IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-28 DOI: 10.1021/acs.est.5c01683

Xueye Wang, Wanting Kong, Xiaohu Zhai, Zhiwei Wang, Razi Epsztein, Xuesong Li

{"title":"Direct Quantification of Ion Partitioning and Diffusion Resistances in Reverse Osmosis Membranes via Electrochemical Impedance Spectroscopy","authors":"Xueye Wang, Wanting Kong, Xiaohu Zhai, Zhiwei Wang, Razi Epsztein, Xuesong Li","doi":"10.1021/acs.est.5c01683","DOIUrl":"https://doi.org/10.1021/acs.est.5c01683","url":null,"abstract":"Polyamide (PA) reverse osmosis (RO) membranes are crucial for water desalination and purification, where salt ion transport is governed by partitioning and diffusion through the PA film. Despite extensive research, decoupling these two steps and quantifying their relative contributions remain challenging due to the lack of reliable characterization methods. Here, we develop a rapid, reproducible electrochemical impedance spectroscopy (EIS) protocol incorporating advanced electrical equivalent circuits to directly quantify partitioning and diffusion resistance. Its validity is verified through membrane filtration experiments and activation energy analysis. Our findings reveal that diffusion dominates ion transport resistance, with values 4.5 to 6.0 times higher than partitioning resistance across diverse monovalent cations. However, we discovered a critical concentration-dependent behavior where partitioning resistance becomes increasingly significant at lower electrolyte concentrations, eventually equaling diffusion resistance near 0.1 mM. We also uncovered that the anomalously low rejection of NH4+ of RO membranes stemmed from significantly reduced diffusion resistance, likely due to moderate hydrogen-bonding interactions with membrane pores or its tetrahedral geometry. This quantitative insight into transport resistance mechanisms establishes new design principles for next-generation RO membranes, enabling tailored strategies for applications ranging from high-salinity desalination to the removal of low-concentration micropollutants.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"82 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fungi as a Critical Component of Lake Microbiota in Response to Cyanobacterial Harmful Algal Blooms 真菌是响应蓝藻有害藻华的湖泊微生物群的关键组成部分

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-28 DOI: 10.1021/acs.est.4c09164

Ze Zhao, Han Gao, Yuyi Yang, Ye Deng, Feng Ju

{"title":"Fungi as a Critical Component of Lake Microbiota in Response to Cyanobacterial Harmful Algal Blooms","authors":"Ze Zhao, Han Gao, Yuyi Yang, Ye Deng, Feng Ju","doi":"10.1021/acs.est.4c09164","DOIUrl":"https://doi.org/10.1021/acs.est.4c09164","url":null,"abstract":"Cyanobacterial Harmful Algal Blooms (CyanoHABs) pose a growing threat to lake ecosystems. While microbial communities constitute the resilient power of lake ecosystems to CyanoHAB disturbances, the role of fungi remains underexplored. Here, the dynamics of size-fractionated fungal and associated bacterial communities were tracked across the peak and decline stages of a CyanoHAB event in shallow subtropical Lake Taihu. The results revealed that the composition of fungal and bacterial communities in separated size fractions varied between bloom stages, with enrichment patterns likely influenced by their reliance on algal-derived nutrients. Null model-based analysis revealed a shift in fungal community assembly, from dominance by dispersal limitation (44%) and drift (30%) at the peak stage to increased homogeneous selection (44%) at the early decline stage, whereas bacterial communities remained predominantly shaped by stochastic processes, highlighting their distinct responses to cyanobacterial biomass decomposition. Comparative topological analysis of microbial co-occurrence networks showed strengthened cross-kingdom fungi-bacteria interactions as the bloom declined, especially within decomposing cyanobacterial colonies, facilitating nutrient cycling and accelerating cyanobacterial biomass removal. These findings led to a conceptual model proposing fungi as critical members of the freshwater microbiome in eutrophic lakes, driving biogeochemical cycling and potentially contributing to the resilience of the lake ecosystem against CyanoHABs.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"58 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrolytic Dehalogenation of Toxic Haloacetic Acids via Carbon Metabolism Regulation during Microbial Denitrification 微生物反硝化过程中碳代谢调节对有毒卤乙酸水解脱卤的影响

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-28 DOI: 10.1021/acs.est.5c04881

Yuting Wang, Jing Zhao, Jiyong Bian, Rui Li, Siqi Xu, Ruiping Liu, Yu-You Li, Huijuan Liu, Jiuhui Qu

{"title":"Hydrolytic Dehalogenation of Toxic Haloacetic Acids via Carbon Metabolism Regulation during Microbial Denitrification","authors":"Yuting Wang, Jing Zhao, Jiyong Bian, Rui Li, Siqi Xu, Ruiping Liu, Yu-You Li, Huijuan Liu, Jiuhui Qu","doi":"10.1021/acs.est.5c04881","DOIUrl":"https://doi.org/10.1021/acs.est.5c04881","url":null,"abstract":"Microbial denitrification is essential in the nitrogen cycle to enhance the quality of the reclaimed water. In addition to nitrogen removal, it has the potential to control trace pollutants. However, the fates of toxic disinfection byproducts (DBPs) on denitrification remain unelucidated. The current study focused on Paracoccus denitrificans (P. denitrificans) to investigate the response mechanisms of denitrifying microorganisms to HAAs, one of the main categories of DBPs. Upon exposure to 20 μM monoiodoacetic acid (MIAA), the number of extracellular reactive oxygen species in P. denitrificans increased to 2.7 times at 16 h. Concurrently, the specific nitrate reduction rate dropped by 9.3% and the specific growth rate declined by 26.7%, leading to the slowdown of the denitrification process. Nevertheless, P. denitrificans increased the activity of the tricarboxylic acid cycle and electron transport for sustainable denitrification under MIAA stress. Microbial hydrolytic dehalogenation contributed to over 70.0% MIAA removal, and it led to the release of iodine ions. MIAA was detoxified and concerted into low-molecular-weight organic acids, which then participated in carbon metabolism. The removal efficiency of different toxic HAAs was also compared to evaluate the adaptiveness of the DBP control. This research highlighted the interactions between denitrifying microorganisms and DBPs, providing new insights into the ecological safety protection of high-quality reclaimed water.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"3 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Key Contribution and Risk of Airborne Antibiotic Resistance: Total Suspended Particles or Settled Dust? 空气中抗生素耐药性的关键贡献和风险：总悬浮颗粒还是沉降尘埃？

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-28 DOI: 10.1021/acs.est.4c11038

Zi-Yin Chen, Fang-Zhou Gao, Hong Bai, Min Zhang, Liang-Ying He, You-Sheng Liu, Guang-Guo Ying

{"title":"Key Contribution and Risk of Airborne Antibiotic Resistance: Total Suspended Particles or Settled Dust?","authors":"Zi-Yin Chen, Fang-Zhou Gao, Hong Bai, Min Zhang, Liang-Ying He, You-Sheng Liu, Guang-Guo Ying","doi":"10.1021/acs.est.4c11038","DOIUrl":"https://doi.org/10.1021/acs.est.4c11038","url":null,"abstract":"The atmosphere is an important environmental medium in spreading antimicrobial resistance (AMR) in animal farming systems, yet the exposure risks associated with airborne pathways remain underexplored. This study employed metagenomic sequencing to investigate the airborne transmission of AMR in chicken farms (i.e., chicken feces, total suspended particles (TSP), and dust) and its exposure risks on the gut and nasal cavities of workers, office staff, and nearby villagers. Results revealed that TSP exhibited greater abundance, diversity, and transfer potential of antibiotic resistance genes (ARGs) compared to dust. The abundance of airborne resistome decreased with distance from the chicken house, and ARGs were estimated to spread up to 9.48 km within 1 h. While the gut resistome of workers and villagers showed limited differences, emerging tet(X) variants and high-risk dfrA remain future concerns. More nasal resistome was attributable to TSP compared to dust. Workers faced significantly higher inhalable exposures to antibiotic-resistant bacteria (ARB) and human pathogenic antibiotic-resistant bacteria (HPARB), exceeding those of office staff and villagers by an order of magnitude. We also compiled lists of high-risk and potential-risk airborne ARGs to inform monitoring. These findings highlight the need for regular air disinfection in animal farms and better protective measures for workers.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"34 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine Learning Reveals Key Adsorption Mechanisms for Oxyanions Based on Combination of Experimental and Published Literature Data 结合实验和发表的文献数据，机器学习揭示了氧离子的关键吸附机制

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-28 DOI: 10.1021/acs.est.5c03992

Ling Yuan, Han Zhang, Hang Yu, Rongming Xu, Weiming Zhang, Yanyang Zhang, Ming Hua, Lu Lv, Bingcai Pan

{"title":"Machine Learning Reveals Key Adsorption Mechanisms for Oxyanions Based on Combination of Experimental and Published Literature Data","authors":"Ling Yuan, Han Zhang, Hang Yu, Rongming Xu, Weiming Zhang, Yanyang Zhang, Ming Hua, Lu Lv, Bingcai Pan","doi":"10.1021/acs.est.5c03992","DOIUrl":"https://doi.org/10.1021/acs.est.5c03992","url":null,"abstract":"The development of new adsorbents for water treatment often involves complex adsorption mechanisms, whose individual contributions are unclear, thereby limiting the understanding of adsorption driving forces, making it difficult to achieve precise design of adsorbents. Machine learning (ML) has been used to uncover the impacts of these mechanisms through feature engineering, but progress is limited by the data quality for training. Herein, we developed a universal ML strategy for precisely predicting the adsorption capacity of polymers for oxyanions and identifying the adsorption driving force based on the combination of experimental and published literature data. The adsorption mechanism was explored through classification of RDkit descriptors with different SHAP importance values, and electrostatic interaction was found to be the driving force in the oxyanion adsorption process, which was further verified by theoretical calculations, adsorption experiments, and effective targeted adsorbent design. In comparison, analysis relying on a separate literature data source led to decreased model performance, some biased conclusions, and invalid targeted adsorbent design. Overall, this study proposed a strategy for data set optimization as well as dominant mechanism identification, which could shed light on better treatment of oxyanions in wastewater.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"10 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Long-Term Changes in Summertime Nitrate Chemistry in the Top Boundary Layer of North China 华北夏季上层边界层硝酸盐化学的长期变化

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-28 DOI: 10.1021/acs.est.5c03079

Liang Wen, Jian Gao, Likun Xue, Yang Li, Rui Gao, Wei Tang, Jiaqi Wang, Xiaohui Du, Yujie Zhang, Xinfeng Wang, Yujiao Zhu, Fahe Chai, Jingnan Hu, Guigang Tang, Jianmin Chen, Tao Wang, Aijun Ding, Hartmut Herrmann, Abdelwahid Mellouki, Can Dong, Haisheng Li, Zhaoxin Guo, Yong Zhao

{"title":"Long-Term Changes in Summertime Nitrate Chemistry in the Top Boundary Layer of North China","authors":"Liang Wen, Jian Gao, Likun Xue, Yang Li, Rui Gao, Wei Tang, Jiaqi Wang, Xiaohui Du, Yujie Zhang, Xinfeng Wang, Yujiao Zhu, Fahe Chai, Jingnan Hu, Guigang Tang, Jianmin Chen, Tao Wang, Aijun Ding, Hartmut Herrmann, Abdelwahid Mellouki, Can Dong, Haisheng Li, Zhaoxin Guo, Yong Zhao","doi":"10.1021/acs.est.5c03079","DOIUrl":"https://doi.org/10.1021/acs.est.5c03079","url":null,"abstract":"Reducing fine particulate nitrate (pNO3–) is critical for further mitigating PM2.5 pollution in China. However, previous NOx emission reductions have failed to achieve the expected pNO3– decreases. The present study reports that pNO3– concentration in summer increased by 55.8% and 5.6% at North China Peak (1534 m a.s.l.) from 2007 to 2014 and 2014 to 2021, respectively. pNO3– formation enhancement was caused mainly by decreased aerosol acidity due to notable SO42– reduction. pNO3– formation changed from a process limited by NH4+ to one colimited by NO2 and NH4+, suggesting an increased effect of NOx reduction on decreasing pNO3– production. Vertical transport represents a significant source of pNO3– near the surface, illustrating a percentage as high as 98% recorded during daytime hours and a proportion of 34% in the dark over North China in the simulation scenario during summer 2020. The scheme to reduce NOx emissions by 10% from 2020 to 2025 is predicted to slowly decrease aloft pNO3– over North China, which may facilitate further reductions in pNO3– concentrations near the surface via vertical transport. The inflection of nitrate chemistry in the top boundary layer suggests an opportunity to accelerate PM2.5 reduction under projected further emission reductions.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"10 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Throughput Monitoring of 323 Pharmaceuticals and Personal Care Products (PPCPs) and Pesticides in Surface Water for Environmental Risk Assessment 地表水中323种药品、个人护理用品和农药的高通量监测及其环境风险评估

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-27 DOI: 10.1021/acs.est.5c05363

Jingjing Du, Jian Xu, Yuanyuan Luo, Xiaowei Li, Liang Zhao, Saiwa Liu, Xi Jia, Zhinan Wang, Lirui Ge, Kexin Cui, Yu Ga, Mengxuan Zhu, Tianrun Ji, Zelong Huang, Xi Xia

{"title":"High-Throughput Monitoring of 323 Pharmaceuticals and Personal Care Products (PPCPs) and Pesticides in Surface Water for Environmental Risk Assessment","authors":"Jingjing Du, Jian Xu, Yuanyuan Luo, Xiaowei Li, Liang Zhao, Saiwa Liu, Xi Jia, Zhinan Wang, Lirui Ge, Kexin Cui, Yu Ga, Mengxuan Zhu, Tianrun Ji, Zelong Huang, Xi Xia","doi":"10.1021/acs.est.5c05363","DOIUrl":"https://doi.org/10.1021/acs.est.5c05363","url":null,"abstract":"The ubiquity of pharmaceuticals and personal care products (PPCPs) and pesticides in aquatic environments has raised significant ecological concerns due to their potential to disrupt aquatic ecosystems. This study presents a high-throughput ultraperformance liquid chromatography-tandem mass spectrometry method without sample enrichment to monitor 323 PPCPs and pesticides in the surface water of the Jingmi Water Diversion Canal in Beijing, China. One hundred and three PPCPs and pesticides were detected, with the highest detection frequency observed for antibiotics, which constituted 25.2% of the total detections. Notably, the average concentrations of detected PPCPs and pesticides were significantly higher in the winter (69.0 ng/L) than in the summer (42.1 ng/L). Spatial characterization indicated higher concentrations of PPCPs and pesticides in urban areas compared with suburban areas, with carbendazim, caffeine, atrazine, and diazepam being the most frequently detected compounds. The ecological risk assessment based on risk quotient values identified moderate to high risks for aquatic organisms, particularly in urban areas and during winter. These findings highlight the necessity for improved wastewater treatment technologies and continuous environmental monitoring to protect aquatic ecosystems from the adverse effects of PPCPs and pesticides.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"25 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Promoting Low-Temperature Toluene Oxidation via Pt–O–Fe Interfacial Sites in a Pt/CuO–Fe3O4 Catalyst Pt/ CuO-Fe3O4催化剂中Pt - o - fe界面位促进甲苯低温氧化

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-27 DOI: 10.1021/acs.est.5c02048

Meijuan Chen, Lijuan Fu, Dandan Zhu, Yu Huang, Rong Li, Shu He, Suixin Liu, Shun-cheng Lee, Junji Cao

{"title":"Promoting Low-Temperature Toluene Oxidation via Pt–O–Fe Interfacial Sites in a Pt/CuO–Fe3O4 Catalyst","authors":"Meijuan Chen, Lijuan Fu, Dandan Zhu, Yu Huang, Rong Li, Shu He, Suixin Liu, Shun-cheng Lee, Junji Cao","doi":"10.1021/acs.est.5c02048","DOIUrl":"https://doi.org/10.1021/acs.est.5c02048","url":null,"abstract":"Electronic metal-support interaction (EMSI) has been widely explored in the catalytic degradation of volatile organic compounds (VOCs) owing to the formation of special interfacial sites. Herein, the EMSI effect was engineered by constructing the serial Pt catalysts supported on CuO–Fe3O4 bimetal oxide (Pt/CFO). Among them, the 0.5Pt/CFO catalyst with 0.5 wt % Pt loading exhibited an outstanding catalytic activity, with T90 (the temperature of 90% toluene conversion) lowered to 185 °C, and displayed excellent stability and water resistance. Comprehensive physicochemical characterizations revealed that an evident electron transfer occurred via the interface structure (Pt–O–Fe), producing the positively charged Pt (Ptδ+) and abundant Fe2+ species. Notably, the increased electron density around the Fe species weakened the Fe–O bond and thus activated the surface lattice oxygen (Olatt). Further, temperature-programmed desorption experiments and in situ diffuse reflectance infrared Fourier transform spectroscopy results demonstrated that the electron-deficient Ptδ+ was conducive to the adsorption and activation of toluene at low temperature. Consequently, the deep oxidation of toluene was achieved with the participation of Olatt, benefiting from the Ptδ+–O–Fe2+ interfacial sites with synergistic catalysis for toluene adsorption and oxygen activation. This work provides an interesting idea to explore the relationship between the electron transfer effect and highly efficient VOC abatement.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"134 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid Physical Mechanism and Artificial Intelligence–Based Model for Evaluating Nonpoint Source Pesticide Pollution at a Megacity Scale 特大城市非点源农药污染评价的混合物理机制与人工智能模型

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-27 DOI: 10.1021/acs.est.4c14075

Zhao Guo, Qian-Qian Zhang, Ya-Ya Cai, Zi-Yang Wen, Jian-Liang Zhao, Guang-Guo Ying

{"title":"Hybrid Physical Mechanism and Artificial Intelligence–Based Model for Evaluating Nonpoint Source Pesticide Pollution at a Megacity Scale","authors":"Zhao Guo, Qian-Qian Zhang, Ya-Ya Cai, Zi-Yang Wen, Jian-Liang Zhao, Guang-Guo Ying","doi":"10.1021/acs.est.4c14075","DOIUrl":"https://doi.org/10.1021/acs.est.4c14075","url":null,"abstract":"Large-scale nonpoint source (NPS) pesticide pollution is a growing concern in urban areas; however, modeling of such pollution is constrained by challenges in acquiring urban pipeline data and the scarcity of pollutant monitoring data. This study presents a hybrid model comprising a rainfall runoff module based on a modified gated recurrent unit and a pesticide concentration module grounded in physical process equations to assess NPS pesticide pollution in large urban areas, adopting Guangzhou City as a case study. The model parameters were calibrated and validated using monitored runoff volumes and pesticide concentrations, employing a stochastic gradient descent algorithm. The results indicated that the developed model performed well, matching or exceeding the performance of traditional NPS models in small urban areas. NPS pesticide pollution in this area exhibited spatiotemporal characteristics impacted by meteorological conditions. Washoff loads were positively correlated with maximum pesticide concentrations and runoff volumes but not when they were preceded by dry periods. The initial rainfall intensity, rather than the total rainfall volume, affected pesticide washoff amounts. The findings of the study provide insight into urban NPS pesticide pollution and its causes, while the model shows promise for modeling emerging pollutants in any urban area.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"128 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Plastic Biodegradation by Sediment Microbial Populations under Denitrifying Conditions. 反硝化条件下沉积物微生物群落对塑料的生物降解。

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-27 DOI: 10.1021/acs.est.4c12187

Xiaoxu Sun,Shuni Wang,Zhiyuan Lin,Zhenyu Chen,Wei Huang,Tianle Kong,Duanyi Huang,Baoqin Li,Haihan Zhang,Weimin Sun

{"title":"Plastic Biodegradation by Sediment Microbial Populations under Denitrifying Conditions.","authors":"Xiaoxu Sun,Shuni Wang,Zhiyuan Lin,Zhenyu Chen,Wei Huang,Tianle Kong,Duanyi Huang,Baoqin Li,Haihan Zhang,Weimin Sun","doi":"10.1021/acs.est.4c12187","DOIUrl":"https://doi.org/10.1021/acs.est.4c12187","url":null,"abstract":"Biodegradation is critical for eliminating plastic contaminants from environments, and understanding its mechanisms under in situ conditions is crucial. The plastic biodegradation process in sediments, a major reservoir of plastic contamination with reduced redox conditions, remains elusive. This study compared the plastisphere communities and metabolic potentials of typical polyethylene (PE) contaminants collected from the Pearl River Estuary to their counterparts in the surrounding sediments. The results revealed a distinct plastisphere community composition, with the consistent enrichment of a group of core plastisphere populations compared to those of the sediments. Functional genes related to both potential aerobic and anaerobic PE biodegradation were encoded by the core plastisphere populations. Microcosm incubations were performed to assess the PE biodegradation potentials under denitrifying conditions. The results demonstrated that the polyethylene (PE) mineralization efficiencies were comparable under aerobic and denitrifying conditions through incubations with 13C-PE. Development of functional groups on PE surfaces and the reduction in molecular weights further supported PE biodegradation under denitrifying conditions. The elevated laccase and lignin peroxidase activities implied their potential contribution to PE depolymerization under denitrifying conditions. Together, the sediment plastisphere microbiome holds the potential for plastic degradation under denitrifying conditions, which should be considered when assessing the fate of plastic contaminants.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"53 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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