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Validation and Application of Diffusive Gradient in Thin-Film (Dgt) Equipped Novel Cyclodextrin Polymer Gels for Monitoring Endocrine Disrupting Chemicals (Edcs) and Environmental Risk Assessment in the Taihu Lake Basin

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SSRN 2021年

作者： Zhu, Xingqi Jiang, Lu Ji, Xiaowen Zhang, Delin Xu, Guizhou Wu, Daise Li, Aimin Xie, Xianchuan State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing China Nanjing University China Key Laboratory of Poyang Lake Environment and Resource Utilization Ministry of Education School of Resources Environmental & Chemical Engineering Nanchang University Nanchang330031 China Jiangxi Nanxin Environmental Protection Technology Co. LTD Jiangxi Province Jiujiang City330300 China

Taihu Lake is the most important drinking water source of the major cities in the Yangtze River Delta. The pollution of endocrine disruptors (EDCs)in Taihu Lake has been increasing recently, the accurate determination is an important guide for predicting its health risks and developing appropriate controls. Monitoring organic pollutants in water using the diffusive gradient in thin film technique (DGT) has attracted much attention due to more accuracy and convenience than the grab sampling methods. In this study, a novel cyclodextrin polymer (CDP) synthesized by the simple and green method in water was taken as an adsorbent for the binding gel. Four endocrine-disrupting chemicals (EDCs), bisphenol A (BPA), 17α-ethinylestradiol (EE2), 17β-estradiol (E2), and estriol (E3), were taken as models to determine the diffusion coefficients (4.68×10-6, 3.38×10-6, 3.34×10-6 and 4.31×10-6 cm2/s) and to test the performance of DGT, such as adsorption capacity and deployment time (1-5 day). The assembled CDP-DGT was adopted to determine four EDCs in a simulated water environment (3-9 of pH, 0.001-0.5M of ionic strength (IS), and dissolved organic matter (DOM) of 0-20mg/L). The ability of CDP-DGT sampling was verified in the Jiuxiang River and was carried out for a large-scale field application of in situ sampling EDCs in Taihu Lake basin. The results show that the total EDCs concentration range and the estradiol equivalent concentrations (EEQ) in Taihu Lake and its main rivers are 2.78 ng/L to 11.08 ng/L and 2.62 ng/L to 10.91 ng/L, respectively. The risk quotients (RQs) of all sampling sites in the region were greater than 1, indicating that EDCs pose a serious threat to aquatic organisms in the area. Therefore, the monitoring of EDCs in the Taihu Lake basin should be further strengthened. © 2021, The Authors. All rights reserved.

关键词： Risk assessment

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Simultaneous Removal of Sb(Iii) and Sb(V) from Mining Wastewater by Reduced Graphene Oxide/Bimetallic Nanoparticles

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SSRN 2021年

作者： Chen, Wei Lin, Ze Chen, Zhenxian Weng, Xiulan Owens, Gary Chen, Zuliang Fujian Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and Engineering Fujian Normal University Fujian Province Fuzhou350007 China Fujian Normal University China Environmental Contaminants Group Future Industries Institute University of South Australian Mawson LakesSA5095 Australia

Antimony (Sb) contamination is a significant environmental issue in mining impacted areas, where the use of nanomaterials to remove such metalloid species has attracted much research attention. In this study, the simultaneous removal of Sb(III) and Sb(V) was investigated using a reduced graphene oxide/Fe/Ni (rGO-Fe/Ni NPs) composite. Compared to rGO the composite exhibited enhanced removal efficiency. For rGO-Fe/Ni NPs that the removal efficiencies were 100% for Sb (III) and 70.4% for Sb(V), while for rGO, the removal efficiencies were 85.1% for Sb(III) but only 51.2% for Sb(V). This indicated that Fe/Ni enhanced the simultaneous removal of Sb(III) and Sb(V). Advanced characterization via SEM and XPS before and after exposure to Sb indicated that both Sb(III) and Sb(V) were adsorbed on to the surface of rGO-Fe/Ni NPs, followed by oxidation of Sb(III) to Sb(V). Adsorption and oxidation kinetics both conformed to pseudo-second order models, where the mechanism for the simultaneous removal of Sb(III) and Sb(V) by rGO-Fe/Ni NPs involved a combination of both adsorption and oxidation. Moreover, the practical removal efficiency of rGO-Fe/Ni was not limited to Sb, since while rGO-Fe/Ni removed 81% of antimony species, it could also remove As (71.3%), Pb (88.7%), and Cd (94.3%) from a mining wastewater. The composite was also highly reusable with removal efficiency for Sb(III) as high as 72.7% after 4 cycles of use. Thus, rGO-Fe/Ni NPs has significant potential for the practical removal of Sb species and other heavy metal(loid)s in mining impacted wastewaters. © 2021, The Authors. All rights reserved.

关键词： Graphene

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controlling Nucleophilic Emerging Organic Contaminants (Eocs) Using an Inorganic Oxidizing Coagulant (Ioc) Based on the Synergistic Oxidation-Induced Coagulation Mechanisms

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SSRN 2024年

作者： Wang, Lili Xu, Weiying Xu, Zhenghe Zhu, Yuanji Song, Yan Wang, Dongsheng Xin, Xiaodong Jia, Ruibao Xu, Xing School of Water Conservancy and Environment University of Jinan No. 336 Nanxinzhuang Western Road Shandong Jinan250022 China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Science Chinese Academy of Science No. 18 Shuangqing Road Beijing100085 China Economic & Technology Research Institute of State Grid Shandong Electric Power Company No. 111 Weishi Road Shandong Jinan250021 China Shandong Province City Water Supply and Drainage Water Quality Monitoring Center No 5111 Aoti Middle Road Shandong Jinan250013 China Department of Environmental Engineering College of Environmental & Resource Sciences Zhejiang University No 866 Yuhangtang Road Zhejiang Hangzhou310013 China Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Shandong Qingdao266237 China Shandong Jianzhu University China

Coagulation is not effective in treatment of emerging organic contaminants (EOCs) contaminated water and wastewater, and many researches focus on the hybrid technologies. In this study, a multifunctional inorganic oxidizing coagulant (IOC) was developed by a simple alkaline co-polymerization method to increase the efficiency and feasibility of coagulation in elimination of low molecular weight (MW) organic compounds, which were demonstrated by eight kinds of representative EOCs. The IOC present exceptional removal capabilities for hydrophilic with low logKow and nucleophilic (high NI) EOCs, like sulfamethazine (SMZ), tetracycline (TC), and ciprofloxacin (CIP), achieving removal efficiencies of 45-95%. The dynamic coagulation investigation conducted through continuous monitor on floc formation and growth demonstrated that large floc played minor role in EOCs removal. Instead, an obvious positive correlation between removal efficiency (REOCs) and floc growth rate (Sfloc), which was associated with the reactivity of EOCs with coagulant, was observed. Combined with the electron paramagnetic resonance (EPR) and ultra-high-performance liquid chromatography high-resolution mass spectrometry (UHPLC-HRMS) results, an innovative coagulation mechanism for EOCs abatement by IOC, namely oxidation-induced coagulation was proposed. Oxidizing agent in IOC promoted the formation of activate intermediates through nonradical pathway, which were more prone to complexation with aluminum than their original condition. Comparatively, traditional charge neutralization, adsorption and sweeping mechanisms involved in the aluminum sulfate (AS) and poly-aluminum chloride (PACl) coagulation systems, which generally lead to large but invalid flocs, turned out to inapplicable to EOCs removals. This study provides a novel strategy and inorganic coagulant for EOCs-contained water and wastewater treatments based on the oxidation-induced complexation mechanism, which was demonstrated to be a promisin

关键词： Aluminum chloride

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Coagulation and Membrane Mechanism of Al Species in Removing Humic Acid: A Dynamics Process Analysis

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SSRN 2022年

作者： Wang, Wenyu Li, Ruihua Bu, Fan Gao, Yue Gao, Baoyu Yue, Qinyan Yang, Min Li, Yi School of Environmental Science and Engineering Qilu University of Technology Shandong Academy of Sciences Jinan250353 China Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao266000 China School of Environmental and Municipal Engineering North China University of Water Resources and Electric Power Zhengzhou450000 China Marine Science Research Institute of Shandong Province Qingdao266104 China

The pH conditions affected the binding sites and complexation ability of Al species and humic acid (HA), resulting in the difference of coagulation and membrane fouling mechanism. It is important to explore the dynamic process of coagulation for the complexation mechanism of Al species and HA. In this study, three Al species (Ala/Alb/Alc) were used to control ultrafiltration (UF) process. Then, the removal efficiency of Ala for DOC was better than that of Alb and Alc, that is, the removal performance of suspended and dissolved organic matter was better for Ala. Through the analysis of coagulation dynamic process and membrane resistances, the flocs formed were smaller size and grow slowly to the equilibrium stage at pH 4, which was easy to cause membrane fouling by concentration polarization. With the pH increasing to a neutral condition, the flocs had a large size and loose structure, and then the porous cake layer was easy to be removed by physical cleaning, leading to the membrane fouling mainly due to pore plugging. Under alkaline conditions, flocs with small size and dense structure were mainly formed by sweeping, which resulted in the cake layer as the main cause of membrane fouling. This study is helpful to optimize the process of HA removal by coagulation-UF, and provides technical support for the coagulation and membrane mechanism of Al species and HA under different pH conditions. © 2022, The Authors. All rights reserved.

关键词： Coagulation

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The influences of iron plaque on nitrogen emissions from paddy soils under different water management practices

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European Journal of Soil Biology 2025年 125卷

作者： Liu, Ting Liu, Mengting Zhang, Zixian Yao, Jinzhi Qin, Shuping Guo, Rongzhong Xiao, Xiao Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization Nanchang Hangkong University Nanchang 330063 China Key Laboratory of Natural Resources Monitoring and Supervision in Southern Hilly Region Ministry of Natural Resources Hunan Changsha 410118 China Key Laboratory of Soil Ecology Key Laboratory of Agricultural Water Resources Center for Agricultural Resources Research Institute of Genetic and Developmental Biology The Chinese Academy of Sciences 286 Huaizhong Road Hebei Shijiazhuang 050021 China Changsha Environmental Protection College Hunan Changsha 410004 China

Iron plaque (IP), commonly found on rice roots, influences nitrogen emissions, particularly nitrous oxide (N2O) and dinitrogen (N2) gases, under different water management practices. However, the mechanisms underlying... 详细信息

Iron plaque (IP), commonly found on rice roots, influences nitrogen emissions, particularly nitrous oxide (N₂O) and dinitrogen (N₂) gases, under different water management practices. However, the mechanisms underlying this influence remain unclear. In this study, the cylinder-in-cylinder method was employed to determine nitrogen emissions from rice soils under alternate wetting and drying or continuous flooding conditions in a laboratory pot experiment. The effects of iron plaque on N₂O and N₂ emissions were investigated. It was found that iron plaque increased N₂O and N₂ emissions, particularly under continuous flooding conditions. The abundance of nosZ gene was positively related to N₂ emission, and the relationship was significant under continuous flooding condition (p ≤ 0.05). The presence of iron plaque increased the richness of nirS- and nosZ-type denitrifiers (p ≤ 0.001) and led to alteration in denitrifier community composition. Specifically, the relative abundance of Pseudomonas was increased (p ≤ 0.001), which probably influenced N₂O and N₂ emissions. These findings help to better understand the effects of iron plaque on N emissions from agricultural ecosystems. © 2025 Elsevier Masson SAS

关键词： Alternate wetting and drying Denitrifiers Dinitrogen Iron plaque Nitrous oxide

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Needle-like PVP@Ce/Zr-MOFs for the highly efficient selective of fluoride and phosphate from aqueous solution

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Separation and Purification Technology 2025年 371卷

作者： Liu, Ruilai Song, Jiangyan Zhang, Ziyi Ji, Lichang Yang, Weisen Zhao, Jinyun Jian, Shaoju Hu, Jiapeng Ma, Jie Fujian Provincial Key Laboratory of Eco-Industrial Green Technology Wuyi University Key Laboratory of Green Chemical Technology of Fujian Province University Wuyishan354300 China Research Center for Environmental Functional Materials State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China College of Environment and Safety Engineering Fuzhou University Fuzhou350001 China School of Civil Engineering Kashi University Kashi844000 China

Polyvinylpyrrolidone (PVP) dispersant was added to Ce/Zr metal–organic frameworks (MOFs), forming needle-like PVP@Ce/Zr-MOFs adsorbents via the hydrothermal method. The effects of solution pH, co-existing ions, reaction temperature, and PVP dosage on the performance of fluoride and phosphate elimination from aqueous solution were examined in batch adsorption experiments. The sorption behaviors were also revealed through adsorption thermodynamic and kinetic studies. The PVP@Ce/Zr-MOFs had an outstanding selectivity over a wide pH range. In addition, they selectively adsorbed phosphate and fluoride ions co-existing with common ions in simulated and real wastewater and maintained high efficiency in the existence of other anions. The sorption procedure was depicted with the pseudo-second order model and the Langmuir model. A mechanistic analysis revealed that fluoride and phosphorus were eliminated by PVP@Ce/Zr-MOFs via exchange interaction with hydroxide ions, electrostatic interactions with charged particles on the adsorbent surface, and the formation of strong inner-sphere complexes of Zr and Ce ions with the target phosphate and fluoride ions. © 2025 Elsevier B.V.

关键词： Metal ions

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Zif-Derived Non-Bonding Co/Zn Coordinated Hollow Carbon Nitride for Enhanced Removal of Antibiotic Contaminants by Perxymonosulfate Activation: Performance and Mechanism

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SSRN 2022年

作者： Sun, Yongjun Li, Xi Wang, Shiwen Chen, Pei Xu, Baokang Zhang, Xiao Xu, Yanhua Yu, Yang Zheng, Huaili Yu, Peng Zhou, Ru School of Environmental Science and Engineering Nanjing Tech University Nanjing211816 China Key Laboratory of Industrial Pollution Control and Resource Reuse of Jiangsu Province College of Environmental Engineering Xuzhou University of Technology Xuzhou221000 China College of Safety Science and Engineering Nanjing Tech University Nanjing211816 China Graduate School at Shenzhen Tsinghua University Shenzhen518055 China Key laboratory of the Three Gorges Reservoir Region's Eco-Environment State Ministry of Education Chongqing University Chongqing400045 China College of Urban Construction Nanjing Tech University Nanjing211816 China

Co-Zn-N-C catalyst (MCZC) with neighboring Co and Zn pairs anchored on hollow carbon nitride was constructed by the direct etching of zeolitic imidazolate frameworks (ZIFs) assembled with Co and Zn. Adequate characterizations and density functional theory (DFT) studies confirmed the successful construction of non-bonding Co and Zn pairs with enhanced electron transfer on Co sites by adjacent Zn sites. Based on the synergy of adjacent Co and Zn atom pairs, the MCZC/Perxymosulfate (PMS) system achieved 99.6% Tetracycline (TC) degradation in 24 min with a mineralization rate of 55.8% and PMS decomposition efficiency of 73.1%. DFT calculation based on the Fukui index identified the sites susceptible to attack by the active species. TC degradation pathways could be inferred, and reduced toxicity of intermediates was observed. This work provides new insights into the design of MOF-derived bimetallic catalysts and the importance of the interaction between adjacent metal active sites to catalytic performance. © 2022, The Authors. All rights reserved.

关键词： Chemical activation

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Robust porous PAN-MIL-101(Fe) nanofiber composite membranes for highly selective phosphate removal and recovery from water

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Separation and Purification Technology 2025年 375卷

作者： Xiaobo Xu Yaru Li Qiankun Xu Yi Ding Xianhuai Huang Huanting Wang Xianbiao Wang Anhui Province International Research Center on Advanced Building Materials School of Materials and Chemical Engineering Anhui Jianzhu University Hefei 230601 PR China Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse Anhui Jianzhu University Hefei 230601 PR China Department of Chemical and Biological Engineering Monash University Clayton VIC 3800 Australia

The water stability of metal–organic frameworks (MOFs) adsorbents is critical for efficient adsorption and recovery of target pollutants while avoiding secondary contamination in wastewater. In this study, we employed electrospinning to encapsulate MIL-101(Fe) into polyacrylonitrile/polyvinylpyrrolidone (PAN/PVP) nanofibers. Afterward, PVP was removed to generate pores, resulting in the formation of porous PAN-MIL-101(Fe) nanofiber composite membranes (PPAN-M−NFMs) with excellent water stability. The mesoporous structure of the PPAN-M−NFMs exposes more active sites of MIL-101(Fe), enhancing its affinity for phosphate ions. As a result, the membranes exhibited excellent removal performance, reducing 5 mg·L -1 of phosphate to meet the WHO discharge standards within 60 min. Moreover, they demonstrated highly selective adsorption toward phosphate with separation factors exceeding 155 relative to interfering ions. Moreover, the stability of MIL-101(Fe) in the composite membranes was largely enhanced with almost no leaching of iron ions or the ligand because of the improved water resistance provided by the penetration of the PAN chains. The adsorption performance remained stable across eight cycles, with the phosphate recovery of 92.3 % after seven cycles. The recovered phosphate was precipitated with calcium salt to obtain calcium superphosphate, which could be utilized as a phosphate fertilizer. Phosphate adsorption by the PPAN-M−NFMs was attributed primarily to electrostatic attraction and ligand exchange between MIL-101(Fe) and phosphate ions. This study presents a promising approach for designing highly stable MOFs-based adsorbents for the selective removal and recovery of phosphate from wastewater.

关键词： MIL-101(Fe) Nanofiber composite membranes Phosphate removal Phosphate recovery

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Sio2@Dsio2@Tio2 Core-Shell Stationary Phase with Uniform and Tunable Tio2 Thickness for Hplc Separation

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SSRN 2022年

作者： Wang, Dian Wan, Xiang Wang, Jiafei Mangelings, Debby Sun, Yuanshe Li, Tong Xu, Qin Xie, Fazhi Li, Weihua Qu, Qishu Key Laboratory of Functional Molecule Design and Interface Process Anhui Province Engineering Laboratory of Advanced Building Materials School of Materials Science and Chemical Engineering Anhui Jianzhu University Hefei230601 China Department of Analytical Chemistry Applied Chemometrics and Molecular Modelling Vrije Universiteit Brussel Laarbeeklaan Brussels103-B-1090 Belgium Dalian Elite Analytical Instruments Co. Ltd. Dalian116023 China College of Chemistry and Chemical Engineering Yangzhou University Yangzhou225002 China Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse School of Environment and Energy Engineering Anhui Jianzhu University Hefei230601 China

In this work, SiO2@dSiO2 core-shell spheres with radial pore structure are used as the support and tetrabutyl orthotitanate (TBOT) is used as the Ti source to coat TiO2 into the pores of the SiO2@dSiO2 shell. Then, by simply prolonging the reaction time, a TiO2 layer with uniform and controllable thickness is obtained on the surface of SiO2@dSiO2 by Ostwald ripening. The thickness of the TiO2 layer can be achieved by controlling the reaction time or controlling the amount of TBOT. When the amount of TBOT is 0.5 mL (0.06 mol L-1), the thickness of the TiO2 layer can be tunable from 15 to about 44 nm by changing the reaction time. When the amount of TBOT is 0.7 mL (0.08 mol L-1), the thickness of the TiO2 layer can be tunable from 21 to about 71 nm by changing the reaction time. C18-derived core-shell spheres with TiO2 layer thicknesses of 40 nm (C18-S@S@TiO2-0.5-60) and 70 nm (C18-S@S@TiO2-0.7-30) were prepared under the conditions of 0.5 mL TBOT for 60 min reaction time and 0.7 mL TBOT for 0.5 h reaction time, respectively. They were used as packings to evaluate the effect of TiO2 layer thickness on chromatographic separation performance. The separation performance of C18-S@S@TiO2-0.5-60 is better than that of C18-S@S@TiO2-0.7-30. The separation efficiency of C18-S@S@TiO2-0.5-60 to fluorene is 115112 plates m-1, and that of C18-S@S@TiO2-0.7-30 is 83189 plates m-1. The two TiO2-modified core-shell packings have good peak symmetry for basic samples, and the asymmetry factors are both less than 1.11. However, the column efficiency of C18-S@S@TiO2-0.5-60 is higher than that of C18-S@S@TiO2-0.7-30. The separation efficiency of C18-S@S@TiO2-0.5-60 for N, N-dimethylaniline is 46714 plates m-1, while that of C18-S@S@TiO2-0.7-30 is only 34685 plates m-1. © 2022, The Authors. All rights reserved.

关键词： Titanium dioxide

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Heavy metals removal from stormwater runoff by bioretention cells: Recent advances and future prospects

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Journal of Water Process Engineering 2025年 75卷

作者： keying Liu Xinyu Li Pucheng Lei Hong Wang Shijie Yuan Lei Li Xiaohu Dai State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University 1239 Siping Road Shanghai 200092 China China Machinery International Engineering Design & Research Institute Co. Ltd Changsha Hunan 410021 China School of Civil and Environmental Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore

Bioretention cells (BRCs), as a representative low-impact development (LID) technology, play a vital role in improving urban stormwater quality and regulating runoff volume. In recent years, growing attention has been paid to the mechanisms governing the removal and transformation of heavy metals (HMs) in stormwater within BRC systems. This review provided a comprehensive analysis of the structural components and functional roles of filter media, plants, and microorganisms in BRCs, with a particular focus on their mechanism for HMs removal. HMs were primarily removed through filter media–dominated processes, including surface adsorption and physical filtration, followed by subsequent uptake by plants and transformation by microbial communities. key factors influencing HMs removal efficiency, including HMs speciation and concentration, environmental conditions, and pollutant interactions, were summarized. These factors modulate the migration and transformation of HMs and ultimately impact BRCs operational performance. Finally, this review outlined future perspectives for enhancing BRC efficacy, including optimizing media composition, selecting hyperaccumulator species, engineering functional microbial communities, fostering synergistic interactions, and integrating monitoring and modeling tools. These strategies aim to advance BRC design and promote the effective and sustainable removal of heavy metals from urban stormwater runoff.

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