Science of the Total Environment最新文献

{"title":"Potential mining impacts on ecosystem services and biodiversity on Brazil's quartz and iron mountains","authors":"Kleber F.A. da Silva ,&nbsp;Leila Meyer ,&nbsp;Fernando M. Resende ,&nbsp;Fernando A.O. Silveira ,&nbsp;G. Wilson Fernandes","doi":"10.1016/j.scitotenv.2026.181479","DOIUrl":"10.1016/j.scitotenv.2026.181479","url":null,"abstract":"<div><div>Land use and land cover changes (LULCC) driven by mining expansion result in negative environmental impacts well beyond the mining pit. We assessed the potential impacts of mining and quarrying expansion on ecosystem services (ESs) and biodiversity in the Espinhaço Range, a center of species diversity and endemism that provides water for nearly 50 million people and has been increasingly affected by these activities. We modeled water yield and sediment retention in InVEST using 2022 LULC, climate, and biophysical data. We also evaluated carbon storage and the geographic distribution of threatened vascular plants and terrestrial vertebrates using publicly available datasets. We categorized active mining processes into existing projects (already active or in advanced stages of implementation) and planned projects (those undergoing approval processes). We calculated a ratio by dividing the percentage of ESs and biodiversity within project areas by the percentage of the area occupied by the mining projects in the Espinhaço Range to evaluate whether mining target areas overlap with hotspots of ESs and biodiversity. The 1360 existing areas targeted for mining provide nearly 3-fold more water and more biodiversity relative to their geographic range, while the 2308 areas targeted for future planned projects provide 2-fold more water and 1.44 times more sediment retention than would be expected for their geographic range. More than 56% of existing projects and 46% of planned projects overlap with critical areas for ESs. Additionally, 30 threatened species had more than 30% of their geographic range overlapping with existing and planned mining and quarrying projects. Our results provide evidence that mining projects pose a potential threat and overlap with key areas for both ESs and biodiversity. Therefore, we indicate measures to mitigate the impact of mining and quarrying on ESs and biodiversity in the Espinhaço Range.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"1016 ","pages":"Article 181479"},"PeriodicalIF":8.0,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075921","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}

{"title":"Coupled land–atmosphere processes exacerbate recent compound drought and heatwaves over Africa","authors":"Ibraheem A. Raji ,&nbsp;Akintomide A. Akinsanola ,&nbsp;Thierry N. Taguela","doi":"10.1016/j.scitotenv.2026.181452","DOIUrl":"10.1016/j.scitotenv.2026.181452","url":null,"abstract":"<div><div>Global warming has increased the likelihood of compound drought and heatwave (CDHW) events, posing profound socioeconomic risks globally, with Africa being particularly vulnerable due to its limited adaptive capacity and high exposure to climate extremes. Using ERA5 and NCEP-2 reanalysis datasets for 1980–2024, we analyze recent trends in CDHW occurrences across Africa and diagnose the underlying land–atmosphere drivers. Our results reveal a pronounced hotspot in equatorial Africa, where CDHW frequency has increased by 0.9 events season⁻¹ decade⁻¹, duration by 1.2 days season⁻¹ decade⁻¹, and magnitude by 0.4 °C season⁻¹ decade⁻¹. Change-point analysis reveals two distinct periods: P1 (1980–2003), with a modest increase of 0.4 events season⁻¹ decade⁻¹, and P2 (2005–2024), marked by rapid intensification of 1.1 events season⁻¹ decade⁻¹. The recent intensification is driven primarily by stronger land–atmosphere coupling, with higher potential evaporation due to elevated maximum temperatures and declining soil moisture from reduced precipitation. These drier and warmer surface conditions enhance the concurrent occurrence of drought and heatwaves, amplifying CDHW frequency. Furthermore, we found that the recent warming is attributable largely to increased net downward radiation, modulated by enhanced downward clear-sky longwave radiation, while decreased precipitation is linked to weakening of the vertical dynamic term associated with reduced diabatic heating. In addition, our results show an increased contribution of large-scale climate modes such as the Atlantic meridional oscillation, Indian Ocean Dipole and Pacific Decadal Oscillation to recent CDHW intensification. These findings highlight the critical role of coupled land–atmosphere processes in modulating compound extreme events in Africa.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"1016 ","pages":"Article 181452"},"PeriodicalIF":8.0,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076276","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}

{"title":"Microplastics in small semi-industrial desalination stations and bottled waters: Human exposure and emerging health concerns","authors":"Aziz Ahmad Rigi ,&nbsp;Mehdi Ghayebzadeh ,&nbsp;Hassan Taghipour ,&nbsp;Aram Dokht Khatibi ,&nbsp;Razieh Keikhaee ,&nbsp;Nahid Azizi ,&nbsp;Hosein Kamani ,&nbsp;Laili Mohamadi","doi":"10.1016/j.scitotenv.2026.181378","DOIUrl":"10.1016/j.scitotenv.2026.181378","url":null,"abstract":"<div><div>This study examines the presence of microplastics in bottled water and small semi-industrial desalination stations, which have become increasingly common due to water scarcity and poor quality in the studied region. Despite their widespread use, microplastics in these sources have received limited attention. Sampling was conducted on 234 bottled water samples from 18 different brands and 20 small semi-industrial desalination stations. The samples were analyzed using digestion, filtration, Micro-Raman, and field emission scanning electron microscopy techniques. Results revealed that the abundance of microplastics in bottled water (depending on storage conditions and aging) and small semi-industrial desalination stations ranged between 30 and 402 particles/L and from 88 to 180 particles/L, respectively. Bottled water stored under fluctuating temperatures (especially in sunlight or freezing conditions) showed significantly higher microplastics release due to secondary pollution. Polyethylene terephthalate (40%) was the dominant polymer in bottled water, while polypropylene (33%) prevailed in small semi-industrial desalination stations. The study emphasizes that regular consumption of water from these sources, particularly when bottled water is improperly stored, increases microplastic exposure. Children are especially vulnerable due to a higher intake relative to body weight. These findings underscore the urgent need for improved water resource management and safer storage practices to reduce microplastics contamination and protect public health.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"1016 ","pages":"Article 181378"},"PeriodicalIF":8.0,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076039","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}

{"title":"Illuminating the influence of artificial light at night on the behavior of an adaptable carnivore","authors":"Christopher J. Hickling ,&nbsp;Laurel E.K. Serieys ,&nbsp;Gabriella R.M. Leighton ,&nbsp;Sarah S. Kienle ,&nbsp;Jaqueline M. Bishop ,&nbsp;Kathleen A. Carroll","doi":"10.1016/j.scitotenv.2026.181469","DOIUrl":"10.1016/j.scitotenv.2026.181469","url":null,"abstract":"<div><div>Artificial light at night (ALAN), a pollutant closely linked to urbanization, is rapidly increasing worldwide. ALAN poses growing ecological challenges by altering wildlife movement and habitat use. However, many species have distinct and sometimes flexible behavioral responses to ALAN. Caracals (<em>Caracal caracal</em>) are an adaptable terrestrial carnivore capable of inhabiting urban areas yet are also sensitive to humans. We investigated how ALAN influences caracal movement, habitat selection, and foraging behavior using GPS collars and behavioral data at night. We assessed the role of direct and indirect ALAN, including total upward radiance, public streetlights, and urban skyglow, on adult (<em>n</em> = 17) and subadult (<em>n</em> = 7) caracals of both sexes using integrated step selection functions (iSSFs) to evaluate movement and habitat selection and resource selection functions (RSFs) to examine habitat selection while foraging (i.e., kill sites). We found that caracals avoided direct ALAN, as upward radiance strongly drove movement patterns. Caracals simultaneously selected areas closer to urbanization, and subadults had greater tolerance to ALAN than adults. Additionally, the interplay between urbanization and age class indicates a complex relationship in which ALAN and urbanization both constrain and potentially benefit caracals. We also found that caracal foraging was primarily influenced by direct ALAN via public street lighting, with avoidance of highly illuminated areas. Our findings illustrate that artificial light sources influence distinct yet interconnected behaviors. ALAN is a pollutant that will continue to impact wildlife and therefore disentangling how and where ALAN influences species, and the relative importance of direct and indirect ALAN, can inform mitigation and conservation strategies.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"1016 ","pages":"Article 181469"},"PeriodicalIF":8.0,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076041","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}

{"title":"Greenhouse gas emissions from beaver ponds exceed emissions from shallow lakes in subantarctic ecosystems","authors":"María Victoria Castro ,&nbsp;María Constanza Maluendez Testoni ,&nbsp;Patricia E. García ,&nbsp;Patricia Rodríguez","doi":"10.1016/j.scitotenv.2026.181477","DOIUrl":"10.1016/j.scitotenv.2026.181477","url":null,"abstract":"<div><div>Inland waters are generally perceived as net-sources of greenhouse gases (GHG) to the atmosphere, provided they receive large amounts of terrestrial organic matter, which enhances the production of carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O). Nonetheless, the role of subantarctic brown-water shallow lakes (SLs) and beaver ponds (BPs) in the carbon cycle remains largely unknown. In this study, diffusive GHG emissions of CH₄, CO₂, and N₂O from the air-water interface were measured during two consecutive ice-free periods in four SLs and four BPs from southern Patagonia (Tierra del Fuego, Argentina). Additionally, the CH₄ ebullitive fluxes were measured in two SLs and two BPs during the second sampling season. Results indicate that both water body types are net GHG emission sources; BPs emissions doubled those by brown SLs, both in CO₂ (BPs, 55 ± 22 vs SLs, 26 ± 13 mmol m⁻² d⁻¹) and CH₄ emissions (BPs, 3.8 ± 3.0 vs SLs, 1.1 ± 0.8 mmol m⁻² d⁻¹). N₂O emissions were low in both SLs and BPs (15.2 ± 26 and 11 ± 35 μmol m⁻² d⁻¹, respectively). Furthermore, CH₄ ebullitive fluxes were higher in BPs than SLs (0.9 ± 1.0 and 0.3 ± 0.4 mmol m⁻² d⁻¹, respectively). Our findings provide quantitative data on GHG fluxes between water and the atmosphere in subantarctic lakes and ponds. These results may have significant implications for management practices, since beavers were introduced to the region a few decades ago and BP are currently releasing large volumes of GHG to the atmosphere, yet in smaller amounts than their counterparts in the northern hemisphere, where beavers are native.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"1016 ","pages":"Article 181477"},"PeriodicalIF":8.0,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075956","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}

{"title":"Are green firebreaks a useful fire management tool under climate change in southeastern Australia?","authors":"Erica Marshall ,&nbsp;Kate Parkins ,&nbsp;Elisa Raulings ,&nbsp;Dan Ababei ,&nbsp;Denis Kultaev ,&nbsp;Trent D. Penman","doi":"10.1016/j.scitotenv.2026.181459","DOIUrl":"10.1016/j.scitotenv.2026.181459","url":null,"abstract":"<div><div>Fire management under changing climatic conditions presents several challenges, including the need to manage fire regimes for multiple objectives, such as reducing risk to people while also protecting or maintaining the environment. One approach that could be added to existing management toolkits is green firebreaks. Green firebreaks are strategically placed low flammability plantings aimed at improving habitat and carbon storage while reducing fire risk. However, green firebreaks have not yet been explored in the context of shifting climates. Here, we use spatially explicit fire simulations in a fire regime simulation tool (FROST) to test green firebreak effectiveness under climate change across five landscapes in south-eastern Australia. We simulated fire regimes with and without green firebreaks and in conjunction with prescribed burning in the surrounding landscape. We evaluated effectiveness by examining changes in area burnt, fire frequency, and risk to people, property and the environment. In three out of the five regions, annual area burnt was predicted to increase under future climate trajectories and in most regions the introduction of green firebreaks decreased area burnt in one or both climate epochs but often resulted in increased fire frequency. When both green firebreaks and prescribed burns were used, area burnt, and fire frequency declined in most regions. Results were variable between climate models, reflecting how changes in precipitation and fuel load influenced management effectiveness i.e. prescribed burns and green firebreaks, under future climate predictions. Risks to people and property generally increased slightly with green firebreaks because additional fuel was introduced into the landscape. However, these risks were also negated when prescribed burning was also applied. As a stand-alone fire management method, green firebreaks may not be suitable for every location. However, when used in conjunction with other methods, such as prescribed burning, they could be a viable solution for managing fire and providing co-benefits to the environment.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"1016 ","pages":"Article 181459"},"PeriodicalIF":8.0,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075957","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}

{"title":"Associations between prenatal per- and polyfluoroalkyl substances (PFAS) and repeated measures of bioactive lipids during pregnancy in the LIFECODES cohort","authors":"Ram C. Siwakoti ,&nbsp;Kelly K. Ferguson ,&nbsp;Wei Hao ,&nbsp;David E. Cantonwine ,&nbsp;Bhramar Mukherjee ,&nbsp;Sung Kyun Park ,&nbsp;Lixia Zeng ,&nbsp;Subramaniam Pennathur ,&nbsp;Thomas F. McElrath ,&nbsp;John D. Meeker","doi":"10.1016/j.scitotenv.2026.181465","DOIUrl":"10.1016/j.scitotenv.2026.181465","url":null,"abstract":"<div><h3>Introduction</h3><div>Per- and polyfluoroalkyl substances (PFAS) are a group of synthetic chemicals used in consumer products and industrial applications. Higher prenatal PFAS levels have been linked to adverse pregnancy outcomes, yet underlying biological mechanisms are not well understood, although disruptions in inflammatory processes are suspected.</div></div><div><h3>Objectives</h3><div>Examine associations between prenatal PFAS exposure and maternal bioactive lipid concentrations during pregnancy.</div></div><div><h3>Methods</h3><div>We included 436 participants from the racially and socioeconomically diverse LIFECODES cohort in Boston, Massachusetts. Maternal plasma samples collected in early pregnancy [median gestation = 10 weeks] were analyzed for nine PFAS, while a panel of 55 bioactive lipids, including polyunsaturated fatty acid precursors and their oxylipin derivatives, were assessed in samples collected at up to two gestational time points (median gestation = 9.6 and 26 weeks). We examined associations between individual PFAS and repeated measures of bioactive lipids using generalized estimating equation models, adjusting for maternal demographic, socioeconomic, and study-related factors. We additionally conducted study visit- and fetal sex-stratified analyses.</div></div><div><h3>Results</h3><div>Higher concentrations of certain PFAS were associated with significant changes in bioactive lipid levels, with direction and magnitude varying by specific PFAS, bioactive lipid, and gestational timing. Several PFAS were inversely associated with prostaglandins (PGs), hydroxyeicosatetraenoic acids (HETEs), and oxoeicosatetraenoic acids (oxoETEs) across multiple enzymatic pathways. In contrast, we observed positive associations of several PFAS with leukotriene B4 (LTB4), with an interquartile range (IQR) increase in perfluorooctanoic acid (PFOA) leading to a 14.35% (95% CI: 5.03, 24.5) increase in LTB4 levels. Stratified analysis showed generally stronger associations at the earlier gestational time point than at the later time point, while trends by fetal sex were inconsistent.</div></div><div><h3>Conclusions</h3><div>Prenatal PFAS exposure was associated with alterations in maternal bioactive lipid levels, particularly derivatives of arachidonic acid. These shifts suggest that disruption of arachidonic acid metabolism may be an important pathway through which PFAS may exert their biological effects, warranting further mechanistic investigation.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"1016 ","pages":"Article 181465"},"PeriodicalIF":8.0,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076325","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}

{"title":"Investigating the types of bacterial species with antimicrobial resistance genes in Iran's wastewaters: a systematic review","authors":"Shaghayegh Zafar ,&nbsp;Mahmood Alimohammadi ,&nbsp;Parnia Hatami Moghadam ,&nbsp;Mostafa Hadei","doi":"10.1016/j.scitotenv.2026.181385","DOIUrl":"10.1016/j.scitotenv.2026.181385","url":null,"abstract":"<div><div>Antimicrobial resistance (AMR) is a major global health threat, with wastewater systems performing as critical reservoirs and dissemination pathways for antimicrobial-resistant bacteria (ARB) and resistance genes (ARGs). Despite rising AMR rates in Iran, a comprehensive understanding of resistance patterns in wastewater remains limited. This systematic review aimed to investigate the prevalence, bacterial diversity, and resistance gene profiles in hospital, municipal, and industrial wastewater across Iran. A systematic search was conducted in Scopus, PubMed, Web of Science, and Iranian databases for studies published between 1990 and September 2024. Data extraction followed PRISMA guidelines, and study quality was assessed using the JBI checklist. A total of 43 studies from 13 provinces met the inclusion criteria, with nearly half originating from Tehran (21/43, 48.8%), indicating uneven national coverage. Hospital wastewater (18 studies, 41.9%) harbored the highest burden of clinically significant AMR, including MRSA (22%), VRE (17%), and ESBL-producing <em>E. coli</em> (17%). Municipal wastewater (31 studies, 72.1%) frequently contained VRE <em>Enterococcus faecium</em> (32%) and <em>Enterococcus faecalis</em> (23%), ESBL-producing <em>E. coli</em> (19%), and MRSA (10%). Industrial wastewater (10 studies, 23.3%), primarily from slaughterhouses, exhibited high ESBL rates in <em>E. coli</em> (80%), with some studies reporting up to 93% ESBL production among isolates. Across studies, the most recurrent ARGs were <em>bla</em>_CTX (16.3%), <em>vanA</em> (20.9%), <em>mecA</em> (9.3%), tetracycline genes, and <em>intI1</em>. Detection methods were predominantly culture- and PCR-based, with limited use of qPCR, molecular typing, or metagenomics. The most frequently detected resistance genes included <em>bla</em>_CTX-M, <em>mecA</em>, <em>vanA</em>, <em>tetA</em>, and <em>intI1</em>. Most studies used culture and PCR-based detection; molecular typing and metagenomic approaches were rarely applied. The persistent detection of MDR pathogens and high-priority ARGs highlights significant gaps in AMR surveillance. Strengthening national wastewater monitoring through standardized protocols, broader geographic coverage, and integration of advanced molecular tools is essential to support effective One Health based public-health strategies.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"1016 ","pages":"Article 181385"},"PeriodicalIF":8.0,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076038","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}

{"title":"Field demonstration of portable liquid chromatography - mass spectrometry for per- and polyfluoroalkyl substances detection along the Australian east coast","authors":"Ibraam E. Mikhail ,&nbsp;Andrew Gooley ,&nbsp;Shing Chung Lam ,&nbsp;Matthew Askeland ,&nbsp;Brett Paull","doi":"10.1016/j.scitotenv.2026.181470","DOIUrl":"10.1016/j.scitotenv.2026.181470","url":null,"abstract":"<div><div>This study presents the field demonstration of a portable liquid chromatography-mass spectrometry (LC-MS) solution for rapid on-site detection of selected <em>per</em>- and polyfluoroalkyl substances (PFAS) in soil and sand along Australia's east coast. Pallet-framed in a van, the compact LC-MS system integrates a Versiti chromatograph with a Shimadzu small-footprint autosampler and single quadrupole mass spectrometer. This mobile lab was evaluated over a 3000+ km round trip from Melbourne, Victoria, to Nudgee, Queensland, demonstrating the LC-MS system's portability and robustness under testing field conditions.</div><div>On-site analyses were performed at three industrial locations, Ormeau (QLD), a former fire training ground near Budgewoi (NSW), and a landfill in the Central Coast Council region (NSW), along with analysis of a subset of shoreline samples from Nudgee Beach (QLD), Flynns Beach (NSW), Yarra Bay Beach (NSW), and Altona Beach (VIC). Method detection limits (MDLs) for 10 key PFAS in soil ranged from 1.9 to 7.5 μg/kg. Analysis of a proficiency test soil sample (AQA 22–13) showed an average of &lt;23% deviation from reported and commercial lab values. Moreover, analysis of Budgewoi site samples revealed a substantial correlation between the portable LC-MS system and centralized LC-MS/MS for total PFAS concentrations (<em>r</em> = 0.923, <em>p</em> &lt; 0.0001). Shoreline samples also showed strong agreement, with no false positives in over 40 samples.</div><div>The palleted LC-MS platform ran on a petrol generator, deployed in 20 min, allowed remote troubleshooting, and delivered results for 24 soil samples, including on-site preparation, in 8 h. This study showed that portable LC-MS provides reliable screening for rapid decision-making and timely remediation, preserves centralized lab analysis for regulatory compliance, and transforms the cost-efficiency of field-based environmental monitoring.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"1016 ","pages":"Article 181470"},"PeriodicalIF":8.0,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076273","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}

{"title":"Biomonitoring of an international river: contaminants of emerging concern and biochemical biomarkers in fish","authors":"Tamiris Rosso Storck ,&nbsp;Jaíne Ames ,&nbsp;Silvana Isabel Schneider ,&nbsp;Antônio Cleber da Silva Camargo ,&nbsp;Adriele Tassinari ,&nbsp;Keli Hofstatter ,&nbsp;Edivania Gelati de Batista ,&nbsp;Marlon de Castro Vasconcelos ,&nbsp;Renato Zanella ,&nbsp;Osmar Damian Prestes ,&nbsp;Gustavo Brunetto ,&nbsp;Jaqueline Ineu Golombieski ,&nbsp;Vania Lucia Loro ,&nbsp;Tadeu Luis Tiecher ,&nbsp;Barbara Clasen","doi":"10.1016/j.scitotenv.2026.181431","DOIUrl":"10.1016/j.scitotenv.2026.181431","url":null,"abstract":"<div><div>The aim of this study was to evaluate the presence of contaminants of emerging concern (CEC), such as pesticides, human and veterinary pharmaceuticals, and hormones, in the Uruguay River – southern Brazil, and their possible effects on <em>Astyanax</em> spp. biochemical biomarkers. Three sampling sites were selected: one in the center of the middle Uruguay River, designated SB, and the others upstream (DMC) and downstream (URU) of the central site. Water samples for pesticides and pharmaceuticals analysis were collected monthly for one year. Water samples for physicochemical and microbiological analysis, sediments for pesticide analysis, and fish samples for biochemical biomarker and pesticide bioaccumulation analyses were collected seasonally. 17 pesticides, 13 pharmaceuticals, and 01 hormone were detected in the water samples. 04 pesticides were detected in sediments and 03 in fish muscle. Biochemical biomarkers showed significant differences between collection sites; however, seasonality was the main factor contributing to biomarker responses. Water pH and temperature were the variables with the greatest influence on the biomarkers, followed by the pesticides thiamethoxam, carbendazim, and tebuconazole. Furthermore, the combined analysis of these variables (pH, temperature, thiamethoxam, carbendazim, and tebuconazole) presents a synergistic effect on biomarkers in <em>Astyanax</em> spp. Therefore, the middle Uruguay River is contaminated with different classes of CEC, which, together with natural seasonal fluctuations, can exacerbate adverse effects on the ecosystem. Finally, this study demonstrates the need for shared water management measures among countries with international rivers.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"1016 ","pages":"Article 181431"},"PeriodicalIF":8.0,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076272","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}