Archives of Environmental Contamination and Toxicology最新文献

{"title":"Biological Diversity Associated with Pesticides Residues in Certain Egyptian Watercourses.","authors":"Asmaa Abdel-Motleb, Rania M Abd El-Hamid, Sara S M Sayed","doi":"10.1007/s00244-025-01129-6","DOIUrl":"https://doi.org/10.1007/s00244-025-01129-6","url":null,"abstract":"<p><p>The aquatic environment has been contaminated by pyrethroids and triazole pesticide applications, which pose serious health risks to the aquatic ecosystem and human beings. Therefore, the current study aims to evaluate water quality parameters, fungal diversity, and distribution of snails and aquatic plants of certain Egyptian water courses contaminated with pyrethroids and triazole pesticides. Seasonal samples were taken throughout 2021 from different water courses at Giza Governorate and Tanta (Gharbeya Governorate). Qualitative and quantitative surveys showed significant differences in water physical parameters between the two investigated governorates. Deltamethrin, permethrin, Es-fenvalerate, and lambada-cyhalothrin showed the highest pyrethroids concentrations, while tebuconazole, tetraconazole, and difenoconazole were the highest triazole concentrations. Fungal diversity displayed 21 molecularly identified fungal species related to four fungal genera: Aspergillus, Fusarium, Penicillium, and Trichoderma. Penicillium sp. and Aspergillus niger were the most frequent species. Snail diversity recorded 10 and 9 species in Giza and Tanta, respectively. Physa acuta was the most abundant snail. Ten species of aquatic plants were observed in Giza, while six species were observed in Tanta. Specifically, Eichhornia crassipes and Lemna gibba were the dominant species in the two governorates, with the relative abundance (39 and 22%) in Giza and (27 and 23%) in Tanta, respectively. Water quality parameters and seasonal variations could control fungal diversity, snails, and aquatic plant distribution. Different relations between pesticides and biological communities may reflect the ability/inability of certain snails and fungi species to commensalism with pesticide concentrations. Continuous pesticide monitoring is essential for life below water and aligns with SDG14.</p>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143966043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Potentially Toxic Elemental Dispersion from the Brick Kilns: Preliminary Exploration of Mechanistic Pathways.","authors":"Md Kawsaruzzaman, Rahat Khan, Muhibul Munim, Amit Hasan Anik, Sumya Hossain, Abubakr M Idris, Md Harunor Rashid Khan, Saad Aldawood, Abu Hekmot Mohammad Saadat, Md Ahosan Habib, Mahbuba Begum, Dhiman Kumer Roy","doi":"10.1007/s00244-025-01128-7","DOIUrl":"https://doi.org/10.1007/s00244-025-01128-7","url":null,"abstract":"<p><p>This study investigates the contamination status and dispersion of 11 potentially toxic elements by exploring the potential mechanistic pathways by analyzing 60 samples (coal, ash, topsoil, and subsoil) from and around the coal-based brick kilns by neutron activation analysis. The mean_n=10 concentrations (μg g^-1) of scandium (Sc: 3.85), zinc (Zn: 79.21), Antimony (Sb: 4.06), and cesium (Cs: 4.81) in coal samples and manganese (Mn: 488), antimony (Sb: 10.9), and cesium (Cs: 20.3) in ash samples were 2.8-4.3 times and 1.1-2.5 times higher than world average values, respectively. In soil samples, average_n=40 abundances (μg g^-1) of chromium (Cr: 109), zinc (Zn: 144), arsenic (As: 8.98), rubidium (Rb: 113), antimony (Sb: 2.29), and cesium (Cs: 14.3) are 1.1-5.7 times higher than the crustal values. Additionally, geo-environmental indices showed that cesium (Cs) and chromium (Cr) had undergone severe modification relative to the crustal value, and the corresponding soil samples were moderately contaminated. The positive matrix factorization (PMF) model reveals that aerodynamic transportation contributes 22% to the elemental transportation of manganese, titanium, and iron throughout the soil profile in distant soil. In comparison, hydrodynamic transportation contributes 25% for As, Zn, and Sc in both topsoil and subsoil in the nearby soil. However, the combined process of bio-geo-accumulation, hydrodynamic leaching, and aerodynamic convection mechanisms contributes 53% of the dispersion and distribution of cesium (Cs), cobalt (Co), rubidium (Rb), and chromium (Cr) in the ambient pedosphere around the brick kilns which local geology, soil properties, solubility, and weathering can further influence. Our research findings contribute to advancing scientific approaches for investigating soil contamination, including the mechanistic pathways of potentially toxic elements and the risks associated with brick kilns.</p>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143953590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Illusion of Incense Smoke and Associated Health Risk: An Investigation of Ocular and Respiratory Particulate Deposition","authors":"Niveditha Muruganandam,&nbsp;Rajeshkumar Venkatachalam,&nbsp;Ramsundram Narayanan,&nbsp;S. N. Vidhya Bharathi,&nbsp;Mayildurai Rajagopal,&nbsp;Abinayaa Vellayappan,&nbsp;Nisha Khanam","doi":"10.1007/s00244-025-01119-8","DOIUrl":"10.1007/s00244-025-01119-8","url":null,"abstract":"<div><p>The widespread use of incense in indoor environments, particularly in cultural and religious practices, poses significant health risks due to particulate matter (PM) emissions. This study examines the chemical composition, particle morphology, and deposition dynamics of PM from four types of incense: Cup dhoop, Cone dhoop, Natural Incense Powder, and Agarbatti. Advanced analytical techniques, including SEM, FTIR, ICP-MS, and CAM, were employed to characterize particles, focusing on their size, elemental makeup, and surface properties. Particle sizes ranged from 12.02 µm to 422.3 nm, with lenses showing higher concentrations than filters. Elements such as sodium (300 µg/m³) and mercury (1.99 µg/m³) were prominent in lenses, while arsenic (6.2 µg/m³) and cadmium (0.19 µg/m³) were dominant in filters. Neurotoxins like aluminum, lead, and mercury highlighted potential risks, including oxidative stress and systemic toxicity. Deposition modeling revealed age-related differences, with children (8 years) experiencing higher pulmonary deposition (16.8% for Cup dhoop), while adults (21 years) showed greater head region deposition (37.6% for Agarbatti). Hydrophobic particles in filters (contact angle 119.2°) contrasted with hydrophilic particles in lenses (69.8°), increasing ocular exposure risks. Cone dhoop exhibited the highest cancer risk, affecting 5 in 100,000 individuals, emphasizing its hazardous nature. FTIR identified microplastics like polypropylene and polyvinyl chloride, known to adsorb and transport heavy metals, compounding health risks. These findings highlight the critical health impacts of incense emissions, particularly for children, and underscore the urgent need for stricter regulations, improved ventilation, and public awareness to mitigate exposure.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"88 3","pages":"356 - 376"},"PeriodicalIF":3.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Interactions of Major Ions, pH, and Dissolved Organic Carbon (DOC) on Transepithelial Potential (TEP) in Rainbow Trout: are there Implications for the Prediction of Salt Toxicity?","authors":"Carolyn Morris,&nbsp;Anne Crémazy,&nbsp;Colin J. Brauner,&nbsp;Chris M. Wood","doi":"10.1007/s00244-025-01125-w","DOIUrl":"10.1007/s00244-025-01125-w","url":null,"abstract":"<div><p>Freshwater salinization is increasing globally through seawater intrusion, road de-icing, and changes in anthropogenic land uses. Concurrently, freshwaters are browning with the rise in dissolved organic carbon (DOC) concentrations, while water pH is falling. Elevations in external major ion concentrations (Na⁺ or Ca²⁺) and low pH, independently disturb osmoregulatory homeostasis in freshwater organisms. Several studies have demonstrated that DOC often mitigates osmoregulatory stress responses to acidic pH. However, the interactive effects of these three water quality parameters together have been relatively understudied. Transepithelial potential (TEP), the electrical gradient across the gills between the animal and the external water, can be used as an index of osmoregulatory stress. We investigated whether DOC and exposure to elevated major ions interact with TEP responses at circumneutral and low environmental pH in the freshwater rainbow trout. Two natural DOCs, one allochthonous and the other autochthonous, were used. To aid interpretation, three model compounds of known chemical structure were also employed (tannic acid, sodium dodecyl sulfate, bovine serum albumin), based on the criteria that they structurally resemble or functionally behave like certain chemical moieties of humic or fulvic acids, major components of DOC. The Multi-Ion Toxicity Model predicts that a disturbance in absolute TEP is indicative of salt toxicity; however, recent studies have shown that ΔTEP (the change in TEP relative to the baseline) may be more predictive. Our data followed a pattern that could be described by the Michaelis–Menten equation. Therefore, considering Michaelis–Menten constants (<i>Km</i> and <i>ΔTEP</i>_<i>max</i>), absolute TEP and ΔTEP, we used a weight of evidence approach to predict how DOC and pH will influence Na⁺ or Ca²⁺ toxicity. We conclude that key chemical moieties of DOC will likely play pH-dependent roles in both Na⁺ and Ca²⁺ toxicity.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"88 3","pages":"303 - 323"},"PeriodicalIF":3.7,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143810407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Copper Accumulation Through Diet Versus Direct Water Exposure Routes in a Dragonfly Nymph/Mosquito Larvae Laboratory Food Chain","authors":"Dean E. Fletcher,&nbsp;Jennifer E. Dirks,&nbsp;Erin A. Spivey,&nbsp;Guha Dharmarajan","doi":"10.1007/s00244-025-01127-8","DOIUrl":"10.1007/s00244-025-01127-8","url":null,"abstract":"<div><p>Aquatic organisms can uptake metals directly from contaminated water or by consuming contaminated prey. Knowing the relative importance of these routes is critical to understand how metals enter and move through aquatic food webs. We previously established that nymphs of the aquatic dragonfly <i>Erythemis simplicicollis</i> accumulate elevated copper (Cu) concentrations when living in contaminated wetlands, but the route of uptake was not identified. In this study, we evaluate copper accumulation with a model two-trophic-level laboratory food chain comprised of <i>E. simplicicollis</i> dragonfly nymphs as predators and <i>Aedes aegypti</i> mosquito larvae as prey to gain better insight into Cu accumulation dynamics in these aquatic insect predators. Treatments consisted of dragonfly nymphs exposed to copper through diet (<i>A. aegypti</i> larvae prey exposed to 100 µg/L Cu-contaminated water), water (100 µg/L Cu), diet + water, and a control. Each treatment included 15 replicates, and 10 pretreatment nymphs were analyzed. Exposures lasted 32 days or until nymph death. Copper accumulation in nymphs and nymph mortality was compared among treatments. Eating contaminated prey did not elevate copper concentrations in <i>E. simplicicollis</i>. In contrast, highest copper concentrations accumulated in <i>E. simplicicollis</i> when exposed to contaminated water, in both the water-only and in the diet + water treatments. Additionally, mortality was greater when exposed to copper-contaminated water. Even though the nymphs did not trophically accumulate Cu, direct uptake of Cu from water provides a point of Cu entry into a food chain.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"88 3","pages":"277 - 288"},"PeriodicalIF":3.7,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143762986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"First Retrospective Study of Avian Mercury Exposure in a Tropical ASGM Hotspot","authors":"Sarah A. Dzielski,&nbsp;Subir Shakya,&nbsp;Yeni A. Mulyani,&nbsp;Mohammad Irham,&nbsp;Dewi M. Prawiradilaga,&nbsp;N. Roxanna Razavi","doi":"10.1007/s00244-025-01124-x","DOIUrl":"10.1007/s00244-025-01124-x","url":null,"abstract":"<div><p>Artisanal and small-scale gold mining (ASGM) is the largest anthropogenic source of mercury globally. Few studies have explored how this toxicant affects avian wildlife in Indonesia, an ASGM hotspot. Here, we use feather samples from museum specimens (<i>n</i> = 92) of Indonesian birds to examine changes through time in methylmercury (MeHg), diet, and foraging habitat (inferred from stable isotope ratios of nitrogen, <i>δ</i>¹⁵N, and carbon, <i>δ</i>¹³C, respectively). We ask how MeHg changes between time period (1860–1980 vs. 1980–2019) given increases in mercury emissions due to ASGM and describe how foraging guild and among-species variation in diet influence Indonesian bird feather MeHg concentrations. Time period was not a significant factor, with specimens associated with increased ASGM activity (collected post-1980) not significantly higher in MeHg concentrations compared to specimens collected pre-1980. Feather MeHg concentrations varied significantly among species, foraging guilds, and by habitat use. Carnivore and insectivore MeHg concentrations were above thresholds associated with sublethal effects. This is the first report of MeHg in Indonesian passerines, kingfishers, and woodpeckers. It provides critical information on mercury exposure in a region with high avian diversity that is severely impacted by mercury pollution.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"88 3","pages":"289 - 302"},"PeriodicalIF":3.7,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143699365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Arsenic Speciation, an Evaluation of Health Risk Due to the Consumption of Two Fishes from Coastal Marine Areas of the Southwestern Atlantic Ocean (SWAO)","authors":"Sabrina Ignacio,&nbsp;Jonatan Schlotthauer,&nbsp;Mirna Sigrist,&nbsp;Alejandra V. Volpedo,&nbsp;Gustavo A. Thompson","doi":"10.1007/s00244-025-01123-y","DOIUrl":"10.1007/s00244-025-01123-y","url":null,"abstract":"<div><p>Arsenic (As) is naturally occurring and is found in different forms, some of which are considered toxic to human health and frequently present in fishery resources. The aim of this work was to determine the contribution of toxic As species to the total As in muscle of two commercial fish species (<i>Micropogonias furnieri</i> and <i>Urophycis brasiliensis</i>) and to assess the toxicological risk associated with their consumption, considering different exposed groups. The total As concentrations found exceeded local guideline recommendations (&gt; 1 mg kg⁻¹ wet weight), but the concentrations of the toxic As species were below this threshold. The inorganic As levels do not exceed the international guideline recommendations (0.03–0.15 μg kg⁻¹ bw per day of iAs). Both interspecific and intraspecific differences in As concentrations were found. Non-carcinogenic and carcinogenic risk values indicated that the exposed groups would not experience health risks through consumption of either fish species. However, due to the lack of an established safe consumption limit for iAs or As species worldwide, there are currently no legal tools to ensure that these fish species are safe for human consumption.</p><h3>Graphic Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"88 3","pages":"253 - 276"},"PeriodicalIF":3.7,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143647005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Bioavailability of Al, Fe, Mn and Zn in a Decommissioned Mining Area Evaluated by Biomonitoring and Passive Samplers: Robustness, Efficiency and Relationships Between Biotic and Abiotic Monitoring Approaches","authors":"Guilherme dos Santos Lima,&nbsp;Carlos Eduardo Eismann,&nbsp;Lucas Pellegrini Elias,&nbsp;Luiz Felipe Pompeu Prado Moreira,&nbsp;Amauri Antonio Menegario","doi":"10.1007/s00244-025-01122-z","DOIUrl":"10.1007/s00244-025-01122-z","url":null,"abstract":"<div><p>In situ assessment of metal bioavailability is crucial for evaluating the degree of contamination in aquatic systems. This study evaluated the bioavailability of Al, Fe, Mn and Zn in water from three sites in a decommissioned mining area near the city of Poços de Caldas (State of Minas Gerais, Brazil). A multi-tool approach was used, combining DGT, transplanted fish (<i>Oreochromis niloticus</i>) and water samples (total and dissolved metal concentration analyses). Samples were taken at 14, 28 and 42-day intervals. Livers, gills and muscles of transplanted fish were analyzed after acid digestion in microwaves and determined by ICP-OES. Significant increases in transplanted fish for Mn and Zn concentrations were observed in the gills. Total and dissolved concentrations showed large fluctuations, possibly influenced by factors such as the rainy season, pH changes, and varying effluent discharges at each sampling point. The concentration of the element measured by DGT devices, proved to be an effective indicator of temporal and spatial variations in the bioavailable levels of Al, Fe, Mn and Zn across all sites analyzed. However, the weak correlations between the different monitoring methods highlight their complementary nature, as each approach captures distinct aspects of metal bioavailability. This underscores the importance of integrating multiple methodologies to provide a more comprehensive understanding of metal dynamics in complex environmental scenarios.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"88 3","pages":"340 - 355"},"PeriodicalIF":3.7,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143582168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Probabilistic Health Risk Assessment and Grading Benchmark Estimation of Atmospheric PM2.5-Bound Heavy Metals in China","authors":"Wei Huang,&nbsp;Weilian Sun,&nbsp;Chifei Zhou,&nbsp;Keyan Long,&nbsp;Zunzhen Zhang","doi":"10.1007/s00244-025-01118-9","DOIUrl":"10.1007/s00244-025-01118-9","url":null,"abstract":"<div><p>The formulation of reasonable concentration classification standards can significantly enhance the protection of populations against atmospheric heavy metals, and the development of these standards should be grounded in national-level probabilistic risk assessment to establish multiple grading benchmarks. In this study, the probabilistic health risk assessment model was used for the first time to assess the health risks of hazardous metals [arsenic (As), cadmium (Cd), cobalt (Co), chromium (Cr), mercury (Hg), manganese (Mn), nickel (Ni), lead (Pb), and vanadium (V)] based on a publication dataset containing 57,737 PM_2.5-bound heavy metal samples from China. Our results showed that the average non-carcinogenic risk attributed to heavy metals in all provinces of China was less than 1. In contrast, the average carcinogenic risk was greater than 10^–6 in all provinces. The logarithmic mean non-carcinogenic health risks for the eight non-carcinogenic metals were ranked as follows: V (− 1.55 ± 0.96) &gt; As (− 1.79 ± 0.96) &gt; Mn (− 1.84 ± 0.82) &gt; Co (− 2.05 ± 0.89) &gt; Cd (− 2.14 ± 0.94) &gt; Ni (− 2.59 ± 0.92) &gt; Cr (− 3.26 ± 0.93) &gt; Hg (− 4.86 ± 0.91), while the logarithmic mean carcinogenic health risk for the seven carcinogenic metals was Cr (− 5.33 ± 0.93) &gt; V (− 5.79 ± 0.96) &gt; As (− 5.98 ± 0.96) &gt; Co (− 6.32 ± 0.89) &gt; Cd (− 6.89 ± 0.94) &gt; Pb (− 7.02 ± 0.93) &gt; Ni (− 7.22 ± 0.92). The metals that contributed most to the non-carcinogenic and carcinogenic risks were V (35.86%) and Cr (57.61%), respectively. Through probabilistic risk assessment, we constructed seven-level health benchmarks for carcinogenic metals (As, Cd, Co, Cr, Ni, Pb, V). These benchmarks of extremely low health risk for the seven carcinogenic metals (As, Cd, Co, Cr, Ni, Pb, V) were 0.00037 μg/m³, 0.0011 μg/m³, 0.00012 μg/m³, 0.00011 μg/m³, 0.0043 μg/m³, 0.025 μg/m³, and 0.00031 μg/m³, respectively. Overall, this study is the first nationwide comprehensive assessment of the probabilistic risk of atmospheric PM_2.5-bound toxic metals and provides a theoretical basis for revising and improving China's air quality standards.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"88 3","pages":"377 - 396"},"PeriodicalIF":3.7,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Geochemical Behavior of Uranium and Arsenic in Watercourse Sediments of the Los Planes Watershed, Baja California Sur, Mexico: Assessment of Anthropogenic and Natural Factors","authors":"J. Wurl,&nbsp;M. A. Imaz-Lamadrid,&nbsp;L. Mendez-Rodríguez,&nbsp;K. Brindha,&nbsp;M. Schneider","doi":"10.1007/s00244-025-01121-0","DOIUrl":"10.1007/s00244-025-01121-0","url":null,"abstract":"<div><p>In Baja California Sur (BCS), Mexico, the municipality of La Paz has reported higher cancer rates compared to nearby areas, linked to arsenic contamination from abandoned gold mines and naturally high uranium (U) and arsenic (As) levels in sediments. This study evaluates the impact of human activities on natural U and As anomalies in watercourse sediments of the Los Planes watershed and adjacent areas. The geochemical database included 229 analyses from the Mexican Geological Service (SGM 2017) and nine samples analyzed via Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Multivariate statistical and geostatistical methods were used to interpret the data. Using the kriging method for U and the nearest neighbor algorithm for As, spatial models were developed to define the anomalies’ positions and extents. Hierarchical cluster analysis on 85 analyses and 28 parameters identified six clusters representing different influence areas. The study found As concentrations exceeding the Mexican limit of 22 mg/kg for soils in 13 cases, with a maximum of 1520 mg/kg, primarily due to historic gold mine contamination. U concentrations ranged from 0.53 mg/kg to 7.35 mg/kg, within international protection limits, originating from Sierra la Gata’s granites and granodiorites, with potential secondary enrichment in topsoil. The possibility of anthropogenic U impact from phosphatic fertilizers is noted, warranting further investigation.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"88 3","pages":"324 - 339"},"PeriodicalIF":3.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143536560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}