of NO3in electrosorption mode. © 2024, The Authors. All rights reserved.

关键词： Adsorption

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Distribution patterns and influencing factors of PFAS in soils: A meta-analysis

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Environmental Research 2025年 279卷 121806页

作者： Yang, Xin Song, Chenzhuo Ren, Mingxue Kong, Yi Cui, Xinyi State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

Due to their high emission and persistence, per- and polyfluoroalkyl substances (PFAS) are ubiquitously distributed in the environment, with soil increasingly serving as a major medium for PFAS. Currently, research on the environmental distribution of PFAS primarily focuses on surface water and groundwater, while systematic global investigations into PFAS distribution in soil remain limited. In this study, we collected PFAS concentrations data from literatures published in 2006–2024 and Map of Forever pollution in Europe. PFAS concentrations in global soil exhibited spatial heterogeneity (n.d. – 1838 ng/g), with relatively higher levels in Europe, the U.S., and Eastern China. For temporal trend, PFOA, PFHxS, and PFOS generally decreased in the time span of 2005–2019, but the declining trend was relatively sharper in the U.S. compared with China. The meta-analysis indicated that soil properties, including soil texture, organic carbon content, total nitrogen content, and pH, as well as socioeconomic levels such as GDP per capita, per capita consumption expenditure, population density, and industrial proportions, were key factors affecting the distribution of PFAS in soil. Emerging PFAS showed regional differences in detection frequencies, with HFPO-DA (63.84 %–100 %) and 6:2 Cl-PFESA (69.38 %–100 %) predominating in China, 6:2 FTAB (78 %) in the U.S, PreFOSs and PAPs (90 %–100 %) in Europe. This study provides information on the current status of PFAS pollution in soil and key factors affecting its regional distribution, which is beneficial for strengthening the investigation of PFAS soil pollution in areas with less research and developing control and management strategies for high pollution areas. © 2025 Elsevier Inc.

关键词： Groundwater pollution

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A Stochastic Exposure Model Integrating Random Forest and Agent-Based Approaches: Evaluation for Pm2.5 in Jiangsu, China

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SSRN 2022年

作者： Zhou, Qi Wang, Xin Shu, Ye Sun, Li Jin, Zhou Ma, Zongwei Liu, Miaomiao Bi, Jun Kinney, Patrick L. State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing China Department of Environmental Health School of Public Health Boston University BostonMA United States

This research proposes an Activity Pattern embedded Air pollution Exposure Model (AP2EM), based on survey data of when, where, and how people spend their time and indoor/outdoor ratios for microenvironments. AP2EM integrates random forest and agent-based approaches to simulate the stochastic exposure to outdoor fine particulate matter (PM2.5) along with indoor and in-vehicle PM2.5 of outdoor origin. The R2 of the linear regression between the model's calculations and personal measurement was 0.65, which was more accurate than the commonly-used aggregated exposure (AE) model and the outdoor exposure (OE) model. The population-weighted PM2.5 exposure estimated by the AP2EM was 36.7 μg/m3 in Jiangsu, China, during 2014-2017. The OE model overestimated exposure by 54.0%, and the AE model underestimated exposure by 6.5%. These misestimate reflect ignorance of traditional studies on effects posed from time spent indoors (~85%) and doing low respiratory rate activities (~93%), problems of biased sampling, and neglecting low probability events. The proposed AP2EM treats activity patterns of individuals as chains and uses stochastic estimates to model activity choices, providing a more comprehensive understanding of human activity and exposure characteristics. Overall, the AP2EM is applicable for other air pollutants in different regions and benefits China's air pollution control policy designs. © 2022, The Authors. All rights reserved.

关键词： Stochastic systems

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Frontiers in high entropy alloys and high entropy functional materials

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Rare Metals 2024年第10期43卷 4639-4776页

作者： Wen-Tao Zhang Xue-Qian Wang Feng-Qi Zhang Xiao-Ya Cui Bing-Bing Fan Jia-Ming Guo Zhi-Min Guo Rui Huang Wen Huang Xu-Bo Li Meng-Ru Li Yan Ma Zhi-Hua Shen Yong-Gang Sun De-Zhuang Wang Fei-Yang Wang Li-Qiang Wang Nan Wang Tian-Li Wang Wei Wang Xiao-Yang Wang Yi-Han Wang Fu-Jie Yu Yu-Zhen Yin Ling-Kun Zhang Yi Zhang Jian-Yang Zhang Qi Zhao Yu-Ping Zhao Xin-Dong Zhu Yasir Sohail Ya-Nan Chen Tao Feng Qi-Long Gao Hai-Yan He Yong-Jiang Huang Zeng-Bao Jiao Hua Ji Yao Jiang Qiang Li Xiao-Ming Li Wei-Bing Liao Huai-Jun Lin Hui Liu Qi Liu Qing-Feng Liu Wei-Di Liu Xiong-Jun Liu Yang Lu Yi-Ping Lu Wen Ma Xue-Fei Miao Jie Pan Qing Wang Hong-Hui Wu Yuan Wu Tao Yang Wei-Ming Yang Qian Yu Jin-Yu Zhang Zhi-Gang Chen Liang Mao Yang Ren Bao-Long Shen Xun-Li Wang Zhe Jia He Zhu Zhen-Duo Wu Si Lan School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China Jiangsu Key Laboratory for Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China Department of Physics City University of Hong KongHongKong 999077China School of Materials Science and Engineering Tianjin UniversityTianjin 300072China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Department of Mechanical Engineering Research Institute for Advanced ManufacturingThe Hong Kong Polytechnic UniversityHong Kong 100872China Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China Institute of Advanced Wear&Corrosion Resistance and Functional Materials Jinan UniversityGuangzhou 510632China School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhou 221116China School of Physical Sciences Great Bay UniversityDongguan 523000China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Beijing Advanced Innovation Center for Materials Genome Engineering Research Institute for Carbon NeutralityUniversity of Science and Technology BeijingBeijing 100083China Department of Mechanical Engineering The University of Hong KongHong Kong 999077China School of Computing Macquarie UniversitySydney 2113Australia Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China State Key Laborato

Owing to their exceptional properties,high-entropy alloys(HEAs)and high-entropy materials have emerged as promising research areas and shown diverse ***,the recent advances in the field are comprehensively reviewed,organized into five *** first section introduces the background of HEAs,covering their definition,significance,application prospects,basic properties,design principles,and *** subsequent section focuses on cutting-edge high-entropy structural materials,highlighting developments such as nanostructured alloys,grain boundary engineering,eutectic systems,cryogenic alloys,thin films,micro-nano-lattice structures,additive manufacturing,high entropy metallic glasses,nano-precipitate strengthened alloys,composition modulation,alloy fibers,and refractory *** the following section,the emphasis shifts to functional materials,exploring HEAs as catalysts,magneto-caloric materials,corrosion-resistant alloys,radiation-resistant alloys,hydrogen storage systems,and materials for ***,the review encompasses functional high-entropy materials outside the realm of alloys,including thermoelectric,quantum dots,nanooxide catalysts,energy storage materials,negative thermal expansion ceramics,and high-entropy wave absorption *** paper concludes with an outlook,discussing future directions and potential growth areas in the *** this comprehensive review,researchers,engineers,and scientists may gain valuable insights into the recent progress and opportunities for further exploration in the exciting domains of high-entropy alloys and functional materials.

关键词： High entropy alloys Cutting-edge structural materials Cutting-edgefunctional materials

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