Chemosphere最新文献

{"title":"Determinants of mercury accumulation and risk for Pacific blue mussels (Mytilus trossulus) sampled along a gradient of glacial coverage","authors":"Benjamin D. Barst ,&nbsp;Jordan Jenckes ,&nbsp;Kyle A. Capistrant-Fossa ,&nbsp;Katrin Iken ,&nbsp;Drew Porter ,&nbsp;Michelle Trifari ,&nbsp;Erin J. Ussery ,&nbsp;Kristin Nielsen","doi":"10.1016/j.chemosphere.2026.144868","DOIUrl":"10.1016/j.chemosphere.2026.144868","url":null,"abstract":"<div><div>Climate change is causing rapid glacial retreat, which may affect the concentrations of trace elements in glacial outflow entering marine environments. Mercury is a trace element of interest because it bioaccumulates and poses risks to animal and human health. Although past studies have documented elevated concentrations of mercury in glacial outflow in Alaska and other regions of the world, studies assessing the fate of glacially derived mercury are lacking. We sampled Pacific blue mussels from 10 watersheds spanning a gradient of glacial influence in two regions of coastal Alaska (Kachemak Bay and Lynn Canal). We analyzed total mercury concentrations in mussel samples and investigated the factors driving these concentrations. Our results demonstrate that total mercury concentrations are tightly correlated with glacial watershed coverage in the Kachemak Bay region, but not the Lynn Canal region where some water quality parameters were more important determinants of mussel total mercury. Glacial scouring of bedrock is an important source of particulate-bound mercury in both regions, however the homogenous bedrock geology across the Kachemak Bay study area may have allowed us to better isolate the influence of glacial coverage on mussel total mercury compared to the Lynn Canal study area, where more heterogeneous bedrock likely introduces greater variability in mercury levels among proglacial streams. The proportion of Kachemak Bay mussels with mercury concentrations above the Alaska average increased with glacial coverage, though the mussel mercury concentrations from all sites do not pose risks for human or animal consumers.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"397 ","pages":"Article 144868"},"PeriodicalIF":8.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147319194","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":"Mutagenesis of PM2.5 water-bioavailable fraction in reference area for atmospheric pollution","authors":"Cristiane Silva da Silva ,&nbsp;Vera Maria Ferrão Vargas","doi":"10.1016/j.chemosphere.2026.144848","DOIUrl":"10.1016/j.chemosphere.2026.144848","url":null,"abstract":"<div><div>Airborne particulate matter (PM) is a pollutant composed of organic and inorganic suspended compounds. Fine inhalable particles (PM2.5) are associated with adverse effects on human health. Organic compounds are most evaluated for genotoxicity, however inorganics adsorbed to PM2.5 can also generate these effects. The study aimed to evaluate whether the fraction of water-soluble inorganic compounds intensifies the mutagenic response compared to those already observed in organic extracts analyzed in an area of reference for air pollution in southern Brazil. Air filters were submitted to aqueous extraction to evaluate PM2.5 inorganic compounds, especially metals, in the water-soluble fraction (WSF). Chemical analysis was performed to quantify metals. Mutagenicity was evaluated using the <em>Salmonella</em>/microsome assay (microsuspension) with strains TA97a, TA98 and TA102, in the presence and absence of rat liver metabolization fraction (±S9). Al, Zn and Cu were found in the largest quantity in the samples, although not indicating elevated mutagenic activity. Most mutagenesis results were positive for the strains and conditions tested, and TA102 was the most sensitive. Comparing the results of mutagenesis among organic (observed in previously studies) and inorganic extract samples for TA98(±S9), the highest responses were detected in the WSF extracts. Therefore, positive responses of WSF elevated the mutagenicity found for the organic fraction of PM2.5, evidencing a sum total of effect as against the different strains tested. According to results the area is no longer a reference for airborne pollution by PM2.5.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"396 ","pages":"Article 144848"},"PeriodicalIF":8.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146159579","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":"Corrigendum to “Unraveling the composition and succession of the microbial community in aerobic granular sludge treating urban wastewater with high load from hospital effluent” [Chemosphere 381 (2025) 144483]","authors":"Aurora Rosa-Masegosa ,&nbsp;Ramiro Vilchez-Vargas ,&nbsp;Susanna Gorrasi ,&nbsp;Antonio Monteoliva-García ,&nbsp;Alejandro Gonzalez-Martinez ,&nbsp;Jesus Gonzalez-Lopez ,&nbsp;Barbara Muñoz-Palazon","doi":"10.1016/j.chemosphere.2026.144866","DOIUrl":"10.1016/j.chemosphere.2026.144866","url":null,"abstract":"","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"397 ","pages":"Article 144866"},"PeriodicalIF":8.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146215465","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":"Swimming impairment caused by pharmaceuticals in native and invasive fishes: A comparison of fluoxetine effects in two poeciliid species","authors":"Martina Kolesnik ,&nbsp;Ismael Lozano ,&nbsp;Juan S. Guidobono ,&nbsp;Fabiana L. Lo Nostro ,&nbsp;Fernando J. Meijide","doi":"10.1016/j.chemosphere.2026.144860","DOIUrl":"10.1016/j.chemosphere.2026.144860","url":null,"abstract":"<div><div>Chemical pollution and invasive alien species are currently recognized as two of the major drivers of global biodiversity loss. These two pressures rarely act in isolation, but instead frequently co-occur and interact in human-modified ecosystems. The antidepressant fluoxetine (FLX) is among the neuroactive pharmaceuticals most regularly detected in watersheds worldwide, raising concerns over its potential adverse effects on the behavior of fishes and other aquatic organisms. For native fish species inhabiting FLX-polluted environments, the ability to withstand the ecological pressure from invasive species might be compromised if they prove more vulnerable to chemical pollution than their non-native counterparts. Here, we examined whether FLX impairs swimming performance at lower concentrations in the native ten-spotted livebearer <em>Cnesterodon decemmaculatus</em> than in the invasive mosquitofish <em>Gambusia holbrooki</em>. Fishes were exposed to waterborne FLX for 14 days, under semi-static conditions with daily renewal of test solutions. Following exposure, swimming activity of individual fish was video-recorded and analyzed. We found that fish exposed to 25 μg/L FLX exhibited impaired swimming behaviour, slowing down their movement and remaining for longer time static and close to the surface. Contrarily, exposure to 0.5 μg/L FLX–an environmentally relevant concentration–did not affect swimming performance in either species. Interestingly, exposure to 5 μg/L FLX, which is close to the concentration of combined antidepressants reported in surface waters, had a significant effect on overall locomotion in <em>C. decemmaculatus</em> but not in <em>G. holbrooki</em>. This finding points to a higher susceptibility of the native species as compared to the invasive one, potentially diminishing its capacity to cope with interference competition under aquatic pollution by neuroactive contaminants.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"396 ","pages":"Article 144860"},"PeriodicalIF":8.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171281","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":"Co-occurrence of ionophore polyether antibiotics and pesticides in peri-urban horticultural streams: multi-matrix monitoring, partitioning, and risk assessment","authors":"M. Navarro ,&nbsp;T.M. Mac Loughlin ,&nbsp;L.L. Alonso ,&nbsp;M. Ramos ,&nbsp;K. Miglioranza ,&nbsp;C. Apartin","doi":"10.1016/j.chemosphere.2026.144861","DOIUrl":"10.1016/j.chemosphere.2026.144861","url":null,"abstract":"<div><div>Intensive horticulture and the reuse of poultry litter (PL) can introduce mixtures of pesticides and veterinary pharmaceuticals into adjacent waters. A multi-matrix study was conducted at eight stream sites in the Cinturón Hortícola Platense (Argentina) across three sampling campaigns. Surface water, suspended particulate matter (SPM), bottom sediments, and aquatic macrophytes were analyzed by LC-MS/MS. Target compounds included ionophore polyether antibiotics (IPAs), selected pesticides, avermectins and the fluoroquinolone enrofloxacin. Monensin was the most frequently detected IPA. Glyphosate and its metabolite AMPA were ubiquitous across matrices, while chlorpyrifos and its metabolite TCP were widespread in water and sediments. Prometryn and tebuconazole were consistently observed across campaigns, whereas avermectins and enrofloxacin were not detected. Macrophytes accumulated several target compounds, supporting their role as integrators of contamination. Pseudo-partition coefficients (water-sediment, water-SPM) indicated a preferential association of monensin, glyphosate, and AMPA with solid phases. Principal component analysis linked monensin with organic-matter and nutrient proxies, consistent with PL-driven runoff. A screening environmental risk assessment indicated very high risk for chlorpyrifos in water and sediment, and low risk for IPAs at observed levels. Findings highlight the complex contamination arising from horticultural practices that combine animal-derived soil amendments with pesticide applications. Sampling strategies should include transformation products and macrophyte biomonitoring, as aquatic plants can indicate agricultural contamination. The results provide actionable evidence to guide monitoring and mitigation efforts in peri-urban horticulture, emphasizing the importance of vegetated buffers, improved PL handling, and comprehensive surveillance that includes metabolites.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"396 ","pages":"Article 144861"},"PeriodicalIF":8.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146168517","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":"Occurrence of legacy, emerging, and novel brominated and chlorinated flame retardants in eggs of Black Stork (Ciconia nigra) from Eastern Europe","authors":"Dzintars Zacs ,&nbsp;Maris Strazds ,&nbsp;Ingus Perkons ,&nbsp;Vadims Bartkevics","doi":"10.1016/j.chemosphere.2026.144885","DOIUrl":"10.1016/j.chemosphere.2026.144885","url":null,"abstract":"<div><div>This study presented the occurrence of halogenated flame retardants (HFRs) in the eggs of the Black Stork (<em>Ciconia nigra</em>). Sixty egg samples were analyzed for the presence of polybrominated diphenyl ethers (PBDEs), hexabromocyclododecanes (HBCDDs), emerging brominated flame retardants (EBFRs) and dechlorane-related compounds (DRCs). The total selected HFR concentrations (∑_HFRs) in analyzed samples ranged from 1.04 to 44.5 ng g⁻¹ wet weight (w.w.), reaching mean and median values of 7.76 and 4.03 ng g⁻¹ w.w., respectively. The median contributions of PBDEs, DRCs, and HBCDDs to the total HFR composition were similar, making up approximately 25% to 40% of the total ∑_HFR profile, whereas EBFRs represented the minor category among the selected HFRs. The ratio between different HFR group profiles and contributions to the total HFR burden in the whole set of samples varied significantly, indicating different contamination sources or environmental behaviors. The observed HFR concentrations in Black Stork eggs were comparable to those found in White Stork (<em>Ciconia ciconia</em>) eggs from other regions of Europe. Statistical treatment of the datasets didn't reveal any correlations between the biological parameters of the analyzed eggs and levels of selected organohalogens.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"397 ","pages":"Article 144885"},"PeriodicalIF":8.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147313130","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":"Identification of tire and road wear particles in artificial water bodies in Japan","authors":"Kimleng Keang,&nbsp;Shuo Cheng,&nbsp;Snehal Wasnik,&nbsp;Haoge Zhang,&nbsp;Jeffrey S. Cross","doi":"10.1016/j.chemosphere.2026.144869","DOIUrl":"10.1016/j.chemosphere.2026.144869","url":null,"abstract":"<div><div>Tire and road wear particles (TRWPs) are a major source of microplastic pollution in urban environments. While research has largely focused on natural aquatic systems, artificial urban water bodies in Japan remain understudied despite their high potential to accumulate these pollutants. This study provides a detailed evaluation of TRWPs in artificial water bodies across four major regions (Kinki, Chukyo, Kitakyushu/Fukuoka, and Sapporo) in Japan using microscopy, SEM-EDX, and Raman spectroscopy. TRWPs were characterized by distinctive morphologies, elemental signatures (Zn, S, Si, and C), and Raman spectral features, including carbon black and styrene-butadiene rubber (SBR) markers. Quantitative analysis revealed spatial variability, with TRWP concentrations ranging from 291.2 to 489.9 particles/L. The highest abundance was recorded in Sorakuen (489.9 particles/L), while the lowest was observed in Tsurami (291.2 particles/L). Raman spectra from sites like Tsuruma (Nagoya) and Maizuru (Fukuoka) indicated the presence of fresher TRWPs, whereas particles from Shonai (Nagoya) and Maruyama (Kyoto) exhibited signs of advanced weathering. SEM imaging further supported these findings, highlighting extensive surface degradation particularly in high-traffic locations. These artificial systems function both as semi-enclosed ecological habitats and as potential accumulation zones for TRWPs, where prolonged retention promotes particle buildup and transformation. While the findings indicate that such environments can retain substantial TRWP loads, further comparative research is needed to evaluate their relative role within broader urban aquatic systems.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"397 ","pages":"Article 144869"},"PeriodicalIF":8.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146260390","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":"Corrigendum to ‘Modelling and parameter estimation of diethyl phthalate partitioning behaviour on glass and aluminum surfaces’ [Chemosphere 285 (2021) 131414]","authors":"Simoní Da Ros ,&nbsp;Katherine Curran","doi":"10.1016/j.chemosphere.2026.144843","DOIUrl":"10.1016/j.chemosphere.2026.144843","url":null,"abstract":"","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"396 ","pages":"Article 144843"},"PeriodicalIF":8.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146159552","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":"Contamination of an Afro-tropical river with nicotine from tobacco farming and its implications for ecological and human health","authors":"Emmanuel Cishibanji ,&nbsp;Elias Chirwa ,&nbsp;Rodgers Makwinja ,&nbsp;Benjamin N. Kondowe ,&nbsp;Sébastien Baekelandt ,&nbsp;Fabrice Muvundja ,&nbsp;Godwell Nhamo ,&nbsp;Bossissi Nkuba","doi":"10.1016/j.chemosphere.2026.144876","DOIUrl":"10.1016/j.chemosphere.2026.144876","url":null,"abstract":"<div><div>Tobacco cultivation is associated with ecological and human health risks due to nicotine, an emerging aquatic contaminant. In tobacco-growing areas, nicotine can enter aquatic ecosystems through plant secretions and tobacco stalks used as organic fertilizer. Using a modified QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) extraction method and liquid chromatography-tandem mass spectrometry (LC-MS/MS), this study aimed to <em>(i)</em> quantify nicotine residues in the Bua River, which flows through a central tobacco-growing region in Malawi – the country with the highest proportion of arable land dedicated to tobacco farming globally – and <em>(ii)</em> assess ecological risks in water and sediment, as well as potential human health risks from contaminated fish. The highest geometric mean concentrations were detected in fish tissues, particularly <em>Clarias gariepinus</em> (10.29 ± 2.09 μg/kg) compared to <em>Oreochromis shiranus</em> (1.35 ± 6.79 μg/kg), sediment (0.93 ± 3.54 μg/kg), and surface water (0.67 ± 1.96 μg/L). Nicotine levels were associated with several water quality parameters. Findings revealed that nicotine residues occur at ecologically concerning levels, posing high ecological risks to freshwater invertebrates and fish populations. Although nicotine levels in fish muscle do not currently pose human health risks under prevailing consumption rates, cumulative exposure from tobacco farming activities may elevate risks. This study provides evidence of substantial ecological risks that may disrupt trophic balances and alter aquatic communities. It recommends regular monitoring to assess long-term impacts, enable timely ecological responses, and minimize cumulative risks.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"397 ","pages":"Article 144876"},"PeriodicalIF":8.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146260396","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":"Adaptive learning rate optimization in deep recurrent architectures for precision PM2.5 forecasting under climate variability","authors":"Caner Erden","doi":"10.1016/j.chemosphere.2026.144875","DOIUrl":"10.1016/j.chemosphere.2026.144875","url":null,"abstract":"<div><div>Accurate forecasting of fine particulate matter (PM_{2.5}) is critical for safeguarding public health; however, conventional deep learning models frequently encounter convergence instability when exposed to highly volatile meteorological inputs. This study evaluates advanced learning rate scheduling strategies to improve long short-term memory (LSTM) and gated recurrent unit (GRU) performance using Atlanta's 2023–2025 air quality and meteorological data. The research compares polynomial, piecewise constant, and cosine decay schedules, revealing architecture-specific sensitivities: the analysis identifies that LSTM achieved optimal stability with piecewise constant decay (MAE = 0.9255 <span><math><mrow><mi>μ</mi><mi>g</mi><mo>/</mo><msup><mi>m</mi><mn>3</mn></msup></mrow></math></span>), whereas GRU performed best under polynomial decay (MAE = 1.1092 <span><math><mrow><mi>μ</mi><mi>g</mi><mo>/</mo><msup><mi>m</mi><mn>3</mn></msup></mrow></math></span>). Although Cosine Decay reduces peak errors in isolated instances, it demonstrates insufficient robustness against stochastic gradient noise. The optimized framework yields exceptional predictive fidelity, with the GRU and LSTM models attaining R² values of 0.9495 and 0.9443, respectively. Beyond methodological advances, this study establishes a reliable computational baseline for site-specific temporal air quality monitoring, offering actionable insights into the interplay between anthropogenic emissions and climate-driven volatility. By supporting industrial emissions management and evidence-based policy, this study contributes to the broader goals of mitigating air pollution in a changing climate and advancing ecological co-governance.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"397 ","pages":"Article 144875"},"PeriodicalIF":8.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146260411","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}