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SSRN 2024年

作者： Zhang, Zhipeng Fan, Kaiming Liu, Yanling Wang, Xiaoping Xia, Shengji Taizhou University School of Civil Engineering & Architecture Zhejiang Taizhou318000 China State Key Laboratory of Pollution Control and Resources Reuse Advanced Membrane Technology Center Tongji University Shanghai200092 China Department of Environment Yangtze Delta Region Institute of Tsinghua University Jiaxing Zhejiang314006 China Key Laboratory of Yangtze River Water Environment Ministry of Education Tongji University Shanghai200092 China

Nanofiltration technology is a promising solution for water purification, yet membrane scaling remains a major challenge that compromises both durability and efficiency. In this work, a thin-film nanocomposite (TFN) membrane was fabricated by incorporating molybdenum disulfide quantum dots (MoS2 QDs) into aqueous phase of piperazine (PIP) monomers. A diffusion experiment and theoretical calculations revealed that the MoS2 QDs effectively reduced the diffusion rate of PIP due to their hydrophilic and electrostatic properties. Thus, compared with the control membrane, the TFN membranes exhibited a thinner, more hydrophilic, and less dense polyamide selective layer with enhanced electronegativity. The optimal TFN-5 membrane displayed a water permeance of 17.6 L m⁻²·h⁻¹·bar⁻¹ and excellent selectivity with CaCl2/Na2SO4 ratio (114.8), surpassing most previously reported NFMs. Additionally, the TFN-5 membrane also maintained structure and performance stability in simulated mixed salt solution and 120 h continuous operation tests. These improvements endowed the TFN-5 membrane with superior scaling resistance, resulting in only a 12% flux decline and minimal gypsum deposition after exposure to a high-salinity mixed salt solution. This work shed light on the design and fabrication of high-performance nanofiltration with enhanced scaling resistance for drinking water treatment applications. © 2024, The Authors. All rights reserved.

关键词： Nanocrystals

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Sorption kinetics of parent and substituted PAHs for low-density polyethylene（LDPE）:Determining their partition coefficients between LDPE and water(KLDPE) for passive sampling

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Journal of Environmental Sciences 2020年第1期32卷 349-360页

作者： Pei Lei Jinjie Zhu Ke Pan Hong Zhang State Key Laboratory of Pollution Control and Resources Reuse School of the EnvironmentNanjing UniversityNanjing 210023China State Key Laboratory cf Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Institute for Advanced Study Shenzhen UniversityShenzhen 518060China University of Chinese Academy of Sciences Beijing 100049China

Low-density polyethylene(LDPE)has been widely used as a sorbent for passive sampling of hydrophobic organic contaminants(HOCs)in aquatic ***,it has seen only limited application in passive sampling for measurement of freely dissolved concentrations of parent and substituted PAHs(SPAHs),which are known to be toxic,mutagenic and ***,the 16 priority PAHs and some typical PAHs were selected as target compounds and were simultaneously determined by gas chromatography–mass spectrometer(GC–MS).Some batch experiments were conducted in the laboratory to explore the adsorption kinetics of the target compounds in LDPE *** results showed that both PAHs and SPAHs could reach equilibrium status within19–38 days in sorption kinetic *** coefficients of partitioning between LDPE film(50μm thickness)and water(KLDPE)for the 16 priority PAHs were in good agreement with previously reported values,and the values of KLDPEfor the 9 SPAHs are reported in this study for the first *** linear relationships were observed,i.e.,log KLDPE=0.705×log KOW+1.534 for PAHs(R^2=0.8361,p<0.001)and log KLDPE=0.458×log KOW+3.092 for SPAHs(R^2=0.5609,p=0.0077).The selected LDPE film was also proven to meet the condition of"zero sink"for the selected target *** results could provide basic support for the configuration and in situ application of passive samplers.

关键词： Low-density polyethylene(LDPE) PAHs Substituted PAHs(SPAHs) Freely dissolved concentrations Passive sampling

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Magnetic resin-enhanced peroxymonosulfate activation in a 3D particle electrode system for synergistic removal of sulfamethazine, antibiotic resistant bacteria, and antibiotic resistance genes: The key role of chloride ions in boosting O 2 generation

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Chemical Engineering Journal 2025年 518卷

作者： Xing Sun Jiehui Du Changchun Yan Xuejiang Wang Siqing Xia 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 Shanghai 200092 PR China

The three-dimensional (3D) electro-activated persulfate system has emerged as a highly effective technology for eradicating antibiotics, antibiotic resistant bacteria (ARB), resistance genes (ARGs), offering a promising solution to combat the growing issue of antibiotic resistance. In this study, a novel magnetic resin (NDMP) was employed as particle electrodes to construct a 3D particle electrode system for persulfate activation (NDMP-3DPE/PMS). The system achieved synergistic removal of sulfamethazine (SMT), ARB and ARGs through singlet oxygen( 1 O 2 )-dominated non-radical pathway, with no hydroxyl radicals (•OH) or sulfate radicals (SO 4 •− ) detected. This was attributed to electron transfer between NDMP and PMS, which facilitated the self-decomposition of PMS and enhanced 1 O 2 generation. During SMT degradation, the presence of chloride ions (Cl − ) in the system enhanced the generation of 1 O 2 , thereby improving SMT removal efficiency. This enhancement is attributed to the attack of the electronegative oxygen atom in HSO₅ − by non-polar Cl₂, which originates from Cl − , leading to additional 1 O 2 formation. Moreover, 1 O 2 attacks ARB, causing bacterial inactivation. And the leakage of intracellular DNA carrying ARGs is further compromised by 1 O 2 , thereby inhibiting the horizontal gene transfer of ARGs. Density functional theory (DFT) and liquid chromatography-mass spectrometry (LC-MS) were utilized to identify degradation intermediates. Toxicity assessment based on quantitative structure-activity relationship (QSAR) and cell counting kit-8 (CCK-8) revealed that most intermediates exhibited reduced toxicity. This study provides an effective and promising strategy for the comprehensive removal of antibiotics, ARB, and ARGs.

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Orderly Porous Covalent Organic Frameworks-based Materials:Superior Adsorbents for Pollutants Removal from Aqueous Solutions

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The Innovation 2021年第1期2卷 106-134页

作者： Xiaolu Liu Hongwei Pang Xuewei Liu Qian Li Ning Zhang Liang Mao Muqing Qiu Baowei Hu Hui Yang Xiangke Wang School of Life Science Shaoxing UniversityHuancheng West Road 508Shaoxing 312000P.R.China College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206P.R.China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210093P.R.China

Covalent organic frameworks(COFs)are a new type of crystalline porous polymers known for chemical stability,excellent structural regularity,robust framework,and inherent porosity,making them promising materials for capturing various types of pollutants from aqueous *** review thoroughly presents the recent progress and advances of COFs and COF-based materials as superior adsorbents for the efficient removal of toxic heavy metal ions,radionuclides,and organic *** about the interaction mechanisms between various pollutants and COF-based materials are summarized from the macroscopic and microscopic standpoints,including batch experiments,theoretical calculations,and advanced spectroscopy *** adsorption properties of various COF-based materials are assessed and compared with other widely used *** commonly used strategies to enhance COF-based materials’adsorption performance and the relationship between structural property and sorption ability are also ***,a summary and perspective on the opportunities and challenges of COFs and COF-based materials are proposed to provide some inspiring information on designing and fabricating COFs and COF-based materials for environmental pollution management.

关键词： covalent organic frameworks(COFs) heavy metal ions radionuclides organic pollutants interaction mechanism

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Degradation of Enrofloxacin Antibiotic by Ultraviolet Activated Persulfate (Uv/Pds) Advanced Oxidation Process: Performance, Mechanism, Pathways

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SSRN 2023年

作者： Chen, Juxiang Wang, Kai Xie, Wanying Gao, Yuqiong Liao, Zhenliang Wang, Lei Gao, Naiyun College of Civil Engineering and Architecture Xinjiang University Xinjiang Urumqi830017 China School of Environment and Architecture Shanghai University of Technology Shanghai200093 China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

Enrofloxacin (ENR) is continually detected in natural water environment, becoming one threaten if treating untimely. Performance and mechanism of ENR degradation by ultraviolet (UV)/persulfate (PDS) technology was systematically investigated. Degradation efficiency by UV/PDS was 5.4 times of UV alone, due to the higher rate constant (kobs) of 5.848×10-2 min-1. Quencher experiments showed, ·SO4- and ·OH were the major free radicals generated by UV/PDS, and the corresponding contribution rate on degrading ENR was 65.2% and 17.2%. Moreover, ENR degradation efficiency of UV/PDS positively influenced by high PDS dosage (20 mg/L) and pH (9.0), but negatively affected by high ENR dose (15 mg/L). Results of electrical energy per order (EE/O) demonstrated, UV/PDS was less energy consumption and more economical. Results of response surface model (RSM) illustrated that ENR degradation efficiency was less negatively influenced, when inorganic ions like Cl-, HCO3- and NO3- was 7, 2 and 3 mM, respectively. Using density functional theory (DFT) and Fukui functions to analyze the possible active sites of ENR, meanwhile using intermediate products to study the pathways of ENR degradation by UV/PDS process. These results illustrated that C28 and C30 on piperazine ring of ENR was attacked by UV/PDS process, according to the substitution and de-alkylation. © 2023, The Authors. All rights reserved.

关键词： Antibiotics

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Transformation and Characterization of Zooplankton-Aquatic Environment Response Mechanisms in Drinking Water source Watershed

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SSRN 2025年

作者： Yin, Jingyun Xia, Jihong Dou, Chuanbin Wang, Yue Mao, Qianqian Liu, Zhicheng Lu, Yuanshuo Hu, Tao Yang, Huijie Ren, Yifei Lin, Guofu State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China College of Agricultural Science and Engineering Hohai University Jiangsu Nanjing210098 China College of Water Conservancy and Hydropower Engineering Hohai University Jiangsu Nanjing210098 China Putian River Management Center Fujian Putian351100 China

Capturing the spatial and temporal dynamics of zooplankton and aquatic environmental elements in drinking water source watersheds is pivotal for the scientific, holistic, and precise development of a reservoir ecological health assessment system. Additionally, exploring the response mechanism between zooplankton and the aquatic environment is crucial. Nevertheless, research on the zooplankton-aquatic environment interaction in the context of cascade reservoirs as drinking water sources remains limited. This study delves into the spatial distribution and temporal fluctuations of zooplankton communities, as well as the underlying drivers of seasonal turnover in the drinking water sources of a cascade reservoir system. Utilizing co-occurrence network analysis and structural equation modeling, we found that the seasonal turnover rates for Cladocera, Copepoda, and Rotifera were 58.72%, 52.49%, and 54.96%, respectively. The spatial coefficient of variation was highest for Cladocera (73.31%), followed by Copepoda (62.58%) and Rotifera (56.82%). The structural equation model revealed that various aquatic environmental factors played distinct roles in influencing zooplankton communities, with the picocyanobacteria index (0.378), water temperature (0.362), and permanganate index (0.350) being particularly significant. Furthermore, the zooplankton-aquatic environment interaction exhibited diverse response patterns under changing temporal and spatial conditions. © 2025, The Authors. All rights reserved.

关键词： Reservoirs (water)

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Is Biochar a Reliable Catalyst for Activating Persulfate? Damage of Biochar During Catalytic Process

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SSRN 2022年

作者： Wan, Jiang Wang, Gehui Liang, Weiyu Peng, Cheng Zhang, Wei Fu, Rongbing State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resource and Environmental Engineering East China University of Science and Technology Shanghai 200237 China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China

Biochar has been believed as a low cost and metal-free catalysts for persulfate activation. However, the performance decreases of biochar after participating in the reaction, and the extent of damage to biochar remain poorly understood due to its intricate carbon structure. In this study, the two biochars (cotton stalk and walnut shell biochar) were used to activate PDS for sulfadimidine degradation, and multiple characterization methods were used to determine the damage of biochar. The comparative experiments of biochar, recycled biochar and PDS corroded biochar in catalytic reaction showed that the performance of biochars decreased by 37.5%-65.3%. After participating in the catalytic reaction, the unstable carbon in biochar was lost, and the surface of cotton stalk biochar was oxidized, which reduced its affinity to organic matter. CO2 physisorption showed that the pore structure of biochars barely changed. However, for walnut shell biochar, its adsorption capacity of nitrogen decreased obviously. Moreover, electrochemical tests showed that the conductivity of walnut shell biochar was reduced, which may lead to a decrease in the efficiency of the non-free radical pathway. Overall, the influences of catalytic process on biochar cannot be ignored, so more efforts are needed to make biochar an efficient and sustainable PS activator. © 2022, The Authors. All rights reserved.

关键词： Pore structure

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Migration and Transformation of Pahs Mixture in Contaminated Sites and Their Interactions with Native Soil Organisms

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SSRN 2023年

作者： Li, Xiaoyu Zhang, Shengnan Guo, Ruixue Xiao, Xuejing Liu, Boying Allam, Ahmed A. Ajarem, Jamaan S. Maodaa, Saleh Qu, Ruijuan State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China Zoology Department Faculty of Science Beni-Suef University Beni-Suef Egypt Zoology Department College of Science King Saud University Riyadh Saudi Arabia

Soil contamination of polycyclic aromatic hydrocarbons (PAHs) especially caused by the mixture of two or more PAHs has raised great environmental concerns. However, research on the migration and transformation processes of PAHs in soils and their interactions with native plants and microbial communities are limited. In this work, soil samples from uncontaminated sites around the industrial parks in Handan, Hengshui and Shanghai were artificially supplemented with three concentrations of four PAHs mixture, namely Anthracene (Ant), 9-Chloroanthracene (9-ClAnt), Benzopyrene (BaP), and Chrysene (Chr), and planted with ryegrass to investigate the degradation of PAHs and its interaction with native soil organisms in the constructed ryegrass-microbe-soil microcosmic system. Under PAHs stress, Ryegrass showed the best growth status in Shanghai soil. The bacterial and fungal communities in soil were affected by PAHs, and their species diversity and relative abundance changed significantly after exposure to different concentrations of PAHs. Microorganisms and plants could participate in the natural degradation process of PAHs in soil through absorbing and then accumulating or metabolizing them. On the 56th day, the contents of BaP, Chr, and Ant decreased significantly in the soil, while the degradation of 9-ClAnt was very limited. In addition, a total of 19 intermediates including hydroxylation and carboxylated compounds were identified during the degradation process. The present research would help clarifying the potential interactions between PAHs and native organisms in contaminated sites, which may provide fundamental information for evaluating the potential transformation risks of PAHs in natural environment. © 2023, The Authors. All rights reserved.

关键词： Polycyclic aromatic hydrocarbons

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Simultaneous Removal of Chlorite and Coexisting Emerging Organic Contaminants by Sulfite: Kinetics and Mechanisms

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SSRN 2023年

作者： Yuan, Yangchun Shao, Binbin Dong, Hongyu Guan, Xiaohong State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste School of Ecological and Environmental Sciences East China Normal University Shanghai200241 China

The inevitable formation of chlorite (ClO2–) and the ineffective degradation of some emerging organic contaminants (EOCs) during chlorine dioxide disinfection have aroused increasing concern about their adverse effects on human health. In this study, the kinetics and mechanisms of simultaneous removal of ClO2– and coexisting EOCs by sulfite (S(IV)) were investigated. Under aerobic conditions, ClO2– and coexisting EOCs could be effectively removed by S(IV) at pH 6.5–7.5, and their removal rates decreased as pH increased. ClO3– was generated in this process but its amount decreased with increasing pH. Many lines of evidence verified that the reaction of ClO2– with HSO3– and H+ generated SO3•− and ClO•, and the generated ClO• was rapidly quenched by S(IV) to form OCl– and SO3•−. Subsequently, SO3•− quickly reacted with O2 to form SO5•−, which was further transformed into SO4•−. SO4•− was the dominant reactive oxidant contributing to the degradation of coexisting EOCs and the formation of ClO3–. Using S(IV) to simultaneously control ClO2– and coexisting EOCs in water treatment is a promising approach because its performance was slightly affected by the water matrix. © 2023, The Authors. All rights reserved.

关键词： Kinetics

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Multi-Component Removal of Pb(Ii), Cd(Ii) and As(V) over Core-Shell Structured Nanoscale Zero-Valent Iron@Mesoporous Hydrated Silica in Contaminated Water and Soil

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SSRN 2021年

作者： Ma, Qian Teng, Wei Sun, Yu Chen, Yanyan Xue, Yinghao Chen, Xiaoqian Zhang, Chuning Zhang, Hua Fan, Jianwei Qiu, Yuping Fu, Rongbing State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

The application of nanomaterials for the removal of heavy metals has received a great deal of attention because of their high efficiencies in the environment. But it is difficult to remove multiple heavy metals simultaneously with high efficiency and stability. Herein, the core-shell structured nanoscale zero-valent iron encapsulated with mesoporous hydrated silica (nZVI@mSiO 2 ) were prepared for efficient removal of heavy metals including Pb(II), Cd(II), and metalloid As(V). The structural and textural features of nZVI@mSiO 2 were characterized by SEM, XRD, FTIR and XPS. The nZVI@mSiO 2 -1 uniformly with a high surface area (147.7 m 2 ·g -1 ) has a nZVI core with the particle size of 20-60 nm and a modified dendritic mesoporous shell of 19 nm. The removal of heavy metals is found to be pH dependent. The maximum adsorption capacity of nZVI@mSiO 2 -1 for Pb(II), Cd(II), and As(V) reached 372.2 mg·g -1 , 105.2 mg·g -1 , and 115.2 mg·g -1 with a pH value at 5.0, respectively. Pb(II) and As(V) removal on the material included adsorption and reduction while Cd(II) removal mainly included adsorption and precipitation. In addition, the competitive relationship between the coexistence of two heavy metals was discussed and the material showed an excellent performance on the real contaminated soil. The dissolved Fe during the reaction showed that mSiO 2 played a role in enhanced stability of nZVI. It suggests that nZVI@mSiO 2 can be an effective material for removal of heavy metals in water and soil. © 2021, The Authors. All rights reserved.

关键词： Silica

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