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SSRN 2025年

作者： Bai, Hongwei Tan, Wenbing Yuan, Ying Li, Dongyang Kang, Yike Liu, Qiao Cui, Dongyu State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Jiangsu Nanjing210023 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China Beijing100083 China Nanjing University China

Dissolved organic phosphorus (DOP) and dissolved organic nitrogen (DON) have high potential bioavailability, making them key factors in the water eutrophication process. For wastewater treatment plants (WWTPs), one of the challenges in alleviating eutrophication in receiving waters is reducing levels of DOP and DON, which are harder to remove than inorganic phosphate and dissolved inorganic nitrogen. In this study, for the first time we simultaneously investigated the bioavailability and transformation of DOP and DON in a WWTP at the molecular level, via Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) and paired mass distance (PMD)-based network analysis. Results showed that the removal of DOP and DON in the biological treatment contributed 83.3% and 100.3%, respectively, to the total removal in the WWTP. Meanwhile, the double bond equivalence values of DOP and DON increased during the biological treatment but decreased during the advanced treatment, indicating that the biological treatment plays a dominant role in reducing the concentration and bioavailability of DOP and DON. PMD-based network analysis indicated that the variation in the bioavailability of DOP and DON in the biological treatment was primarily associated with the transformation from low unsaturation lipid- and protein-like species to highly unsaturated lignin-like species. Our findings enhance the understanding of the bioavailability and transformation of DOP and DON in WWTPs, which might shed light on more effective strategies for upgrading WWTPs to meet more stringent nutrient discharge limits in the future. © 2025, The Authors. All rights reserved.

关键词： Eutrophication

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Antibiotic resistance genes in aquatic systems: Sources, transmission, and risks

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Aquatic Toxicology 2025年 284卷 107392页

作者： Zhang, Tingting Fan, Linyi Zhang, Ya-Nan State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration School of Environment Northeast Normal University Changchun 130117 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210023 China

The widespread use of antibiotics has significantly contributed to the spread of antibiotic resistance genes (ARGs), which have become a major challenge to global ecological and public health. Antibiotic resistance not only proliferates in clinical settings but also persists in aquatic systems, where its residues and cross-domain spread pose a dual threat to both ecosystems and human health. ARGs spread rapidly within microbial communities through horizontal gene transfer (HGT) and vertical gene transfer (VGT). Aquatic systems are the key transmission medium. This review summarizes recent studies on the Source-Transport-Sink dynamics of ARGs in aquatic environments, along with their environmental and health risk assessments, with a particular focus on the potential ecotoxicity of ARGs transmission. It also examines the distribution characteristics of ARGs across different regions and the ecological risk assessment methods employed, highlighting the limitations of existing models when addressing the complex behaviors of ARGs. By analyzing the potential hazards of ARGs to aquatic ecosystems and public health, this article aims to provide a scientific foundation for future research and the development of public policies. © 2025 Elsevier B.V.

关键词： Antibiotic resistance genes Aquatic systems Risk Toxicity Transmission

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Selective enrichment of gram-staining bacteria by antimicrobial pressure enhances volatile fatty acids production from waste activated sludge

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Chemical Engineering Journal 2025年 514卷

作者： Xia, Xue Huang, Wenxuan Wei, Zhicheng Fang, Fang Su, Lianghu Luo, Jingyang Wu, Yang Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education Hohai University Nanjing210098 China College of Environment Hohai University Nanjing210098 China State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and Engineering Tongji University Shanghai200092 China Nanjing Institute of Environmental Sciences Ministry of Ecology and Environment Nanjing210042 China Shanghai Key Laboratory of Urban Renewal and Spatial Optimization Technology Shanghai200092 China

Anaerobic fermentation of waste activated sludge (WAS) relies on intricate microbial networks, particularly the distribution and metabolic synergy between Gram-negative (GNB) and Gram-positive bacteria (GPB). However, the mechanisms governing their ecological interactions and the potential for optimizing their community structure remain poorly understood. This study reveals that selective antimicrobial pressure can strategically regulate GNB-GPB distribution to enhance volatile fatty acids (VFAs) production. Molecular docking analysis revealed distinct binding mechanisms: vancomycin (VCM) showed no spontaneous binding with extracellular polymeric substances (EPS) (binding energy: 22.5 kJ/mol), whereas metronidazole (MDZ) formed hydrogen bonds through C-OH and N=O groups (−4.5 kJ/mol). These distinct interactions resulted in divergent microbial community structures: VCM stress led to GNB-dominated communities (88–90 %), whereas MDZ reactors maintained balanced GNB-GPB ecosystems. Consequently, MDZ reactors achieved significantly higher VFA yields (1729–2311 mg COD/L) compared to VCM reactors (855–997 mg COD/L). Multi-omics analysis uncovered distinct metabolic roles: GNB dominated extracellular substrate hydrolysis (75.6–84.0 %), while GPB (predominantly Firmicutes) controlled amino acid metabolism (61.3 %). This metabolic division of labors between GNB and GPB creates efficient substrate-to-VFA conversion pathways. Meanwhile, under antimicrobial stress, GNB activated membrane repair pathways (gmr, solR: 7.5–49.3 fold increase), whereas GPB enhanced DNA repair (polC: 3946.9 % increase) and cell division (mtrA, mtrB: 71.5–1122.2 % increase). Both bacteria responded to antimicrobial stress by upregulating efflux systems (mdtA-D: 105.9–388.0 %;smeA/B: 1288.7–4325.7 %), effectively alleviating antibacterial stress. These findings provide new insights into microbial regulation strategies for optimizing WAS valorization through the functional domestication of GNB and GPB a

关键词： Listeria

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Microbial dynamics and CO consumption enhancement via co-digestion with carbohydrate-rich synthetic wastewater

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Science of the Total Environment 2025年 968卷 178887页

作者： Li, Chunxing Bao, Ruihan Sun, Yan Quan, Jiawei Angelidaki, Irini Yuan, Zengwei State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China Lishui Institute of Ecology and Environment Nanjing University Nanjing211200 China Department of Chemical and Biochemical Engineering Technical University of Denmark Kgs. LyngbyDK-2800 Denmark

Due to the toxicity and low mass transfer of CO, its efficient conversion is crucial for syngas biomethanation. In the present study, anaerobic co-digestion of CO and carbohydrate-rich synthetic wastewater was conducted to facilitate the CO conversion performance, followed by microbial analysis with and without methanogenic activity inhibition (namely, digestion and acidification systems). The results indicated that glucose addition in co-digestion system dramatically enhanced CO consumption. The maximum consumption rate (μ-max) of CO increased by about 65 % with adding glucose. However, CO presented partial inhibition on methanogenic activity without declining methane yield. Microbial analysis showed that microbial diversity increased in co-digestion systems. Hydrogenotrophic methanogens from Methanobrevibacter became dominant in all individual and co-digested systems. Methanogenic activity inhibited community proved the bacteria mainly mediated CO conversion, and glucose addition promoted the growth of acetogenic bacteria from Firmicutes, relating to the enhancement in CO consumption. Species from Synergistota worked as the main syntrophic oxidizers, along with Defluviitoga, Syntrophomonas, and Syntrophaceticus, assisting methane production by hydrogenotrophic methanogens. The outcomes in the present study supply an efficient strategy for synergetic treatment of syngas (CO-rich gas) and organic waste/wastewater for energy recovery. © 2025 Elsevier B.V.

关键词： Carbohydrate-rich synthetic wastewater Carbon monoxide Carboxydotroph Co-digestion Microbial analysis Syngas biomethanation

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Combination of suspect and nontarget screening with exposure assessment for per- and polyfluoroalkyl substance prioritization in Chinese municipal wastewater

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Environment International 2025年 198卷 109384页

作者： Mu, Hongxin Chen, Ling Zhou, Rong Gu, Luyao Yu, Yue Tang, Jin Zhang, Houhu Ren, Hongqiang Wu, Bing Bu, Yuanqing Research Center of Solid Waste Pollution and Prevention Nanjing Institute of Environmental Science Ministry of Ecology and Environment Nanjing210042 China State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China School of Environmental Science and Engineering Nanjing University of Information Science and Technology 219 Ningliu Road Nanjing210044 China

Municipal wastewater treatment plants (WWTPs) are significant sources of per- and polyfluoroalkyl substances (PFASs) in aquatic environments, making their identification and priority rank crucial for risk control. Wastewater samples were collected from 148 municipal WWTPs in China to determine the occurrence and risk prioritization of PFASs. A total of 61 PFASs were identified, including 14 legacy and 47 emerging PFASs, using machine learning prediction-enhanced suspect and nontarget screening techniques. PFASs were detected in all wastewater samples, with perfluorocarboxylic acid (PFCA), perfluorosulfonic acid (PFSA), fluoromeric sulfonic acid (FTSA), and perfluoroalkyl sulfonamide-like (PFSM) substances being the predominant classes. The exposure loads of legacy and emerging PFASs to the Chinese population were 71.8 and 52.9 μg·day−1·people−1, respectively, and textile and clothing products might be the primary PFAS exposure pathways. Through a risk prioritization method integrating toxicity and exposure data, ten legacy and five emerging PFASs were flagged as high-priority substances requiring additional attention. As the PFAS risk removal efficiency by conventional biological treatment processes was only 0.7 %, the PFAS risk priority patterns in influent and effluent were similar (r = 0.86, p © 2025 The Author(s)

关键词： Wastewater treatment

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Role of reactive oxygen species (ROS) on biochar enhanced chromium phytoremediation in the soil–plant system: Exploration on detoxification mechanism

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Environment International 2025年 199卷 109471页

作者： Jia, Xiaohui Zhang, Baiyu Han, Yonghe Guan, Jiunian Gao, Hongjie Guo, Ping Key Laboratory of Groundwater Resources and Environment Ministry of Education College of New Energy and Environment Jilin University Changchun130012 China Jilin Provincial Key Laboratory of Water Resources and Environment Jilin University Changchun130012 China Department of Civil Engineering Faculty of Engineering and Applied Science Memorial University St. John’ sNLA1B 3X5 Canada Fujian Key Laboratory of Pollution Control and Resource Reuse College of Environmental and Resource Sciences Fujian Normal University Fujian Fuzhou350117 China School of Environment Northeast Normal University Changchun130117 China Chinese Research Academy of Environmental Science Beijing100012 China

Biochar, as an amendment to enhance phytoremediation of heavy metal contamination, can mediate reactive oxygen species (ROS) generation. However, the role of biochar-mediated ROS (BMR) during soil–plant phytoremediation remains inadequately understood. In this study, a combination of pot experiments, chemical extraction, and partial least squares path modeling (PLS-PM) was employed to investigate BMR dynamics and their influence on chromium (Cr) accumulation and detoxification in plants. Biochar addition promoted Cr removal efficiency and decreased ROS concentrations in soil, notably reaching the largest removal efficiency of 80.60 % and the lowest ROS concentration of 37.53 μmol/kg in BC-3 group at 90d. Decreased ROS concentrations in soil facilitated the plant absorbing water-soluble Cr (VI), adsorbed Cr (VI), and chromate-precipitated Cr (VI) in soil, and enhanced Cr accumulation in metabolically inactive compartments (cell walls and vacuoles). When biochar was added at concentrations of 2 % and 3 % (w/w), ROS concentrations in plant tissues decreased to signaling molecule thresholds. This reduction further stimulated antioxidant enzyme activity, promoted the reduction of Cr (VI) within subcellular organelles, and enhanced Cr cell wall fixation and vacuolar compartmentation, ultimately achieving their synergistic integration with Cr detoxification with accumulation. This study provides an in-depth understanding of BMR-related mechanisms during phytoremediation and valuable insights into strategies for enhancing mitigation of variable valence heavy metals in soils. © 2025 The Author(s)

关键词： Phytoplankton

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

SSRN

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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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Response of abundant and rare microbial taxa to three iron-carbon composite amendments in metal-contaminated agricultural soil

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Journal of Environmental Sciences (China) 2025年 157卷 170-185页

作者： Yang, Ting Li, Jiacan Yuan, Ying Zheng, Xin Liu, Yifei Zhang, Bing Chen, Tan Jin, Jun Zhuang, Linlan College of Life and Environmental Sciences Minzu University of China Beijing 100081 China Technical Centre for Soil Agriculture and Rural Ecology and Environment Ministry of Ecology and Environment Beijing 100012 China Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science & Engineering Shandong University Qingdao266237 China

Traditional studies of microbial succession under iron-carbon composite (Fe-C) amendment application have focused on the entire microbial community, with limited attention to the responses and ecological roles of abundant or rare taxa. Herein, a 90-day microcosm incubation was conducted to investigate the effects of three Fe-C amendments, including Fe3O4-modified biochar (FeC-B), ferrihydrite-natural humic acid (FeC-N), and ferrihydrite-synthetic humic-like acid (FeC-S), on distribution patterns, assembly processes, and ecological functions of both abundant and rare subcommunities. Our results showed that Fe-C amendments significantly affected the α-diversity of rare taxa, particularly under FeC-B treatment, with minimal impact on abundant taxa. Fe-C amendments also reshaped the community structures of both groups. Rare taxa, representing 63.9 % of Operational Taxonomic Unit (OTU) richness but only 1.6 % of total abundance, played a key role in community diversity and were more susceptible to Fe-C amendments. Certain rare taxa transitioned to abundant status, demonstrating their potential as a microbial seed bank. Abundant taxa were positioned more centrally within the networks, and Fe-C applications promoted cooperative interactions between abundant and rare species. Deterministic processes dominated the assembly of the rare subcommunity, while stochastic processes primarily influenced the abundant bacterial community. Fe-C amendments reduced community differentiation among rare taxa while increasing variability among abundant groups. Functional diversity of rare groups surpassed that of abundant groups, with notable enhancement in nitrogen cycling-related genes under Fe-C treatments. This study highlights the complementary roles of abundant and rare taxa in soil remediation, providing insights for optimizing remediation strategies. © 2025

关键词： Hematite

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Nitrogen and phosphorus removal under intermittent aeration conditions

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Journal of Environmental Sciences 2002年第4期14卷 541-546页

作者： XIA Si\|qing, GAO Ting\|yao, ZHOU Zeng\|yan (State key laboratory of pollution control and resource reuse, Tongji University, Shanghai 200092, China.) Tongji University State Key Laboratory of Pollution Control and Resource Reuse 上海 200092 Tongji University State Key Laboratory of Pollution Control and Resource Reuse 上海 200092

A practice wastewater treatment plant was operated using intermittent aeration activated sludge process to enhance biological nitrogen and phosphorus removal. When the influent concentrations of COD Cr , BOD 5, TN, TP, NH 3\|N, TKN, and SS varied in a range of 207.5—1640 mg/L, 61.8—637 mg/L, 28.5—75.6 mg/L, 4.38—20.2 mg/L, 13.6—31.9 mg/L, 28.5—75.6 mg/L, and 111—1208 mg/L, the effluent means were less than 50 mg/L, 20 mg/L, 5 mg/L, 1.0 mg/L, 5 mg/L, 10 mg/L, and 20 mg/L, respectively. Based on a long time of operating results, this process is very suitable for nutrient biological removal for treating the municipal wastewater those water characteristics are similar as that of the Songjiang Municipal Waste Water Treatment Plant(SJMWTP).

关键词： intermittent aeration process high concentration activated sludge nitrogen removal phosphorus removal

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Insights into the Synergistic Promotion Effect of Cu and W Modification on the Catalytic Performance of α-Fe2O3 for NH3-SCR of NOx

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Inorganic Chemistry 2025年第19期64卷 9798-9806页

作者： Cheng, Qianni Yan, Wanting Yang, Yirui Song, Wang Jin, Pengkai Ge, Chengyan Ma, Kaili Tan, Wei Sun, Jingfang Dong, Lin State Key Laboratory of Pollution Control and Resource Reuse School of Environment Jiangsu Key Laboratory of Vehicle Emissions Control Nanjing University Nanjing210023 China School of Chemistry and Chemical Engineering Nanjing University Nanjing210023 China Center of Modern Analysis Nanjing University Nanjing210023 China School of Chemistry and Chemical Engineering Yancheng Institute of Technology Yancheng224051 China Analysis and Testing Center Southeast University Nanjing211189 China

A dual-element modification strategy was proposed to promote the catalytic performance of the α-Fe2O3 catalyst for the selective catalytic reduction of NOx by NH3 (NH3-SCR of NOx) at both low and high temperatures. By optimizing the loading amount of CuO (4 wt %) and WO3 (5 wt %), a wide operating temperature window (150-350 °C) was achieved on the modified α-Fe2O3 catalyst (W5/Cu4/Fe). Further characterizations revealed that the enhanced low-temperature activity could be attributed to the improved redox performance of α-Fe2O3 through CuO modification, while the superior high-temperature activity was primarily ascribed to the enhanced surface acidity induced by WO3 modification. The synergistic effect of CuO and WO3 modifications facilitated the NH3-SCR reaction on the modified α-Fe2O3 catalysts to efficiently proceed through the Eley-Rideal (E-R) mechanism pathway. This provided compelling evidence that the catalytic performance of NH3-SCR catalysts at different temperatures was dominantly governed by distinct factors (e.g., redox property and surface acidity), offering valuable insights for the rational design of robust catalysts for NOx abatement. © 2025 American Chemical Society.

关键词： Redox reactions

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