Environmental Pollution最新文献

{"title":"Early Springtime O3 Pollution Episode in the Sichuan Basin: Transboundary and Process Analysis","authors":"Jingyi Wang, Xiaoling Zhang, Chuanyang Wang, Jie Pan, Jinhui Gao","doi":"10.1016/j.envpol.2025.126163","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126163","url":null,"abstract":"In the context of climate change, there is a trend of earlier onset and longer duration of ambient ozone (O₃) pollution in the Sichuan Basin (SCB). On 21−26 March 2024, an O₃ exceedance event occurred in the Chengdu Plain and southern SCB during early springtime, when moderate pollution rarely emerged before. The environmental and meteorological observation data, reanalysis dataset, and the WRF-Chem model coupling Integrated Process Rate (IPR) method were employed to examine the synoptic patterns and the transport mechanisms conducive to O₃ pollution episode. The statistical results showed that MDA8 O₃ concentration exceeding 160 μg/m³ amounted to 40 and 63 stations on the 22nd and 23rd in the SCB, respectively. The maximum MDA8 O₃ of 222 μg/m³observed on the 23rd in Zigong located in southern SCB. The synoptic pattern revealed that it was the successive arrival of the southern trough and plateau trough that made the southwestern basin to be controlled by a warm low-pressure system, which consequently led to pollutant accumulation. The strong vertical advection was the reason for the ground-level O₃ surge during the first pollution stage of March 21st to 23rd. Under the influence of northwesterly winds, the O₃-enriched air parcel was subsequently conveyed downstream to southern SCB, with the elevated local temperature exacerbating the O₃ formation. The contribution of horizontal advection was ∼9.03 times higher than the chemical contribution in the southern SCB. During the pollution's later stage, increased wind speed and presence of precipitation were crucial for the enhanced vertical mixing, which ultimately leaded to the O₃ decrease. Our result advances early spring O₃ pollution mechanism and their interactions with distinctive topographic and meteorological conditions over the SCB.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"31 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Changing tropospheric NO2 dynamics across Indian air pollution hotspots","authors":"Akash Biswal, Varun Katoch, Tanbir Singh, Khaiwal Ravindra, Vikas Singh, Suman Mor","doi":"10.1016/j.envpol.2025.126160","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126160","url":null,"abstract":"The National Clean Air Programme (NCAP) of India launched in 2019, aims to significantly reduce air pollution in its major hotspots, placing major attention on particulate matter. However, Nitrogen dioxide (NO₂) a criteria pollutant, also needs attention due to its role in secondary aerosol formation and associated adverse health impacts. Considering this, the current study examines the continuously changing tropospheric vertical column density (VCD) NO₂ trends (2005-2023) over 131 polluted cities (non-attainment cities). Based on geographic locations, these cities were categorized into different zones, and their co-located Ozone Monitoring Instrument (OMI) based tropospheric VCD NO₂ trends (yearly, seasonal) were studied. Tropospheric VCD NO₂ over all the zones shows a statistically significant increasing trend (linear regression) with an annual increase of 1 - 4 × 10¹³ molecules cm^-2y^-1. Seasonal-trend decomposition using LOESS (STL) trend component analyzed with linear regression and Mann–Kendall test also showed a similar statistically significant increasing trend in almost all zones across India. However, from 2017-2023, tropospheric NO₂ across all zones of India except the Northeast (NEAST) showed a declining trend. The highest decline was over Indo-Gangetic Plain (IGP) of around 7 × 10¹³ molecules cm^-2y^-1 but found statistically significant only with the Mann-Kendall test. Moreover, there has been an average reduction of 1.9% per year in tropospheric VCD NO₂ over non-attainments cities since 2017 which can be linked to the implementation of upgraded vehicular exhaust standards (Bharat Stage VI), electric vehicle popularisation, NCAP, and strict regulatory implementations. Interestingly, the average VCD NO₂ in 2023 has reached similar levels to the COVID-19 lockdown year. While understanding the factors influencing the trend of tropospheric VCD NO₂, the feature importance of random forest methods shows that factors vary in zones and trends are influenced by month, meteorological factors, and forest fires in different zones across India.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"25 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Huge challenges of improving ozone pollution in China: high regional background ozone concentrations calculated from observational data","authors":"Yusi Liu, Yang Zhang, Fan Yang, Linlin Liang, Guiqian Tang","doi":"10.1016/j.envpol.2025.126162","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126162","url":null,"abstract":"Understanding current regional background ozone concentrations can clarify their ability to meet air quality standards. In this study, the regional background ozone concentration was defined as the stable concentration of ozone caused by large-scale winds. Therefore, on the basis of an experimental equation, the national regional background ozone concentration was calculated via national hourly ozone concentration and wind speed observational data from 2015 to 2023. This study divided China into five regions according to the spatial distributions of climatic zones and regional background ozone concentrations. The regional background ozone concentration in China was low in the northeast (77.3 ± 5.7 μg/m³) and southeast monsoon (79.3 ± 5.2 μg/m³) regions and high in the southwest monsoon region (94.5 ± 8.0 μg/m³) and northern region (95.3 ± 7.1 μg/m³). The regional background concentration of the plateau region was considered high at the national level (99.6 ± 4.8 μg/m³). This study highlights that the regional background ozone concentration in plains is related to soil NOx, and that that in plateaus is related to altitude (stratospheric intrusion and strong radiation). Cross-border transport from Southeast Asia contributed significantly to regional background ozone in Southwest China. Given the differences in regional background ozone concentrations, the ability to meet national air quality standards varies across regions. The plateau, northern, and southwest monsoon regions presented high regional background ozone concentrations, which indicates that these regions are under great pressure to reduce emissions.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"13 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Epidemiological and genomic insights of mcr-1-positive colistin-resistant Klebsiella pneumoniae species complex strains from wastewater treatment plants in Shanghai","authors":"Min Jia, Jing Zhang, Jun Feng, Yuan Zhuang, Zhen Xu, Lingyue Yuan, Jiayuan Luo, Liang Hong, Jiahui Xia, Huanyu Wu, Xin Chen, Min Chen","doi":"10.1016/j.envpol.2025.126146","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126146","url":null,"abstract":"The emergence of <em>mcr-1</em>-positive <em>Klebsiella pneumoniae</em> species complex (MP-KpSC) poses a significant threat to public health due to its resistance to last-resort antibiotics like colistin. This study aimed to investigate the prevalence, genomic characteristics, and transmission features of MP-KpSC in wastewater treatment plants (WWTPs) in Shanghai, China. A total of 13 (0.36%) MP-KpSC isolates were identified, including 12 <em>K. pneumoniae</em> and 1 <em>K. quasipneumoniae subsp. similipneumoniae</em> (Kqps). Nine multidrug-resistant (MDR) MP-KpSC and 3 extensively drug-resistant (XDR) MP-KpSC strains were identified. Twenty-two resistance determinants were present in over 30% of the strains, with the most prevalent being <em>mcr-1</em> (100%), <em>floR</em> (84.62%), <em>mphA</em> (69.23%), and <em>tet(A)</em> (69.23%). MP-KpSC exhibited 11 sequence types, 4 plasmid types, 6 <em>mcr-1</em>-flanked regions, 4 clonal groups, and diverse serotypes. In 53.85% of strains, transposons were identified within the <em>mcr-1</em>-flanked regions. One strain contained both <em>mcr-8.2</em> and <em>mcr-1</em> gene. Notably, the <em>mcr-1</em> gene was identified for the first time in Kqps and was located on the conjugative IncP1 plasmid, with <em>ISApl1</em> elements upstream of it. Worryingly, two carbapenem- and colistin-resistant XDR MP-KpSC stains, and three possible hypervirulence (hv) were found in MDR MP-KpSC strains. Moreover, multiple virulence genes and <em>mcr-1</em>, on the same contig with IS679 insert element. The evolutionary trajectories of these strains among WWTPs-clinical-animals were revealed in Shanghai. The study highlights the environmental reservoir of MP-KpSC in WWTPs and the potential risk of XDR and hv MP-KpSC transmission to humans and aquatic animals, and underscores the importance of active surveillance in WWTPs to curb the spread of MP-KpSC.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"183 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Tracing emerging contaminants from the Baltic Sea and North Sea in fjord waters in southern Norway with rare earth elements as far-field tracers","authors":"Anna-Lena Zocher, Tomasz Maciej Ciesielski, Stefania Piarulli, Julia Farkas, Michael Bau","doi":"10.1016/j.envpol.2025.126124","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126124","url":null,"abstract":"Knowledge of geogenic and anthropogenic rare earth elements and yttrium (REY) in fjords in Norway and elsewhere is still limited despite the importance of fjords for biodiversity and economy and the known ecotoxicity of the REY. We provide complete sets of REY data for fjord waters and a river in southern Norway and for several stations along the coasts of Denmark and Sweden, which characterise Baltic Sea outflow water.Shallow fjord waters show high REY concentrations and shale-normalised (_SN) patterns that resemble those of the river water input. Deeper waters show lower concentrations, seawater-like REY_SN patterns, and the Pr_SN/Tb_SN ratios (≥ 0.5) typical of fjord waters. Some of the samples show elevated Gd/Tb ratios and distinct positive Gd anomalies, revealing the presence of anthropogenic Gd originating from constrast agents used in magnetic resonance imaging (MRI).We emphasise that <em>all</em> water samples from the Baltic Sea outflow taken over a twelve months period show large positive Gd anomalies, suggesting permanent input of anthropogenic Gd from the Baltic Sea into the Skagerrak. Combined with literature data, our results suggest that the anthropogenic Gd in the fjords of southern Norway is not derived from local sources. It rather originates from the Baltic Sea and southern North Sea and is transported northward by currents along the coasts of Sweden, Denmark and Germany. If application of Gd-based contrast agents in MRI continues to increase, this signal will get stronger in the future and be transported even further north.Overall, our data for geogenic REY and anthropogenic Gd in fjord and bay waters from southern Norway and in the Baltic Sea outflow show that local hydrography exerts an important control on the concentration and distribution of trace elements which may be (micro)nutrients and/or (micro)pollutants in fjords and needs to be considered in environmental impact studies.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"36 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Factors Influencing the Vertical Distribution and Transport of Plastics in Riverine Environments: Theoretical Background and Implications for Improved Field Study Design","authors":"Jenna Brooks, Julia Hopkins","doi":"10.1016/j.envpol.2025.126151","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126151","url":null,"abstract":"Rivers have been widely recognized as important conduits and accumulation sites for plastics. Accurately describing plastic fate and transport in these systems is essential for the development of numerical models, estimating loads to oceans, and implementing effective management strategies. However, plastic transport mechanisms within fluvial environments are not well understood, and field studies often do not provide sufficient information to test analytical models of transport. Sediment transport has dynamical similarities to plastics transport in water bodies, enough to warrant further investigation into how principles from sediment transport can be used to guide the study of plastics. In this review, we summarize fundamentals from sediment transport research and their application to plastics, then use these to make suggestions of clarifying research questions and riverine field study design with the goal of generating more insightful data that can be used to understand and predict plastic fate and transport. We focus specifically on factors influencing plastic vertical distribution and movement in the water column, as variations in this direction have historically been overlooked or oversimplified in rivers.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"132 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Uncovering the Partitioning, Transport Flux and Socioeconomic Factors of Organophosphate Esters in an Urban Estuary of Eastern China","authors":"Ya Yang, Lai Wei, Rui Wang, Guohua Zhao, Shouye Yang, Haifeng Cheng, Hualin Wu, Qinghui Huang","doi":"10.1016/j.envpol.2025.126132","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126132","url":null,"abstract":"The Yangtze River Estuary is considered as a critical transition zone for terrestrial organophosphate esters (OPEs) transported to the open sea, yet their environmental behavior and influencing drivers remain inadequately investigated. Here, we examine the occurrence of eleven OPEs across water, suspended particulate matter (SPM), and sediment, which reveals moderate pollution levels compared to other Chinese estuaries. The OPE partitioning processes are dependent on compound-specific partition coefficients (LogK_d), hydraulic factors, and terrestrial input. Compounds with lower logK_ow remain mostly dissolved or particulate-bound, whereas higher logK_ow OPEs tend to be deposited in sediment. Riverine input and output emerge as the dominant transport pathways for OPEs within the YRE, with an annual input flux of 677 tons. Modeling reveals that tris(1-chloro-2-propyl) phosphate (TCIPP), tris(2-chloroethyl) phosphate (TCEP), and triethyl phosphate (TEP) face significant resuspension risks, indicating their increased transport into the open sea, while tris(2-ethylhexyl) phosphate (TEHP) presents a remarkable sedimentary risk due to its high hydrophobicity. The results suggest that the YRE functions as a source for resuspension-prone compounds and a sink for sediment-bound OPEs, demonstrating their distinct environmental fates. Additionally, aggravating pollution of OPEs has been observed in the Pearl River, Yellow River, and Yangtze River Estuaries with sustained wastewater discharge and rapid urbanization. This study provides an overview of the partitioning processes, transport mechanisms, and anthropogenic threats, thus underlining the need for effective pollution mitigation to protect estuarine ecosystems and promote sustainable water management.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"36 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Unraveling the Impact of Micro- and Nano-sized Polymethyl methacrylate on Gut Microbiota and Liver Lipid Metabolism: Insights from Oral Exposure Studies","authors":"Peng Chen Zheng, Xin Qiang Pan, Yi Jiong Zhou, Keng Po Lai, Rong Li, Xiao Xi Zhang","doi":"10.1016/j.envpol.2025.126157","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126157","url":null,"abstract":"Microplastics, particularly polymethyl methacrylate (PMMA), have emerged as significant environmental pollutants, with growing concerns about their impact on various biological processes. However, the effects of chronic PMMA exposure on hepatic lipid metabolism remain insufficiently studied. This research aimed to examine the consequences of chronic exposure to PMMA particles of different sizes (100 nm and 2 μm) on hepatic lipid metabolism in mice. Female C57BL/6J mice were administered PMMA particles in drinking water over an 8-week period, and the effects on intestinal and liver morphology and function were evaluated. Histopathological analyses, gut microbiota profiling, and serum and liver assays were conducted to assess oxidative stress, lipid metabolism-related biomarkers, and liver metabolomics. The results revealed that PMMA particles accumulated in both the liver and colon, causing liver injury characterized by elevated ALT and AST levels. The exposure also induced oxidative stress by inhibiting the NRF2/HO-1 signaling pathway. Furthermore, PMMA exposure resulted in significant alterations to the gut microbiota and hepatic metabolism. These changes were linked to increased microbial diversity, which impacted cholesterol metabolism through the gut-liver axis. Additionally, the activation of the PI3K/AKT/PPARγ signaling pathway disrupted hepatic lipid metabolism, leading to increased cholesterol synthesis and hepatic lipid accumulation. This study underscores the potential of PMMA to disrupt both hepatic lipid metabolism and gut microbiota composition, suggesting a novel mechanism by which PMMA exposure could contribute to metabolic disorders and liver disease.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"37 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Distribution Characteristics of Volatile Organic Compounds and Its Multidimensional Impact on Ozone Formation in Arid Regions Based on Machine Learning Algorithms","authors":"GuangYao Shi, HuiHui Du, LingTong Du, XiLu Ni, Yang Hu, DanBo Pang, LiangJin Yao","doi":"10.1016/j.envpol.2025.126159","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126159","url":null,"abstract":"Volatile Organic Compounds (VOCs) are key components of atmospheric pollution and play a critical role in ozone (O₃) formation. Understanding their distribution and pollution sources is essential to grasping the multifaceted impact of VOCs on O₃ production. This study, conducted at the Yinchuan Urban Ecosystem Research Station, carried out simultaneous field observations to collect data on VOCs, meteorological factors, and O₃. Machine learning algorithms were employed to analyze the sources of VOCs pollution and evaluate their impact on O₃ formation. Results show that the monthly average volume fraction of total VOCs was 29.28×10^-9, with alkanes dominating, accounting for 51.1% of total VOCs during summer at high altitudes. Ethane (3.55×10^-9), n-hexane (3.36×10^-9), and propane (2.85×10^-9) were identified as key components. Artificial source contributed 78.6% of VOCs emissions in summer, with hydrocarbon volatile emission source (31.6%) and vehicle emission source (30.1%) being the major sources, while natural emissions accounted for only 21.4%. VOCs exhibited a notable negative impact on O₃ levels, reflected by a total effect value of -0.29. Among the VOCs components, aromatics, halocarbons, and alkanes were identified as the primary contributors to O₃ dynamics, with respective effect values of 0.84, 0.75, and 0.71, and their contribution rates were quantified as 21.8%, 19.4%, and 18.4%, respectively. Among meteorological factors, temperature was a key determinant of O₃ levels, with a significant positive effect (effect value of 0.58). Temperature, wind speed, and relative humidity primarily influenced O₃ through direct effects, while photosynthetically active radiation indirectly influenced O₃ by affecting VOCs. The findings of this study link pollution sources, meteorological factors, and air quality management. Through systematic multidimensional analysis, it offers deeper insights into the complex relationships between meteorological factors, VOCs, and O₃ in high-altitude areas. These insights provide a scientific basis for formulating precise, region-specific, and component-targeted air pollution control measures.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"48 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Characterization and Risk-quantification of Antibiotic Resistome in Grain-based and Non-grain Cropping Soils","authors":"Jingpeng Li, Lin Zhu, Xiaodi Li, Xuezhu Han, Jiaming Yi, Ying Wu, Meizhen Wang","doi":"10.1016/j.envpol.2025.126147","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126147","url":null,"abstract":"Microbial contamination in soils, encompassing human bacterial pathogens (HBPs), antibiotic resistance genes (ARGs), and virulence factor genes (VFGs), poses a significant threat to human health via the food chain. Currently, there is a lack of comprehensive assessments of microbial contamination and associated health risks of ARGs in agricultural soils. In this study, metagenomic sequencing was used to evaluate microbial contamination in grain-based cropping soils (rice cultivation) and non-grain cropping soils (vegetable cultivation and aquaculture). The results showed that the diversity and abundance of HBPs and VFGs were significantly higher in non-grain soils. Further resistome analysis revealed higher abundances of high-risk (from 0.014 to 0.018 - 0.023) and “last-resort” ARGs (from 0.007 to 0.034 - 0.046) in non-grain soils. Besides ARGs abundance, health risk quantification revealed that non-grain soils exhibited 1.49 to 2.14-fold greater ARG-related risks than grain-based soils. Additionally, stronger network associations were found between HBPs, ARGs, and mobile genetic elements (MGEs) in non-grain soils. This study indicated that the non-grain cropping pattern of soils elevated the risk of microbial contamination and ARGs health risk, which provided an important basis for accurately quantifying the risk of microbial contamination in different agricultural soils.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"35 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}