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Mechanism Directed Toxicity Testing and Instrumental Analysis Make key Toxicant Identification More Targeted and Efficient: A Case in the Yangtze River

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Environmental science & technology 2025年第24期59卷 2025 Jun 10页

作者： Shaoqing Zhang Kefan Xu Liben Chou Qian Cui Guanjiu Hu Beibei Zhang Keng Tu Wenrui Luo Liyuan Ma Jing Guo Haoyue Tan Si Wei Xiaowei Zhang Hongxia Yu Wei Shi State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210023 China. Nanjing Yangtze River Delta Green Development Institute Nanjing 210093 China. Jiangsu Environmental Monitoring Center Nanjing 210019 China. Jiangsu Province Ecology and Environment Protection Key Laboratory of Chemical Safety and Health Risk Nanjing 210023 China.

Current toxicant identification mainly relies on subjective and blind toxicity testing and compound screening. This could overlook the sensitive toxicity end point and key toxicants due to the random experiment selection, or it might incur high expenditures due to toxicity testing of multiple end points. In this context, a key toxicity-mechanism-based new effect-directed analysis strategy was established. The strategy is based on the key toxicity mechanisms from the transcriptome to determine subsequent toxicity tests and chemical analyses to achieve the efficient, rational, and focused identification of key toxicants in mixtures. Then, this strategy was applied to the Yangtze River samples. By transcriptome testing, the nerve growth factor and neurotrophin binding pathways showed the highest detection rate, indicating that the key toxicity mechanism is neurotoxicity. Zebrafish behavior tests were further chosen for neurotoxicity effect evaluation, and they showed significant inhibition in 64% of the samples. On the other hand, 38 and 94 neurotoxicants in samples were identified via targeted and pseudotargeted screening from 3363 potential toxicants. Further combining mechanism-based biological testing and chemical analysis for toxicant verification, this study ultimately identified seven key toxicants, such as atrazine, hexazinone, and niclosamide. The mechanism-directed EDA will open a new horizon for accurate identification and prioritization of key toxicants in the environment.

关键词： key toxicants pseudotargeted analysis toxicity mechanisms transcriptome zebrafish behaviors

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Long-chain nanocellulose-based aerogels for water treatment: strategies from fabrication towards modification

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Chemical Engineering Journal 2025年 516卷

作者： Zhou, Jie Luo, Zhengkun Kou, Yingwei Zhou, Xiao Li, Xiaodong Zhang, Wei-xian Deng, Zilong State Key Laboratory for Pollution Control and Resource Reuse College of Environmental Science and Engineering Shanghai Institute of Pollution Control and Ecological Security Tongji University 1239 Siping Road Shanghai200092 China College of Civil Engineering Tongji University 1239 Siping Road Shanghai200092 China Co. Ltd Shanghai Ship and Shipping Research Institute 600 Minsheng Road Shanghai200135 China

Long-chain nanocellulose (LNC)-based aerogels, synthesized from a family consist of cellulose nanofibers (CNF) and bacterial nanocellulose (BNC), have emerged as a next-generation solution for water treatment. These aerogels combine the structural superiority of conventional aerogels with the remarkable physicochemical properties of LNC, including high porosity, excellent mechanical strength and tunable surface chemistry. This integration enhances their removal efficiency and recyclability, making them highly applicable for water treatment. This review systematically explores the fabrication strategies, intrinsic properties, and characterization techniques of LNC-based aerogels, emphasizing their versatility in water purification applications. Special attention is paid to address the gaps that the current literature 1) lacks a comprehensive evaluation of surface modification and composite functionalization and 2) provides limited mechanistic insights into pollutants removal by LNC aerogels. Future research should focus on developing machine learning-guided nano-structural engineering for scalable synthesis of sustainable aerogels, synergistically integrated with life cycle assessment. © 2025

关键词： Nanocellulose

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Merging eDNA and ecological network analysis to assess aquatic ecosystem status

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Ecological Indicators 2025年 176卷

作者： Wang, Xusheng Wang, Xiaonan Ai, Shunhao Wu, Fan Xi, Jiayin Li, Ji Liu, Zhengtao State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China The College of Life Science Nanchang University Nanchang330047 China College of Water Sciences Beijing Normal University Beijing100875 China

Aquatic ecosystems are essential for human environments, however, are highly sensitive to external disturbances, making accurate assessment crucial. This study evaluates the ecological composition and integrity of the Yangtze River Basin using environmental DNA (eDNA) sequencing and network analysis. A comprehensive index of biological integrity (CIBI) was developed based on 63 key metrics selected from 477 candidates, revealing notable seasonal variation in ecological status. By focusing on diversity indices and network parameters, the assessment model avoids the complexity of traditional indicator selection and biological analysis, instead capturing core ecosystem characteristics and reliably predicting the ecological condition of the basin. A structural equation model was used to further refine the model by reducing the number of evaluation indicators, demonstrating that ecological status is affected by physical and nutrient factors, with biodiversity serving as a mediating variable. Overall, ecological status was highest at the river's source, declined downstream, and exhibited pronounced seasonal variation. This study presents a comprehensive framework for aquatic ecosystem assessment, integrating eDNA and network metrics to enhance understanding and prediction of ecological dynamics in the Yangtze River Basin. © 2025 The Author(s)

关键词： Aquatic ecosystems

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Benchmarking Wastewater Discharge Standards, Treatment Technologies and Implications in the Southern Africa Development Community Region, Africa

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SSRN 2024年

作者： Ndiweni, Kwanele Wang, Hongtao UNEP Tongji Institute of Environment for Sustainable Development College of Science and Engineering Tongji University Shanghai200092 China Key Laboratory of Yangtze River Water Environment Ministry of Education State key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Tongji University Shanghai200092 China

Wastewater discharge standards have continual evolved in both spatial and limit stringency in the recent decades, due to realization of linkages between environmental degradation to effluent disposals. We analysed wastewater discharge standards and treatment technologies within the Southern African Development Community (SADC), inland member states. We found that all inland SADC countries have legislated effluent discharge standards for point sources, with a total of 127 parameters across the eleven countries. Analysis revealed high variation, 33.89% standard deviation in the general parameter coverage and on comparative index ranking, only 36.36% occupy third and fourth quartiles within SADC region countries indicating inherent, weak threshold limits and fragmented effluent discharge approaches. In order to achieve discharge regulatory limits and reach Sustainable Development Goals 6 (SDG 6) targets, appropriate technologies for wastewater treatment have to be utilized. Here, we found countries wastewater technologies consist of waste stabilization ponds at approximately 45 – 83.3% and convectional activated sludge plants being remainder. Past performance assessments indicated these wastewater technologies in use by the SADC countries are failing to reach agreed discharge regulatory limits. Hence, our analysis concludes that existing weak operational nexus for wastewater discharge standards and treatment technologies for the region exposes the region to intra-region water pollution transmission. These findings are useful for policy implementors as they bring perspective of need to have regional benchmarks and guidelines for environmental protection strategies. © 2024, The Authors. All rights reserved.

关键词： Wastewater treatment

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Selective Recovery of Rare Earth Elements from Mine Wastewater Using the Magnetic Zeolite Prepared by Rare Earth Tailings

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SSRN 2025年

作者： Zhang, Jianhui Cheng, Jianchen Xu, Guizhou Hou, Xuechao Yu, Zhifei Liu, Wei Zhang, Yalan Chen, Jianxin Yang, Jiahao Wu, Mengting Yang, Wanqing Li, Simin Zhang, Meiyan Chen, Lijun Li, Zhiwen Zhang, Jiaxia Wu, Xinying Wang, Xinyi Xiao, Jinmei Xie, Xianchuan Key Laboratory of Poyang Lake Environment and Resource Utilization Engineering Research Center of Watershed Carbon Neutralization Ministry of Education School of Resource and Environment Nanchang University Nanchang330031 China China Electric Construction Group Jiangxi Electric Power Design Institute Co China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

The effective enrichment and recovery of rare earth elements (REEs) from wastewater holds significant practical value for both the sustainable utilization of REEs and the restoration of ecological environments. In this study, magnetic zeolite was successfully synthesized by using rare earth tailings (RET) as the raw material, with the addition of Fe3O4 to introduce a magnetic phase. Th magnetic zeolite exhibits high crystallinity, excellent thermal stability, substantial specific surface area of 483.8 m2/g, and rapid adsorption kinetics. The maximum adsorption capacities for La3+ and Ce3+ in aqueous solutions were determined to be 123.2 mg/g and 99.9 mg/g, respectively, with adsorption efficiencies remaining above 70% for La3+ and 80% for Ce3+ after six adsorption *** zeolite was effectively employed to recover REEs from real acid mine wastewater, with La3+ and Ce3+ recoveries exceeding 90%, and distribution coefficients (Kd) of 2681.7 mL/g and 5321.8 mL/g, respectively, demonstrating notable adsorption selectivity. Moreover, the magnetic zeolite can be easily separated using an external magnetic field, addressing the recovery challenges typically associated with conventional zeolite. Overall, through this technology, both the loss of REEs from wastewater and the environmental pollution caused by renewable energy technologies are addressed, thus presenting an effective strategy for simultaneous remediation. © 2025, The Authors. All rights reserved.

关键词： Tailings

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Characteristics of rural domestic sewage discharge and their driving mechanisms: evidence from the Northern Region, China

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Frontiers of Environmental Science & Engineering 2024年第7期18卷 47-58页

作者： Jianguo Liu Ziyu Zhou Pengyu Li Zixuan Wang Ying Yan Xuezheng Yu Wenkai Li Tianlong Zheng Yingnan Cao Wenjun Wu Wenqian Cai Zhining Shi Junxin Liu Key Laboratory of Environmental Pollution Control and Remediation at Universities of Inner Mongolia Autonomous Region College of Resources and Environmental EngineeringInner Mongolia University of TechnologyHohhot 010051China State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China SCEGC No.12 Construction Engineering Group Co. Ltd.Ankang 725000China State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation Chinese Academy of Environmental PlanningBeijing 100041China Technical Centre for Soil Agriculture and Rural Ecology and EnvironmentMinistry of Ecology and EnvironmentBeijing 100012China Sustainable Infrastructure and Resource Management(SIRM) UniSA STEMUniversity of South AustraliaSouth AustraliaMawson LakesSA 5095Australia

The traits of rural domestic sewage emission are unclear,negatively affecting rural domestic sewage treatment and sewage *** study used data from the Second National pollution Source Census Bulletin to establish a data *** spatial distribution characteristics and main factors influencing rural sewage discharge in the Northern Region were studied using spatial autocorrelation analysis and structural *** findings demonstrated that(l)a significant Spearman correlation between drainage water volume(DwV),chemical oxygen demand(COD),ammonia nitrogen(NH_(3)-N),total nitrogen(TN),and total phosphorus(TP)and that the correlation coefficients between DWV and COD,NH,-N,TNand TP were 0.87**,1.0**,0.99**,0.99**,respectively;(2)rural sewage discharge showed spatial autocorrelation,and rural domestic sewage discharge in the districts and counties with an administration was significantly higher than in the surrounding areas;and(3)social development was the main driver rural domestic sewage changes(path coefficient was 0.407**),and the main factors influencing rural domestic sewage discharge were the urbanization rate,years of education,and population age *** study obtained the spatial variation law and clarified the main influencing factors of rural domestic sewage to provide data support and a theoretical basis for subsequent rural sewage collection and *** of the Inner Mongolia Autonomous Region in northern China as a typical case,provides a theoretical foundation for scientific decision-making on rural domestic sewage treatment at the national and regional levels and offers new perspectives for managing pollutants.

关键词： Rural domestic sewage Emission characteristics Spatial autocorrelation analysis Influencing factors

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Electric Double Layer Capacitive Adsorption and Faradaic Pseudo-Capacitance Behavior of Znfe-Pani/Cnt Electrode for Phosphate Removal in Capacitive Deionization

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SSRN 2023年

作者： Zhang, Hao Wang, Qiaoying Li, Lexue Huang, Rong Gu, Hongbo Wu, Zhichao Wang, Zhiwei 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 Shanghai Key Lab of Chemical Assessment and Sustainability School of Chemical Science and Engineering Tongji University Shanghai200092 China

Capacitive deionization technology possesses puissant competitiveness in the field of water treatment due to its low cost and high efficiency. In this study, polyaniline (PANI) doped and carboxyl intercalated metal hydroxide composite (ZnFe-PANI/CNT) was developed by a simple co-precipitation method, and used as anode electrode for phosphate removal in sewage. The results show that ZnFe-PANI/CNT electrode can efficiently remove phosphate at concentration of 2–10 mg/L at a wide range of pH (3–10) by electric double layer capacitive adsorption and pseudocapacitive adsorption. The concentration of phosphate in the effluent was as low as 0.095 mg/L, and the coexisting anions (Cl-, NO3-, SO42- and HCO3-) hardly inhibited the phosphate adsorption by ZnFe-PANI/CNT composite electrode. In addition, under the optimal phosphate adsorption conditions (pH=7 and applied voltage of 1.2 V), the energy consumption of CDI system was calculated as low as 0.00274 kWh/g P and 0.017 kWh/m3 water, realizing the expectation of low cost and high efficiency operation. © 2023, The Authors. All rights reserved.

关键词： Costs

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Uptake of graphene enhanced the photophosphorylation performed by chloroplasts in rice plants

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Nano Research 2020年第12期13卷 3198-3205页

作者： Kun Lu Danlei Shen Shipeng Dong Chunying Chen Sijie Lin Shan Lu Baoshan Xing Liang Mao State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing210093China CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety and CAS Center for Excellence in Nanoscience National Center for Nanoscience and TechnologyBeijing100190China College Environmental Science&Engineering State Key Laboratory of Pollution Control and Resource ReuseTongji UniversityShanghai200092China State Key Laboratory of Pharmaceutical Biotechnology School of Life SciencesNanjing UniversityNanjing210023China Stockbridge School of Agriculture University of MassachusettsAmherstMA01003USA

New and enhanced functions were potentially imparted to the plant organelles after interaction with *** this study,we found that∼44%and∼29%of the accumulated graphene in the rice leaves passively transported to the chloroplasts and thylakoid,respectively,significantly enhanced the fluorescence intensity of chloroplasts,and promoted about 2.4 times higher adenosine triphosphate production than that of *** enhancement of graphene on the photophosphorylation was ascribed to two reasons:One is that graphene facilitates the electron transfer process of photosystem II in thylakoid,and the other is that graphene protects the photosystem II against photo-bleaching by acting as a scavenger of reactive oxygen ***,our work here confirmed that graphene translocating in the thylakoid promoted the photosynthetic activity of chloroplast in vivo and in vitro,providing new opportunities for designing biomimetic materials to enhance the solar energy conversion systems,especially for repairing or increasing the photosynthesis activity of the plants grown under stress environment.

关键词： graphene photophosphorylation enhancement photosystem II ROS scavenging protection

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Thermoresponsive hydrogel-regulated interfacial polymerization for nanofiltration membranes with mono-/divalent anions separation performance

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Journal of Membrane Science 2025年 733卷

作者： Liu, Xin Wang, Dong Shen, Yun Wang, Ziming Wang, Zhining Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao266237 China Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao266100 China

This study pioneered a concentration-engineered interfacial polymerization (IP) strategy using Pluronic F127 (PF-127) to solve the persistent permeability-selectivity trade-off in thin-film composite nanofiltration (TFC NF) membranes. Based on PF-127 concentration-driven phase behavior, we investigated three different IP processes including monolayer surfactant-induced IP (MLIP), micelle-monolayer coexisting IP (MCIP) and thermoresponsive hydrogel regulated IP (GIP). Below its critical micelle concentration (CMC), PF-127 formed an ordered interfacial monolayer, restricting piperazine (PIP) diffusion via hydrogen bonding and steric hindrance, forming ultrathin, smooth PA layers. Above CMC, micelle coexistence disrupted monolayer integrity, enhancing PIP diffusion and producing thicker, rougher membranes. Notably, at concentrations and temperatures exceeding CMC and lower critical solution temperature (LCST), PF-127 formed a hydrogel network that further controls monomer diffusion, enabling freestanding PA layers after low-temperature removal. The GIP membranes with high electronegative surface exhibited an exceptional Na2SO4/NaCl selectivity of 133.79 accompanied with a permeance of 14.80 L m−2 h−1 bar−1. The membrane demonstrated an excellent rejection to heavy metal sulfates (e.g., CuSO4, CdSO4, MnSO4), as well as an outstanding stability. The PF-127 hydrogel assisted GIP strategy paved a new way for NF membrane design, demonstrating significant potential for applications in heavy metal wastewater treatment and industrial wastewater valorization. © 2025 Elsevier B.V.

关键词： Nanofiltration

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Synergistic Mechanism of Modified nZVI and Citrobacter Reshaping Sludge Microbiome Drives Co-Removal of HBCD and Nutrients in Municipal Wastewater

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SSRN 2025年

作者： Li, Tianyu He, Yuzhe Zhang, Weixian Peng, Xingxing School of Environmental Science and Engineering Sun Yat-sen University Guangdong Guangzhou510006 China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Guangzhou510275 China Tongji University College of Environmental Science & Engineering State Key Lab Pollut Control & Resource Reuse Shanghai Shanghai200092 China

Hexabromocyclododecane (HBCD), a persistent and toxic brominated flame retardant, poses severe ecological and health risks due to its bioaccumulation and endocrine-disrupting effects. Effective removal from wastewater is critical to mitigate risks. Coupling functional microbes with modified nanomaterials represents a robust approach for degrading such recalcitrant organohalides. Based on the research foundation of the functional bacterial strain Citrobacter sp. Y3 and a modified nano-zero-valent iron (nZVI) coupled system, we designed and constructed a novel anaerobic continuous stirred-tank reactor (CSTR) system for the treatment of municipal wastewater in this study. HBCD-contaminated wastewater and actual domestic sewage were fed into this CSTR system. During continuous monitoring of HBCD concentration changes over 360 h, we simultaneously tracked the removal efficiencies of nitrogen (N), phosphorus (P), and chemical oxygen demand (COD). The results demonstrated that the HBCD degradation rate reached 100% within 72 h, while the removal of other nutrients met regulatory discharge requirements. The CSTR system significantly enriched diverse functional bacterial taxa harboring multiple functional genes, including organohalide-respiring bacteria (OHRB) (rdhA/B, PecA/B), iron-reducing bacteria (IRB) (cymA, fur), and nitrogen/phosphorus-removing bacteria (hzoB, haoA, norB and pstA/B/C). Dynamic interactions (synergistic cooperation and competition) among microbial communities drove the decomposition and transformation of pollutants. To our knowledge, this study provides the first demonstration of coupling functional bacteria with modified nanomaterials in activated sludge systems. © 2025, The Authors. All rights reserved.

关键词： Health risks

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