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Springs Emerging along the Elevation Gradient Indicate Intensive Groundwater-Surface Water Exchange in an Alpine Headwater Catchment, Northwestern China

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Journal of Earth Science 2023年第1期34卷 181-193页

作者： Yalu Hu Ziyong Sun Rui Ma School of Environmental Studies China University of GeosciencesWuhan430078China Laboratory of Basin Hydrology and Wetland Eco-Restoration China University of GeosciencesWuhan430078China State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution Ministry of Ecology and EnvironmentWuhan430078China Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science China University of GeosciencesWuhan430078China

Groundwater plays an important role in sustaining the streamflow in cold alpine area, but is poorly understood due to a lack of direct access. About 98 groups of springs are observed at the upper reaches of Heihe River Basin, which provide an opportunity to explore the main aquifers. Springs are clustered in three groups according to locations:(1) springs on the moraine and talus deposits;(2) springs at the end of alluvial plain in lower topography;(3) springs along the river bank. The hydrometric, geochemical and isotopic data of springs in a representative catchment were integrated and used to elucidate the groundwater flow paths. Results indicate the Quaternary porous aquifers in the alpine catchment have a profound influence on the regional groundwater flow paths and the groundwater and surface water(GW-SW) interactions. The aquifer consisting of alluvial-pluvial deposits has a great capacity of groundwater storage and plays a vital role in regulating discharge by attenuating the seasonal variation and maintaining the main stream in cold seasons. This is different from the fast recharge and discharge mode of the moraine and talus deposits. Our work highlights the importance of loose deposits in controlling the GW-SW interactions in the cold alpine area.

关键词： springs alpine catchments groundwater groundwater-surface water interactions alluvial plain

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Enhancing the Efficiency of Enterprise Shutdowns for environmental Protection:An Agent-Based Modeling Approach with High Spatial–Temporal Resolution Data

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Engineering 2024年第11期42卷 295-307页

作者： Qi Zhou Shen Qu Miaomiao Liu Jianxun Yang Jia Zhou Yunlei She Zhouyi Liu Jun Bi School of Management and Economics Beijing Institute of TechnologyBeijing 100081China Center for Energy and Environmental Policy Research Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China The Center of Enterprise Green Governance Chinese Academy of Environmental PlanningBeijing 100012China State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation Chinese Academy of Environmental PlanningBeijing 100012China

Top-down environmental policies aim to mitigate environmental risks but inevitably lead to economic losses due to the market entry or exit of *** study developed a universal dynamic agent-based supply chain model to achieve tradeoffs between environmental risk reduction and economic *** model was used to conduct high-resolution daily simulations of the dynamic shifts in enterprise operations and their cascading effects on supply chain *** includes production,con-sumption,and transportation agents,attributing economic features to supply chain components and cap-turing their *** also accounts for adaptive responses to daily external shocks and replicates realistic firm *** coupling high spatial-temporal resolution firm-level data from 18916 chemical enterprises,this study investigates the economic and environmental impacts of an environmen-tal policy resulting in the closure of 1800 chemical enterprises over three *** results revealed a significant economic loss of 25.8 billion USD,ranging from 23.8 billion to 31.8 billion ***,over 80%of this loss was attributed to supply chain *** analyses indicated that imple-menting a staggered shutdown strategy prevented 18.8%of supply chain losses,highlighting the impor-tance of a gradual policy implementation to prevent abrupt supply chain ***,the study highlights the effectiveness of a multi-objective policy design in reducing economic losses(about 29%)and environmental risks(about 40%),substantially enhancing the efficiency of the environmental *** high-resolution simulations provide valuable insights for policy designers to formulate strategies with staggered implementation and multiple objectives to mitigate supply chain losses and environmental risks and ensure a sustainable future.

关键词： Agent-based model Supply chain network Economic sustainability environmental policy

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Titanium Dioxide Enhanced Di-Butyl Phthalate of Developmental Neurotoxicity in Zebrafish Larvae

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SSRN 2023年

作者： Wang, Yingjia Chen, Haiyue Liang, Hongwu Inner Mongolia Key Laboratory of Environmental Pollution Control & Waste Resource Reuse School of Ecology and Environment Inner Mongolia University Hohhot010021 China

Butyl phthalate (DBP) is a plasticizer widely used with a high detection rate in water. Titanium dioxide nanoparticles (n-TiO2) may enhance the harmfulness of organic contaminants by increasing their bioavailability in aquatic environments. Despite their co-occurrence in water systems, DBP and n-TiO2 have no known joint effects on aquatic life. This study investigated the combined effects of n-TiO2 and DBP on zebrafish larvae developmental neurotoxicity. Our results indicated that exposure combined to DBP and n-TiO2 increased deformities in zebrafish embryos and significantly reduced active larval duration after combined exposure. With DBP and n-TiO2, antioxidation genes are significantly inhibited, oxidative damage is aggravated, neurodevelopment-related genes are profoundly affected, glutamate excitatory toxicity is induced, and nerve damage is more severe in larva. In addition, the puma-p53-bcl2/bax-apaf-1-caspase signaling pathway was activated by high concentrations of DBP combined with n-TiO2, leading to cell apoptosis in zebrafish larvae. The metabolomics results showed that co-exposure, amino acid metabolism disorder will be aggravated, lipid metabolism is disrupted, and nerve damage results in zebrafish larvae. In general, our work showed that n-TiO2 aggravated developmental neurotoxicity of DBP in zebrafish larvae. It is thus imperative to consider the risks that coexisting phthalate esters and nanomaterials pose to aquatic environments. © 2023, The Authors. All rights reserved.

关键词： Titanium dioxide

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Dual Role of Trace Bioavailable Co-Substrate in the Intimately Coupled Photocatalysis and Biodegradation (Icpb) System: Enhancing Refractory Organics Mineralization and Nitrate Removal

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SSRN 2025年

作者： Hu, Feng Zhang, Wencan Chen, Peipei Yuan, Zhanzhan Ye, Jianfeng Xu, Zuxin State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Ministry of Education Key Laboratory of Yangtze River Water Environment Tongji University Shanghai200092 China

Nitrate poses a serious threat to water quality and human health through eutrophication and methemoglobinemia. Conventional biological denitrification is limited in complex wastewater matrices due to the inhibitory effects and low bioavailability of refractory organic pollutants. The Intimately Coupled Photocatalysis and Biodegradation (ICPB) system transforms these recalcitrant compounds into bioavailable electron donors, enabling the simultaneous removal of nitrate and refractory organics. However, when refractory organics serve as the sole carbon source, an imbalance in the carbon-to-nitrogen ratio can lead to pollutant buildup. This study shows that adding a small dose of glucose (50 mg/L COD) to the ICPB system enhances performance by increasing organic mineralization from 53% to 81% and total nitrate and nitrite removal from 40% to 93%. Glucose supplementation improves microbial activity and community composition, optimizing intermediate metabolism and preventing toxic byproduct accumulation without altering pollutant transformation pathways. Metagenomic analysis further indicates that upregulation of the riboflavin biosynthesis pathway enhances electron transfer, thereby boosting system efficiency. Overall, this strategy offers a simple yet effective means to optimize the synergistic removal of refractory organics and nitrate in wastewater treatment. © 2025, The Authors. All rights reserved.

关键词： Glucose

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Sulfation Strategy for Ceo2 in Chlorobenzene Catalytic Combustion: Sulfate Species and Anti-Chloride Poisoning Mechanism

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SSRN 2024年

作者： Zhang, Lei Fang, Siyong Zhou, Linsen Yu, Fang Xiong, Shiqi Huang, Yangyang Zou, Weixin Dong, Lin Key Laboratory of Water Environment Evolution and Pollution Control in the Three Gorges Reservoir School of Environmental and Chemical Engineering Chongqing Three Gorges University Chongqing404000 China Institute of Materials China Academy of Engineering Physics Sichuan Mianyang621908 China State Key Laboratory of Pollution Control and Resource Reuse School of Environment Jiangsu Key Laboratory of Vehicle Emissions Control Nanjing University Nanjing210023 China

Chloride (Cl) poisoning is a challenge for the practical application of CeO2-based catalysts in the catalytic combustion of chlorinated volatile organic compounds. In this work, the CeO2 catalysts through the sulfation strategy exhibit improved resistance to Cl poisoning in the chlorobenzene (CB) catalytic combustion. Comprehensive characterizations and theoretical calculations reveal the anti-chloride poisoning mechanism and the synergistic effects of the naked CeO2 and surface sulfate are the key. The sulfation processes generate the surface and bulk-like sulfates over CeO2, and the different influences of surface and bulk-like sulfate on the catalytic activity and resistance to Cl poisoning are identified, i.e., the surface sulfate effectively prevents Cl poisoning on the naked CeO2, while the bulk-like sulfate severely inhibits the redox and O2 activation ability, leading to the decreased catalytic activity of sulfated CeO2. The work provides a simple and effective strategy for the resistance to Cl poisoning on CeO2-based catalysts. © 2024, The Authors. All rights reserved.

关键词： Cerium oxide

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ZnWO_(4)-ZnIn_(2)S_(4) S-scheme heterojunction for enhanced photocatalytic H_(2) evolution

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Journal of Materials Science & Technology 2022年第27期122卷 231-242页

作者： Meng Dai Zuoli He Peng Zhang Xin Li Shuguang Wang Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and EngineeringShandong UniversityQingdao266237China Suzhou Research Institute Shandong UniversitySuzhou 215123China State Center for International Cooperation on Designer Low-Carbon and Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Key Laboratory of Energy Plants Resource and Utilization Ministry of Agriculture and Rural AffairsSouth China Agricultural UniversityInstitute of Biomass EngineeringGuangzhou 510642China

The recombination of photogenerated electrons and holes is a crucial factor limiting photocatalytic H_(2)*** S-scheme ZnWO_(4)-ZnIn_(2)S_(4)heterojunction with 2D coupling interfaces was successfully synthesized using a simple solvothermal *** effective S-scheme interfacial charge migration route at the S-scheme heterogeneous interface was determined by energy band structure analyses(such as UPS,Mott-Schottky and XPS plots),which facilitates the separation of photoexcited *** is worth noting that the optimal ZnWO_(4)-ZnIn_(2)S_(4)composite has an H_(2)evolution activity of 4925.3μmol g^(-1)h^(-1)with favourable photostability and ***,the ZnWO_(4)-Zn In_(2)S_(4)heterojunction exhibits the maximum optical response value(2.8 m A cm-2)in the initial stage,effectively promoting the separation and migration of photogenerated *** establishment of the built-in electric field direction at the interface can effectively promote the space charge separation between the ZnWO_(4)and ZnIn_(2)S_(4)nanosheets,which is favorable to the photocatalytic H_(2)*** work provides valuable guidance for designing S-scheme heterojunction photocatalysts composed of two n-type semiconductors for energy and environmental *** recombination of photogenerated electrons and holes is a crucial factor limiting photocatalytic H_(2)*** S-scheme ZnWO_(4)-ZnIn_(2)S_(4)heterojunction with 2D coupling interfaces was successfully synthesized using a simple solvothermal *** effective S-scheme interfacial charge migration route at the S-scheme heterogeneous interface was determined by energy band structure analyses(such as UPS,Mott-Schottky and XPS plots),which facilitates the separation of photoexcited *** is worth noting that the optimal ZnWO_(4)-ZnIn_(2)S_(4)composite has an H_(2)evolution activity of 4925.3μmol g^(-1)h^(-1)with favourable photostability and ***,the ZnWO_(4)-ZnIn_(2)S_(4)heterojunc

关键词： Photocatalysts H_(2)evolution S-scheme heterojunction Internal electric field ZnWO_(4)-ZnIn_(2)S_(4)nanosheets

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Palladium Nanoparticles Facilitated Fast Debromination and Complete Mineralization of Tetrabromobisphenol S (Tbbps) Through Coupling Catalytic Hydrodehalogenation with Advanced Oxidation Processes

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SSRN 2024年

作者： Zheng, Xiong Ma, Yuanyuan Wu, Yang Chen, Lang Long, Min Chen, Yinguang State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and Engineering Tongji University Shanghai200092 China Key Laboratory of Yangtze River Water Environment School of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Brominated organic pollutants (BOPs), classified as persistent organic pollutants (POPs), have raised environmental concerns. This study coupled in situ catalytic hydrodehalogenation (HDH) with advanced oxidation process (AOP) facilitated by palladium nanoparticles (PdNPs), for the removal and mineralization of TBBPS. The heterogeneous catalytic HDH over PdNPs achieved a TBBPS conversion to bisphenol S (BPS) with a debromination efficiency of nearly 99% in 1 hour under near-neutral conditions. Additionally, the in situ generated Br- synergistically promoted the mineralization removal of BPS during the AOP (over 99% removal within 20 min). 1O2 produced by activated peroxymonosulfate (PMS) was the most effective active substance for degrading BPS. Combining experimental data and theoretical calculation analysis, a plausible degradation pathway for TBBPS was proposed. ECOSAR prediction indicated that the coupling method substantially diminishes the biotoxicity of the substrates through debromination and mineralization. These findings substantiate a promising coupling method for the elimination of halogenated organic compounds. © 2024, The Authors. All rights reserved.

关键词： Organic pollutants

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Mechanistic Exploration of COVID-19 Antiviral Drug Ritonavir on Anaerobic Digestion Through Experimental Validation Coupled with Metagenomics Analysis

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SSRN 2024年

作者： Wang, Ruming Wang, Zhuoqin Yuan, Haiping Li, Chunxing Zhu, Nanwen School of Environmental Science and Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai200240 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

The aggregation of antiviral drugs (ATVs) in waste activated sludge (WAS) and their migration and transformation during WAS treatment pose considerable environmental exposure, so it is crucial to understand the behavior of these agents during WAS treatment. This study investigated the effects of ritonavir (RIT), an ATV used to treat human immunodeficiency virus infection and coronavirus disease 2019, on anaerobic digestion (AD) of WAS to reveal the mechanisms by which it interferes with anaerobic flora. The dosage influence results showed that methane production in AD of WAS decreased by 46.56% when RIT concentration was increased to 1000 μg/kg total solids (TS). The AD staging test revealed that RIT mainly stimulated microbial synthesis of the extracellular polymeric substance (EPS), limiting organic matter solubilization. At 500 μg/kg TS, RIT decreased CHO and CHON levels in dissolved organic matter by 23.12% and 56.68%, respectively, significantly reducing substrate availability to microorganisms. Metagenomic analysis of microbial functional gene sets revealed that RIT had greater inhibitory effects on protein and amino acid metabolism than on carbohydrate metabolism. Under RIT stress, methanogens switched from hydrogenotrophic and acetotrophic methanogenesis to methylotrophic and acetotrophic methanogenesis. © 2024, The Authors. All rights reserved.

关键词： Anaerobic digestion

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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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Fe-MOFs nanosheets for photo-Fenton degradation of carbamazepine

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Chemosphere 2024年 364卷 143240页

作者： Sun, Siyu Hu, Youyou Li, Zhengkui State Key Laboratory of Pollution Control and Resource Reuse Nanjing University Nanjing210023 China School of the Environment Nanjing University Nanjing210023 China Shanghai Fisheries Research Institute Shanghai Fisheries Technical Extension Station Shanghai200433 China

Iron(II)-based metal organic framework (Fe(II)-MOF) nanosheets have emerged as promising candidates for photo-Fenton catalysis. However, efficiently synthesizing Fe(II)-MOF nanosheets remains a significant challenge. Here, a bottom-up synthesis strategy is proposed to prepare two-dimensional Fe-MOF nanosheets (TFMN) with micrometer lateral dimensions and nanometer thickness, featuring Fe(II) as the metal nodes. The application of TFMN in the photo-Fenton degradation of carbamazepine (CBZ) demonstrates remarkable CBZ degradation performance and excellent efficiency across a wide range of pH values. The electron density and density of states are further calculated by density functional theory. Mechanism analysis identifies h+, •OH and •O2− as the predominant active species contributing to the catalytic oxidation process in the Vis/TFMN/H2O2 system. © 2024 Elsevier Ltd

关键词： Metal-Organic Frameworks

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