ACS Es&t Water最新文献_第7页

Transient Adsorption of Zwitterionic Fluoroquinolones on Goethite During Freeze–Thaw Cycles 在冻融循环过程中闪烁离子氟喹诺酮类药物在网纹石上的瞬态吸附

ACS Es&t Water Pub Date : 2024-08-13 DOI: 10.1021/acsestwater.4c00472

Tao Chen, Tao Luo, Tra My Bui Thi, Jean-François Boily, Khalil Hanna

{"title":"Transient Adsorption of Zwitterionic Fluoroquinolones on Goethite During Freeze–Thaw Cycles","authors":"Tao Chen, Tao Luo, Tra My Bui Thi, Jean-François Boily, Khalil Hanna","doi":"10.1021/acsestwater.4c00472","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00472","url":null,"abstract":"Fluoroquinolones, a class of antibiotics, have been detected in various aquatic environments, including those experiencing freeze–thaw cycles. This study investigated the adsorption of ciprofloxacin (CIP) in frozen (−21 °C) and aqueous (25 °C) solutions under varying pH levels, electrolyte types, and ionic strengths. CIP sorption on goethite was found to be transient, as freezing re-establishes equilibrium, nearly doubling CIP loadings at acidic to circumneutral pH values. The original equilibrium was restored by thawing. Our investigation reveals that ion pairs, formed between the positively charged piperazine group of CIP and anions (Cl–, Br–, and NO3–), create a charge-shielding effect, explaining the transient nature of CIP sorption equilibrium at goethite-water interfaces. In situ ATR-FTIR observations and model predictions further confirm the significant role of ion-paired surface complexes in transient CIP sorption. The transience of CIP sorption equilibrium in frozen and aqueous solutions is attributed to the local concentrations of anions, which undergo freeze-concentration into liquid intergrain boundaries and dilution by reversible ice nucleation and thawing. As the interaction between the hydrosphere and cryosphere intensifies with climate change, these findings have significant implications for evaluating the fate of contaminants in both terrestrial and aquatic environments.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142203222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Significant CH4 Emissions from the Yellow River: Importance of Suspended Sediment 黄河的大量 CH4 排放：悬浮物的重要性

ACS Es&t Water Pub Date : 2024-08-13 DOI: 10.1021/acsestwater.4c00476

Shuo Wang, Shengjie Li, Mingfei Ji, Zhuo Jiang, Zhengzhu Dang, Shuqi Zhang, Jiarui Li, Xianfang Zhu, Guodong Ji

{"title":"Significant CH4 Emissions from the Yellow River: Importance of Suspended Sediment","authors":"Shuo Wang, Shengjie Li, Mingfei Ji, Zhuo Jiang, Zhengzhu Dang, Shuqi Zhang, Jiarui Li, Xianfang Zhu, Guodong Ji","doi":"10.1021/acsestwater.4c00476","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00476","url":null,"abstract":"Rivers play a non-negligible role in global methane (CH4) emissions. However, little research has focused on CH4 emissions from rivers with high suspended sediment (SPS) concentrations, and how SPS influences riverine CH4 emissions is still unclear. In this study, significant CH4 emissions were observed in the upper reaches of the Yellow River, despite the extremely low organic-C level (DOC = 2.2 mg/L). The average value of CH4 flux was 107.7 μmol m–2 d–1, which was even higher than that of urban rivers with high organic pollution. The CH4 emission pattern in the Yellow River differed from that of typical rivers; SPS rather than sediment plays an important role. In the upper reaches, anaerobic/aerobic microenvironments are more easily established on SPS under lower DO conditions, resulting in a high abundance of methanogens and functional genes. The genus Methanobacterium, typically found in sediments, was dominant in the water column and positively related to SPS concentrations. The strong winds and water flow further enhanced the mass transfer from the SPS surface to the atmosphere. Overall, this study demonstrates the significant potential of low-organic-country rivers to act as CH4 hotspots in the presence of SPS.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142203227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kinetics of 1,4-Dioxane Adsorption by AmberSorb and Granular Activated Carbon AmberSorb 和颗粒活性炭对 1,4-二恶烷的吸附动力学

ACS Es&t Water Pub Date : 2024-08-12 DOI: 10.1021/acsestwater.4c00132

Ermias Gebrekrstos Tesfamariam, Dennis Ssekimpi, Youneng Tang

{"title":"Kinetics of 1,4-Dioxane Adsorption by AmberSorb and Granular Activated Carbon","authors":"Ermias Gebrekrstos Tesfamariam, Dennis Ssekimpi, Youneng Tang","doi":"10.1021/acsestwater.4c00132","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00132","url":null,"abstract":"1,4-Dioxane is an emerging water contaminant that is likely to be carcinogenic to humans. Its treatment is challenging due to its high water solubility, low Henry’s law constant, and low partition coefficients. Adsorption has been widely studied for removing 1,4-dioxane. Although the adsorption kinetics and isotherms of several water pollutants have been widely studied, little is known about the adsorption kinetics of 1,4-dioxane. In this study, the kinetics of 1,4-dioxane adsorption by AmberSorb and Granular Activated Carbon (GAC) were investigated. A homogeneous surface diffusion model was developed to describe the adsorption of 1,4-dioxane in continuous-flow and batch systems. The external mass-transfer and internal diffusion coefficients of 1,4-dioxane for AmberSorb (1.79 × 10–3 cm/min and 3.52 × 10–4 cm2/min) were determined about five- and thirty-fold larger than that of their corresponding parameters for GAC. For both adsorbents, the adsorption was limited by the mass-transfer across the fluid film that covers the adsorbent and the adsorbent–adsorbate interaction at the adsorbent surface but not limited by the diffusion within the adsorbent. While the mass-transfer across the external fluid film affected the maximum 1,4-dioxane removal percentage and the adsorption rate, the isotherm parameters mainly controlled the adsorption capacity and adsorbent service life.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142203228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapidly Predicting Aqueous Adsorption Constants of Organic Pollutants onto Polyethylene Microplastics by Combining Molecular Dynamics Simulations and Machine Learning 分子动力学模拟与机器学习相结合，快速预测聚乙烯微塑料对有机污染物的水吸附常数

ACS Es&t Water Pub Date : 2024-08-12 DOI: 10.1021/acsestwater.4c00463

Lihao Su, Zhongyu Wang, Zijun Xiao, Deming Xia, Ya Wang, Jingwen Chen

{"title":"Rapidly Predicting Aqueous Adsorption Constants of Organic Pollutants onto Polyethylene Microplastics by Combining Molecular Dynamics Simulations and Machine Learning","authors":"Lihao Su, Zhongyu Wang, Zijun Xiao, Deming Xia, Ya Wang, Jingwen Chen","doi":"10.1021/acsestwater.4c00463","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00463","url":null,"abstract":"Adsorption of aqueous organic pollutants onto microplastics influences the exposure and risks of both the pollutants and microplastics. Experimental determination of the aqueous adsorption equilibrium constants (Kaq) that characterize the adsorption capacity of microplastics to pollutants is laborious and inefficient since the Kaq values rely on various combinations of conditions, such as pH, ionic strength, and particle sizes. Herein, molecular dynamics (MD) methods were established by comparing the MD-calculated Kaq values with the empirical values of 14 compounds adsorbed onto polyethylene (PE) microplastics having different particle sizes (10–250 μm) in pure water and seawater. Based on the data sets consisting of experimental and MD-calculated Kaq values, machine learning models were constructed. A gradient boosting decision tree (GBDT) model requires only easily obtainable Mordred descriptors for pollutants and desired conditions (particle sizes and ionic strength) to yield accurate results, with an external determination coefficient of 0.99. The GBDT model exhibits a great improvement over the previous one, as it incorporates multiple factors including ionic strength from pure water to seawater, dissociation species at different pH, and PE particle sizes with diameters ranging from nanometers to micrometers. This study paves a new way for high-throughput estimating K values for microplastics and pollutants at different environmental conditions.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142203229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Guidance for Residents Addressing Copper Problems in Drinking Water: Opportunities and Challenges 解决饮用水中铜问题的居民指南：机遇与挑战

ACS Es&t Water Pub Date : 2024-08-12 DOI: 10.1021/acsestwater.4c00447

Rebecca Kriss, Marc A. Edwards

{"title":"Guidance for Residents Addressing Copper Problems in Drinking Water: Opportunities and Challenges","authors":"Rebecca Kriss, Marc A. Edwards","doi":"10.1021/acsestwater.4c00447","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00447","url":null,"abstract":"Residents and their pets may experience aesthetic or health concerns resulting from elevated copper in their drinking water. The United States Environmental Protection Agency Lead and Copper Rule focuses on addressing systemwide corrosion issues, but gaps in the rule leave some municipal water consumers and residents with private well water vulnerable to high cuprosolvency. We developed guidance to aid residents in understanding, detecting, and addressing cuprosolvency issues in their drinking water. Three types of at-home test kits for copper and one for pH were determined to be accurate enough (R2 > 0.9 (lab, based on average values from n = 5 replicates each) and >0.7 (field)) to detect concerns related to high cuprosolvency and inform selection of intervention options. Case study results indicate that, although water treatments such as increasing pH on-site may be effective, long-term treatment (>36 weeks or permanently) may be needed to maintain reductions in cuprosolvency. A decision tree is provided to help residents and citizen scientists navigate these concerns for both public water systems and private wells.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"106 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142203223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Improved 21st Century Judicial System with Environmental Science Expertise is Needed for Resolving Interstate Water Conflicts 解决州际水冲突需要一个具备环境科学专业知识的 21 世纪完善司法系统

ACS Es&t Water Pub Date : 2024-08-07 DOI: 10.1021/acsestwater.4c00289

Nimisha Wasankar, Heather Elliott, T. Prabhakar Clement

{"title":"An Improved 21st Century Judicial System with Environmental Science Expertise is Needed for Resolving Interstate Water Conflicts","authors":"Nimisha Wasankar, Heather Elliott, T. Prabhakar Clement","doi":"10.1021/acsestwater.4c00289","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00289","url":null,"abstract":"As stresses on groundwater resources increase due to growing population and climate change, water litigation, such as the recently decided Mississippi (MS) vs Tennessee (TN) lawsuit, will become more common. In the United States, lawsuits between states can be heard only by the Supreme Court of the United States (SCOTUS). These lawsuits are expensive and lengthy, often requiring highly specialized technical expertise. In the MS vs TN case, the Court unanimously held that an interstate aquifer is subject to equitable apportionment. Although this appears to be a sound resolution, a careful examination of the SCOTUS hearing transcript revealed that the Justices had several egregious misconceptions about the groundwater system. These misconceptions arose in part due to the failure of technical experts to communicate groundwater concepts in understandable terms and in part due to the Justices’ lack of expertise in groundwater science. To address these issues, we first explore methods for improving scientific communication in courtrooms. Second, we propose ideas for reforming the legal system and provide compelling arguments for using the lower courts to hear such cases. We also explore the possibility of creating specialized federal water courts to resolve water disputes.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141944438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biosorption of Cadmium and Chromium from Wastewater Using Bacillus xiamenensis and Bacillus cereus Isolated from the Sugarcane Rhizosphere 利用分离自甘蔗根瘤菌的厦门芽孢杆菌和蜡样芽孢杆菌对废水中的镉和铬进行生物吸附

ACS Es&t Water Pub Date : 2024-08-06 DOI: 10.1021/acsestwater.4c00406

Sania Javed, Ashraf Ali, Sadia Alam, Mazhar Rafique, Bushra Gul, Hassan Javed Chaudhary, Eman Y. Santali

{"title":"Biosorption of Cadmium and Chromium from Wastewater Using Bacillus xiamenensis and Bacillus cereus Isolated from the Sugarcane Rhizosphere","authors":"Sania Javed, Ashraf Ali, Sadia Alam, Mazhar Rafique, Bushra Gul, Hassan Javed Chaudhary, Eman Y. Santali","doi":"10.1021/acsestwater.4c00406","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00406","url":null,"abstract":"In this study, bacteria Bacillus cereus and Bacillus xiamenensis were used for the biosorption of Cd (II) and Cr (VI) from wastewater. The effects of contact time, pH, and metal ion concentration on the biosorption of Cd (II) and Cr (VI) were studied. The minimum inhibitory concentration (MIC) exhibited by Bacillus cereus was 6 mM for Cd (II) and 7 mM for Cr (VI), and that of Bacillus xiamenensis was 8 mM for Cd (II) and 7 mM for Cr (VI). Bacillus xiamenensis achieved a maximum uptake of 90.70% for Cr (VI) and 84.32% for Cd (II), while Bacillus cereus achieved a maximum uptake of 96.87% for Cr (VI) and 92.15% for Cd (II) in 60 min. The maximum adsorption capacities of Bacillus xiamenensis for Cd (II) and Cr (VI) were 150.02 and 201.2 mg/g, respectively, while the values for Bacillus cereus were 180.76 and 273.49 mg/g for Cd (II) and Cr (VI), respectively. The isotherm study showed that the biosorption data of Cd (II) and Cr (VI) fitted well with the Freundlich isotherm model. The results revealed that Bacillus cereus and Bacillus xiamenensis exhibited promising potential for the removal of Cd (II) and Cr (VI) from metal-contaminated water.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141944437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Water Disinfection: Unleashing the Power of Bicarbonate Ions in Chitosan–Silver Nanocomposite for Greener and More Efficient Silver Utilization 水消毒：释放壳聚糖-银纳米复合材料中碳酸氢根离子的能量，实现更绿色、更高效的银利用

ACS Es&t Water Pub Date : 2024-08-06 DOI: 10.1021/acsestwater.4c00163

Uthradevi Kannan, Gayathri Pullangott, Nikita Shraogi, Amesh P, Satyakam Patnaik, Shihabudheen M. Maliyekkal

{"title":"Water Disinfection: Unleashing the Power of Bicarbonate Ions in Chitosan–Silver Nanocomposite for Greener and More Efficient Silver Utilization","authors":"Uthradevi Kannan, Gayathri Pullangott, Nikita Shraogi, Amesh P, Satyakam Patnaik, Shihabudheen M. Maliyekkal","doi":"10.1021/acsestwater.4c00163","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00163","url":null,"abstract":"The paper reveals the synergetic effect of bicarbonate alkalinity in enhancing the disinfection of silver-based nanocomposite film. This study originates from an in-depth investigation into how critical ions and natural organic matter in freshwater influence disinfection. The results show that the higher concentrations of chlorides (>400 mg/L) and natural organic matter (>1.5 mg/L) adversely affected the composite disinfection ability as expected. Intriguingly, the nanocomposite shows enhanced disinfection in the presence of bicarbonate alkalinity and hardness. A detailed investigation shows that bicarbonate plays a vital role in enhancing disinfection. The studies reveal a synergy between bicarbonate and Ag+ released from a nanocomposite film. The bicarbonates disturb the transmembrane potential gradient (ΔpH), weaken the proton motive force of (Escherichia coli), and enable an increased penetration of Ag+ into the cell, resulting in enhanced production of reactive oxygen species and cell damage. This synergetic effect could help reduce the costs and concentration of Ag+ required for disinfection and their associated risks. The cytotoxic studies against human cell lines (HaCaT) confirm that AgNC-treated water is safe for consumption. The synergetic disinfection effect of silver with bicarbonate in water helps in developing more resource-efficient and reliable silver-based disinfection systems.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141944435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecular Response of Dissolved Organic Matter in Aquifer to Landfill Leachate Leakage 含水层中溶解有机物对垃圾填埋场渗滤液渗漏的分子反应

ACS Es&t Water Pub Date : 2024-08-06 DOI: 10.1021/acsestwater.4c00233

Xian-Ge Wang, Wei He, Xian-Jiang Zeng, Xu Cao, Qing-Yu Liu, Xiao-Song He

{"title":"Molecular Response of Dissolved Organic Matter in Aquifer to Landfill Leachate Leakage","authors":"Xian-Ge Wang, Wei He, Xian-Jiang Zeng, Xu Cao, Qing-Yu Liu, Xiao-Song He","doi":"10.1021/acsestwater.4c00233","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00233","url":null,"abstract":"This study investigated changes in groundwater dissolved organic matter (DOM) composition resulting from leachate leakage and examined the causes of these changes by simulating the contamination process through soil column and adsorption experiments. The results showed that contaminated groundwater had higher humification degree, chemical diversity, and unsaturation of DOM compared to uncontaminated groundwater. Five fractions were identified in landfill leachate, with fulvic-like acid and building blocks of humic substance fractions (0.45–2.5 kDa) being poorly retained by soil upon leakage. In contrast, high-molecular humic-like acid and biopolymer fractions (>2.5 kDa) as well as low-molecular organic fractions (<0.45 kDa) were readily adsorbed in soil, leading to the appearance and intensification of characteristic fluorophores at excitation/emission wavelengths of 250, 310, 365 nm/460 nm in contaminated groundwater. The characteristic fluorophore representative molecules comprised highly unsaturated structures with low- and high-oxygen content (79.6%) with high oxidizability, aromaticity, and unsaturation. To the best of our knowledge, this was the first report of the medium-molecular-weight organics in leachate preferentially entering groundwater rather than the low-molecular weight organics. This study facilitates to deepen the understanding of groundwater contamination by leachate leakage and provides theoretical support for early warning of leachate leakage contamination.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141944436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Riverine Pesticides in an Agricultural Catchment in Northern Thailand: With Focus on Atrazine and Metabolites 泰国北部农业集水区河流中的农药：以莠去津和代谢物为重点

ACS Es&t Water Pub Date : 2024-08-03 DOI: 10.1021/acsestwater.3c00764

Theodora Hui Yian Lee, Alan D. Ziegler, Caixia Li, Khajornkiat Srinuansom, Shane Allen Snyder

{"title":"Riverine Pesticides in an Agricultural Catchment in Northern Thailand: With Focus on Atrazine and Metabolites","authors":"Theodora Hui Yian Lee, Alan D. Ziegler, Caixia Li, Khajornkiat Srinuansom, Shane Allen Snyder","doi":"10.1021/acsestwater.3c00764","DOIUrl":"https://doi.org/10.1021/acsestwater.3c00764","url":null,"abstract":"This study investigates the longitudinal and temporal trends of atrazine, a persistent herbicide, in the Mae Sa catchment in northern Thailand. Concentrations of atrazine determined from targeted analysis were elevated during the wet season, and great variability was observed in relation to individual storm runoff hydrographs. When compared to regulatory limits, the observed atrazine concentrations in Mae Sa were generally below environmental thresholds of concern. However, greater risk may occur in other tributary systems feeding the Ping River, where some concentrations exceeding 2000 ng/L were observed, although they were not sustained for extended periods of time. Additionally, nontargeted screening identified 16 other agrochemicals with known potential environmental risks or associated toxicity. Despite the minor risk posed by atrazine alone, the research highlights the intricate interplay of agricultural practices, diverse pesticide application, and hydroclimatic factors in influencing pesticide dynamics. In the broader context, this study underscores the challenge of estimating risks arising from pesticide mixtures while using a combination of targeted analysis, nontargeted screening, in silico prediction models, and in vitro bioassays. Collectively, we find evidence of the presence of more than 100 pesticides in the catchment since dedicated work began there more than a decade ago.","PeriodicalId":7078,"journal":{"name":"ACS Es&t Water","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141881978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0