ACS ES&T water最新文献_第9页

Nitrate and Carbon Availability as Drivers of Isotopic Fractionation of Nitrate in Estuarine Sediments 河口沉积物中硝酸盐同位素分馏的驱动因素：硝酸盐和碳有效性

IF 4.3

ACS ES&T water Pub Date : 2025-07-29 DOI: 10.1021/acsestwater.5c00310

Anniet M. Laverman*, Guillaume Humbert and Mathieu Sebilo,

{"title":"Nitrate and Carbon Availability as Drivers of Isotopic Fractionation of Nitrate in Estuarine Sediments","authors":"Anniet M. Laverman*, Guillaume Humbert and Mathieu Sebilo, ","doi":"10.1021/acsestwater.5c00310","DOIUrl":"https://doi.org/10.1021/acsestwater.5c00310","url":null,"abstract":"This study investigates isotopic fractionation associated with nitrate reduction in estuary sediments, focusing on the influence of nitrate and organic carbon availability. Flow-through reactor experiments using sediments from the Trieux, Seine, and Scheldt estuaries revealed that the isotopic enrichment factor (ε) varied widely, showing an inverse relationship with nitrate reduction rates only under nonlimiting nitrate conditions. Under these conditions, increasing reduction rates diminished enzyme selectivity, leading to lower isotopic discrimination, while at lower rates, isotopic enrichment increased due to substrate selectivity. The addition of carbon further enhanced reduction rates, confirming the carbon limitation as a key driver of isotopic fractionation patterns. These results highlight the importance of substrate availability in shaping isotopic signatures in natural sediments beyond reduction rates alone. Our findings provide critical insights for interpreting nitrate isotopic data in field studies, emphasizing the need to consider local substrate dynamics for accurate assessments of nitrogen cycling in coastal ecosystems.","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 8","pages":"4609–4617"},"PeriodicalIF":4.3,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144807284","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

Analyzing Spatiotemporal Changes and Drivers of the Water Yield Service in the Malian River Basin on the Loess Plateau, China 黄土高原马连河流域水量服务时空变化及驱动因素分析

IF 4.3

ACS ES&T water Pub Date : 2025-07-28 DOI: 10.1021/acsestwater.5c00364

Yayu Gao*, Jinhua Tian, Yu Song, Yupei Hu, Jianbin Hao and Hefei Liu,

{"title":"Analyzing Spatiotemporal Changes and Drivers of the Water Yield Service in the Malian River Basin on the Loess Plateau, China","authors":"Yayu Gao*, Jinhua Tian, Yu Song, Yupei Hu, Jianbin Hao and Hefei Liu, ","doi":"10.1021/acsestwater.5c00364","DOIUrl":"https://doi.org/10.1021/acsestwater.5c00364","url":null,"abstract":"In the context of global climate change and increasing water scarcity, water yield (WY) service has gained widespread scientific attention. This study analyzed spatial distribution and variations of the WY service in the Malian River Basin (MRB) from 1990 to 2020, as well as its influencing drivers, using the integrated valuation of ecosystem services and trade-offs (InVEST) model. Results indicated that the WY spatial distribution of MRB remained stable over time, showing a step-like pattern from north to south. The WY values in the basin in 1990, 2000, 2010, and 2020 were 4.563 × 108, 2.640 × 108, 3.853 × 108, and 3.264 × 108 m3, respectively. The global Moran’s I (0.925–0.928) exhibited a significant positive spatial autocorrelation overall. Precipitation (PRE) had the greatest impact on the spatial differentiation of the WY service (Pearson’s r = 0.76–0.80), showed positive correlation, while elevation (ELE), actual evapotranspiration (AET), temperature (TEM), and normalized difference vegetation index (NDVI) showed negative correlations. The lower reaches of MRB were identified as a critical WY service and spatial correlation area requiring protection. This study provides theoretical and scientific bases for water resource management on the similar Loess Plateau regions, the InVEST model with local parametrization can also be applied to these regions.","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 8","pages":"4655–4668"},"PeriodicalIF":4.3,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144807479","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

The Inadequacy of Flushing in Maintaining Water Quality in Gravity-Fed Supply Systems with Storage Tanks during Prolonged Lockdowns 在长时间闭闸期间，冲厕不足以维持带储罐的重力供水系统的水质

IF 4.3

ACS ES&T water Pub Date : 2025-07-25 DOI: 10.1021/acsestwater.5c00298

Deepika Bhaskar, and , Gargi Singh*,

{"title":"The Inadequacy of Flushing in Maintaining Water Quality in Gravity-Fed Supply Systems with Storage Tanks during Prolonged Lockdowns","authors":"Deepika Bhaskar,  and , Gargi Singh*, ","doi":"10.1021/acsestwater.5c00298","DOIUrl":"https://doi.org/10.1021/acsestwater.5c00298","url":null,"abstract":"The efficacy of fixture flushing in intermittently supplied, gravity-fed water networks during extended lockdowns is unclear. A laboratory-scale premise water supply system with a secondary storage tank was operated over 52 weeks, comparing daily flushing (DF) versus flushing every 3 days (O3DF) to preserve water quality. Tap water from buildings and overhead tanks (OHTs) collected before the pandemic served as benchmarks for typical water quality under normal usage. The water quality index followed the trend DF = O3DF < building < OHTs, indicating both flushing regimes resulted in “poor” water quality. Moreover, O3DF samples had higher levels of 16S rRNA gene copies, sul1, and intI1 than DF. Biofilm analyses showed sul1, intI1, and Legionella pneumophila DNA markers were most abundant in elbows, followed by corroded pipe sections, then taps. Importantly, heavy metal content exceeded drinking water standards in some flush samples: 32% of DF and 31% of O3DF samples surpassed lead limits, while 48% of DF and 35% of O3DF exceeded iron limits. These results indicate that intermittent flushing alone fails to ensure safe water quality in storage tank systems during prolonged stagnation, emphasizing the need for updated maintenance and risk mitigation strategies during extended low-occupancy periods like lockdowns.","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 8","pages":"4584–4595"},"PeriodicalIF":4.3,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144807107","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

Purifying Anaerobically Treated Municipal Secondary Wastewater Effluent by a Reverse Osmosis-Based Potable Reuse Treatment Train 以反渗透为基础的饮用水回用处理系统净化厌氧处理的城市二级污水出水

IF 4.3

ACS ES&T water Pub Date : 2025-07-24 DOI: 10.1021/acsestwater.5c00535

Jessica A. MacDonald, Benjamin Najm, Tzahi Cath and William A. Mitch*,

{"title":"Purifying Anaerobically Treated Municipal Secondary Wastewater Effluent by a Reverse Osmosis-Based Potable Reuse Treatment Train","authors":"Jessica A. MacDonald, Benjamin Najm, Tzahi Cath and William A. Mitch*, ","doi":"10.1021/acsestwater.5c00535","DOIUrl":"https://doi.org/10.1021/acsestwater.5c00535","url":null,"abstract":"As a pretreatment to potable reuse trains, anaerobic secondary treatment could reduce the energy demand and footprint compared to aerobic secondary treatment. Long-term pilot tests linked a reverse osmosis (RO)-based potable reuse treatment system to a pilot-scale staged anaerobic fluidized membrane bioreactor (SAF-MBR). A membrane-aerated bioreactor removed sulfide in SAF-MBR effluent prior to RO. The RO operated for ∼120 days at 15 LMH and 67–83% water recovery, with a final feed pressure during each cycle of ∼9–10 bar. When the final pressure increased to ∼12 bar, chemical cleaning reestablished membrane performance, and a membrane autopsy indicated reversible fouling by biomass and phosphate-based minerals. MS2 bacteriophage spiking tests indicated at least 5–6-log removal each by RO and UV/H2O2 advanced oxidation process (AOP) treatment at ∼730 mJ/cm2 average UV fluence. A 1,100 mJ/cm2 average UV fluence met treatment goals for 1,4-dioxane and indicators for other organic contaminants. Halogenated DBPs in the chlorinated final effluent were ∼5-fold lower than potable reuse trains fed by aerobic secondary effluent. N-Nitrosodimethylamine was well below California’s 10 ng/L Notification Limit. An operating cost comparison indicated that a potable reuse train fed by SAF-MBR effluent ($0.69/m3) is cost-competitive to that fed by aerobic secondary effluent ($0.69/m3).","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 8","pages":"4877–4886"},"PeriodicalIF":4.3,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144807153","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

Vegetation Density Modulates Spatiotemporal Variations of CO2 Emission in Urban Aquatic Systems 植被密度对城市水生系统CO2排放时空变化的调节

IF 4.3

ACS ES&T water Pub Date : 2025-07-24 DOI: 10.1021/acsestwater.5c00558

Xiaokang Tian, Menglin Liu, Xuedong Zheng, Yuyi Yang, Wenjun Yang, Chen Ye and Siyue Li*,

{"title":"Vegetation Density Modulates Spatiotemporal Variations of CO2 Emission in Urban Aquatic Systems","authors":"Xiaokang Tian, Menglin Liu, Xuedong Zheng, Yuyi Yang, Wenjun Yang, Chen Ye and Siyue Li*, ","doi":"10.1021/acsestwater.5c00558","DOIUrl":"https://doi.org/10.1021/acsestwater.5c00558","url":null,"abstract":"Urban aquatic systems serve as significant contributors to atmospheric carbon dioxide (CO2) emissions, playing a critical role in greenhouse gas (GHG) budgets. Aquatic vegetation is widely implemented in urban water management for ecological restoration and landscape construction, while its spatial configuration and planting density critically regulate the CO2 flux (FCO2) at the water–air interface. This study examines spatiotemporal variations and environmental drivers of FCO2 across different vegetation patterns in the Qingshangang (QSG) River and Lihu Lake (LH) continuum. The FCO2 exhibited pronounced seasonality, with significantly higher emissions during the wet season (QSG: 74.76 ± 61.95 mmol/m2/d; LH: 62.81 ± 39.08 mmol/m2/d) compared to those during the dry season (QSG: 40.13 ± 44.89 mmol/m2/d; LH: 9.41 ± 15.02 mmol/m2/d). Structural equation model (SEM) identified dissolved oxygen (DO) and pH as key direct controls of FCO2, while dissolved organic matter (DOM) contributed indirectly. Sites with dense emergent macrophytes exhibited significantly higher FCO2 levels, highlighting vegetation density as a primary factor shaping spatial heterogeneity in CO2 emissions. Our findings emphasize the need to consider vegetation spatial distribution in urban aquatic ecosystem design and management for greenhouse gas mitigation strategies.","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 8","pages":"4908–4916"},"PeriodicalIF":4.3,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144807154","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

Impacts of Groundwater Constituents and Colloidal Activated Carbon (CAC) Surface Chemistry on the Adsorption of Perfluoroalkyl Acids (PFAA) in Aqueous Film-Forming Foam (AFFF)-Impacted Groundwater 地下水成分和胶体活性炭（CAC）表面化学对水成膜泡沫（AFFF）影响地下水中全氟烷基酸（PFAA）吸附的影响

IF 4.3

ACS ES&T water Pub Date : 2025-07-24 DOI: 10.1021/acsestwater.5c00236

Rachel A. Molé, Adriana Correia de Velosa, Xitong Liu, Guangbin Li, Dimin Fan, Anthony Danko and Gregory V. Lowry*,

{"title":"Impacts of Groundwater Constituents and Colloidal Activated Carbon (CAC) Surface Chemistry on the Adsorption of Perfluoroalkyl Acids (PFAA) in Aqueous Film-Forming Foam (AFFF)-Impacted Groundwater","authors":"Rachel A. Molé, Adriana Correia de Velosa, Xitong Liu, Guangbin Li, Dimin Fan, Anthony Danko and Gregory V. Lowry*, ","doi":"10.1021/acsestwater.5c00236","DOIUrl":"https://doi.org/10.1021/acsestwater.5c00236","url":null,"abstract":"In situ sequestration of per- and polyfluorinated alkyl substances (PFAS) using colloidal activated carbon (CAC) is a growing technology at aqueous film-forming foam (AFFF)-impacted sites, but its long-term effectiveness remains uncertain due to complex groundwater chemistry. Perfluoroalkyl acid (PFAA) adsorption was quantified in four groundwaters collected from AFFF-impacted sites using two CAC materials. PFAA adsorption was inhibited in each groundwater, with short-chain PFAA (<7 perfluorinated carbons) being more impacted than long-chain PFAA (>7 perfluorinated carbons). Groundwater with high concentrations of total organic carbon (TOC) and diesel-range organics (DRO) caused the greatest decrease in adsorption compared to that of the control system (1 mM NaHCO3, pH = 7.5). Correlation analysis confirmed TOC and DRO were most strongly associated with decreased adsorption performance. Addition of individual groundwater solutes to unimpacted groundwater showed TOC has the strongest impact on long-chain PFAA adsorption while an additive effect was observed for short-chain PFAA. CAC with a high point of zero charge (pHPZC, 9.5) performed better than CAC with a low pHPZC (6.7) in every groundwater due to favorable electrostatic interactions, but this advantage was minimized in groundwater with elevated ionic strength. Scientists and practitioners will benefit from the results presented, which will inform future CAC barrier design and implementation.Diesel-range organics and dissolved organic carbon in AFFF-impacted groundwater have the greatest impact on colloidal activated carbon performance for PFAS adsorption.","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 8","pages":"4541–4551"},"PeriodicalIF":4.3,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsestwater.5c00236","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144807261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microplastics in Aquatic Ecosystems: A Multitiered Framework for Ecological Risk Assessment and Mitigation 水生生态系统中的微塑料：生态风险评估和缓解的多层框架

IF 4.3

ACS ES&T water Pub Date : 2025-07-24 DOI: 10.1021/acsestwater.5c00359

Kamalesh Sen*, and , Sukhendu Dey*,

{"title":"Microplastics in Aquatic Ecosystems: A Multitiered Framework for Ecological Risk Assessment and Mitigation","authors":"Kamalesh Sen*,  and , Sukhendu Dey*, ","doi":"10.1021/acsestwater.5c00359","DOIUrl":"https://doi.org/10.1021/acsestwater.5c00359","url":null,"abstract":"Microplastics (MPs) are pervasive pollutants in aquatic ecosystems, posing significant ecological risks through bioaccumulation, trophic transfer, and toxicity to aquatic organisms. This study presents a multitiered framework for ecological risk assessment (ERA) of MPs, integrating exposure pathways, toxicity mechanisms, and ecosystem-level impacts. The framework employs a combination of statistical, mechanistic, and machine learning (ML)-based modeling approaches to quantify MP distribution, predict their interactions with biotic and abiotic components, and assess long-term ecological consequences. Key factors such as polymer type, particle size, surface chemistry, and environmental conditions are considered to enhance the predictive accuracy of risk assessment models. The study also explores mitigation strategies, including policy interventions, advanced filtration technologies, and bioremediation approaches, to reduce MP contamination and associated risks. By incorporating interdisciplinary methodologies, this framework aims to improve regulatory decision-making and conservation efforts, ensuring sustainable aquatic ecosystem management. The proposed approach offers a comprehensive tool for policymakers, researchers, and environmental managers to evaluate and mitigate MP-induced ecological risks effectively.","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 8","pages":"4322–4342"},"PeriodicalIF":4.3,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144807014","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

Tap vs Bottled: Assessing PFAS Levels and Exposure Risks in Singapore’s Drinking Water 自来水与瓶装：评估新加坡饮用水中的PFAS水平和暴露风险

IF 4.3

ACS ES&T water Pub Date : 2025-07-23 DOI: 10.1021/acsestwater.5c00022

Ke Tian Tan, Ping Shen*, Wei Min Ang, Ignatius Rui Long Lim, Wesley Zongrong Yu, Yuansheng Wu and Sheot Harn Chan,

{"title":"Tap vs Bottled: Assessing PFAS Levels and Exposure Risks in Singapore’s Drinking Water","authors":"Ke Tian Tan, Ping Shen*, Wei Min Ang, Ignatius Rui Long Lim, Wesley Zongrong Yu, Yuansheng Wu and Sheot Harn Chan, ","doi":"10.1021/acsestwater.5c00022","DOIUrl":"https://doi.org/10.1021/acsestwater.5c00022","url":null,"abstract":"Globally, drinking water choices typically involve tap or bottled water, which is influenced by perceptions of quality and safety. Raw water sources are generally considered unsafe due to potential diseases and contaminants. The presence of per- and polyfluoroalkyl substances (PFASs) in drinking water has raised health concerns due to their persistence, toxicity, and potential long-term health impacts. In Singapore, tap water is the primary household drinking source, with bottled water as a supplement. Analysis of both revealed low PFAS levels, indicating minimal health risks. Detected PFAS concentrations ranged from 0.30 to 15.17 ng/L in tap water and from 0.05 to 2.45 ng/L in bottled water, well below the US Environmental Protection Agency limits. The PFAS profile primarily consisted of C4–C9 perfluorocarboxylic acids (PFCAs) and perfluorosulfonic acids, with major contributions from PFCA and short-chain perfluoroalkyl acids (PFAAs) containing 5 or fewer CF2 groups. This study emphasizes the need for advanced technologies to remove short-chain PFASs from drinking water and proposes future research directions to protect public health.","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 8","pages":"4395–4403"},"PeriodicalIF":4.3,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144806867","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

Achievements and Challenges with Equilibrium and Kinetic Passive Sampling of Hydrophobic and Hydrophilic Organic Compounds in Surface Waters 地表水中疏水和亲水有机化合物平衡和动力学被动采样的成就与挑战

IF 4.3

ACS ES&T water Pub Date : 2025-07-23 DOI: 10.1021/acsestwater.5c00384

Kees Booij*, Rachel Mackie, Branislav Vrana, Rainer Lohmann and Sarit L. Kaserzon*,

{"title":"Achievements and Challenges with Equilibrium and Kinetic Passive Sampling of Hydrophobic and Hydrophilic Organic Compounds in Surface Waters","authors":"Kees Booij*, Rachel Mackie, Branislav Vrana, Rainer Lohmann and Sarit L. Kaserzon*, ","doi":"10.1021/acsestwater.5c00384","DOIUrl":"https://doi.org/10.1021/acsestwater.5c00384","url":null,"abstract":"Passive sampling in surface waters is an important method in the monitoring and risk assessment of hydrophobic and hydrophilic organic chemicals. Sampler designs can be optimized for fast equilibrium attainment (equilibrium sampling) or improved time-integrative capability (kinetic sampling). We argue that both equilibrium and kinetic sampling can be applied when aqueous concentrations do not vary with time, whereas kinetic sampling also yields useful results for time-variable concentrations that are often observed with hydrophilic compounds in surface waters. We show that these methods have similar accuracy in principle but that their dominant error sources are different: sampler-water sorption coefficients for equilibrium sampling and sampling rates for kinetic sampling. In contrast to passive sampling of hydrophobic compounds, passive sampling of hydrophilic compounds is not as well-established, but major progress has been made over the past decade in the modeling of transport through the water boundary layer, membrane, and sorbent, while less progress has been made for transport in the biofouling layer. We recommend a more extensive use of diffusion cells as a research tool to gain a better understanding of transport through the respective subphases, leading to a greater maturity of passive water sampling of hydrophilic compounds.","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 8","pages":"4343–4350"},"PeriodicalIF":4.3,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144806928","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 Evidence of the Promotion of Refractory Dissolved Organic Matter through Anthropogenic DOM Inputs to the Fen River, China 人为DOM输入促进汾河难溶有机质的分子证据

IF 4.3

ACS ES&T water Pub Date : 2025-07-23 DOI: 10.1021/acsestwater.5c00465

Chen Gong, Shouliang Huo*, Jingtian Zhang, Hanxiao Zhang and Nanyan Weng,

{"title":"Molecular Evidence of the Promotion of Refractory Dissolved Organic Matter through Anthropogenic DOM Inputs to the Fen River, China","authors":"Chen Gong, Shouliang Huo*, Jingtian Zhang, Hanxiao Zhang and Nanyan Weng, ","doi":"10.1021/acsestwater.5c00465","DOIUrl":"https://doi.org/10.1021/acsestwater.5c00465","url":null,"abstract":"Dissolved organic matter (DOM) represents a critical nexus in the global carbon cycle, with rivers acting as pivotal reservoirs and transporters of terrestrially derived carbon. Anthropogenic nitrogen (N) and sulfur (S) inputs complicate DOM dynamics, altering its bioavailability and persistence, yet the molecular drivers of refractory DOM (RDOM) formation in human-altered river systems remain unresolved. Here, we integrate Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS), 13C stable isotope analysis (δ13CDOC) analysis, and advanced optical characterization to unravel DOM sources and RDOM transformation pathways in the anthropogenically stressed Fen River basin. Longitudinal analyses revealed increasing dissolved organic carbon (DOC) concentrations (2.18–10.37 mg/L), RDOC concentrations (0.07–7.43 mg/L) and S-containing DOM contributions (64.9 ± 4.1% to 69.6 ± 10.1%) along the river continuum, tightly coupled with sewage-derived inputs. S-enriched CHOS compounds emerged as robust molecular markers of RDOM production, dominated by aliphatic structures, hydrophobic units (HUs), and humic acids (HAs). This study deciphers the molecular architecture of DOM persistence in human-impacted rivers, identifying CHOS as both tracers and enablers of RDOM formation. By linking sewage inputs to S-mediated DOM stabilization, these findings provide actionable insights for mitigating legacy organic pollution in freshwater ecosystems under intensifying anthropogenic and climatic pressure.","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 8","pages":"4794–4806"},"PeriodicalIF":4.3,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144806868","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