Archives of Environmental Contamination and Toxicology最新文献

{"title":"Mapping Radionuclide Exposure Through Marine Gastropods in Coastal Waters of Kerala, South-West India","authors":"Yaseen Nawaz Shareef,&nbsp;Mohan Feroz Khan","doi":"10.1007/s00244-026-01215-3","DOIUrl":"10.1007/s00244-026-01215-3","url":null,"abstract":"<div><p>Naturally occurring radionuclides in marine food webs are an important radiation exposure pathway for coastal populations, especially in high-background natural radiation areas (HBNRAs). This study investigated the accumulation, spatial distribution, ecological controls, and radiological implications of ²³⁸U, ²³²Th, ²¹⁰Po, and ²¹⁰Pb in 15 commercially and ecologically important gastropod species collected along the heavy mineral-rich Kollam coast of southwest India. The activity concentrations ranged from BDL(≤ 0.5)–1.8 Bq kg⁻¹ for ²³⁸U, 0.62–4.1 Bq kg⁻¹ for ²³²Th, 14.7–76.4 Bq kg⁻¹ for ²¹⁰Po, and 3.2–56.4 Bq kg⁻¹ for ²¹⁰Pb, with overall accumulation following ²¹⁰Po ≫ ²¹⁰Pb ≫ ²³²Th &gt; ²³⁸U. Significant differences were observed among species, taxonomy, feeding guilds, and stations for ²¹⁰Po and ²¹⁰Pb (Kruskal–Wallis, <i>p</i> &lt; 0.01), whereas ²³⁸U and ²³²Th showed limited biological variability. Strong positive correlations between ²¹⁰Po and ²¹⁰Pb (<i>r</i> &gt; 0.80, <i>p</i> &lt; 0.001) and elevated ²¹⁰Po/²¹⁰Pb ratios (1.09–4.59) indicated preferential enrichment and retention of ²¹⁰Po. The annual committed effective dose (A_CED) was estimated to vary between 62.5 and 229.5 µSv y⁻¹, with an average value of 178 µSv y⁻¹. Although the carcinogenic risk to the general public was minimal, the results highlight the importance of thorough tailored species-specific ecological monitoring, guidelines for human consumption, and strategies for sustainable management.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"91 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189574","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":"Correction: Bioaccumulation Patterns of Potentially Toxic Elements in Three Grouper Species from the Nizampatnam Coast, India: Multivariate Analysis and Risk Assessment","authors":"Darwin Chatla,&nbsp;Padmavathi Pamulapati,&nbsp;Suneetha Kola,&nbsp;Ravikumar Kapavarapu,&nbsp;Mahmoud Mahrous M. Abbas","doi":"10.1007/s00244-026-01216-2","DOIUrl":"10.1007/s00244-026-01216-2","url":null,"abstract":"","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"91 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149179066","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":"Maternal–Pup Mercury Relationship in South American Sea Lions and Fur Seals","authors":"Anaclara Roselli-Laclau,&nbsp;Javier García-Alonso,&nbsp;Alex Valdés,&nbsp;Mariana Freitas-Souza,&nbsp;Marcelo G. Almeida,&nbsp;Carlos Eduardo de Rezende,&nbsp;Valentina Franco-Trecu","doi":"10.1007/s00244-026-01227-z","DOIUrl":"10.1007/s00244-026-01227-z","url":null,"abstract":"<div><p>Mercury (Hg) is a non-essential, globally distributed toxic metal that bioaccumulates in aquatic organisms and biomagnifies across trophic levels, posing a threat to top predators such as marine mammals. Our aim was to evaluate total mercury (THg) relationships in mother–pup pairs of two pinniped species, South American sea lions (<i>Otaria flavescens</i>) and South American fur seals (<i>Arctocephalus australis</i>), from Isla de Lobos, Uruguay. We quantified THg in maternal hair and pup lanugo from 11 <i>O. flavescens</i> and 46 <i>A. australis</i> mother–pup pairs. THg concentrations were significantly higher in <i>O. flavescens</i> than in <i>A. australis</i> for both adult females (30.5 ± 9.3 μg/g vs. 5.7 ± 3.4 μg/g, dry weight) and pups (25.3 ± 13.2 μg/g vs. 4.4 ± 2.5 μg/g, dry weight). Hg levels in <i>O. flavescens</i> pups are among the highest recorded for pinnipeds. Pup THg concentrations were positively associated with maternal THg concentrations in both species, although the explanatory power of the final models differed markedly between species (R² = 0.75 in <i>O. flavescens</i> and R² = 0.20 in <i>A. australis</i>). In <i>O. flavescens</i>, male pups had lower THg concentrations than females for a given maternal THg concentration, whereas no sex effect was detected in <i>A. australis</i>. The presence of THg in lanugo formed in utero provides evidence of prenatal Hg exposure, while the variability in mother–pup relationships limits the use of pup lanugo as a quantitative proxy for THg concentrations in individual mothers. Instead, pup lanugo may provide a minimally invasive matrix for characterizing prenatal Hg exposure and broader species- or population-level patterns.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"91 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149165161","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":"Tracing Industrial Microplastics Footprint in Fiji’s Marine Environment","authors":"David Rohindra,&nbsp;Tejesvi Patel,&nbsp;Roselyn Lata,&nbsp;Timaima Waqainabete,&nbsp;Robert Chang","doi":"10.1007/s00244-026-01226-0","DOIUrl":"10.1007/s00244-026-01226-0","url":null,"abstract":"<div><p>This study investigated the presence of microplastics (MP) in drainage channels that carry stormwater and greywater runoffs from areas surrounding the industrial sites on Viti Levu, Fiji’s main island. Water samples were collected, digested with hydrogen peroxide, separated by density separation and filtered through an aluminum oxide Anodisc membrane filter (0.2 μm pore size) for particle recovery. The filter membranes were observed under a microscope for the presence, size and morphology of MP. 93.4% of particles ≥ 100 μm were confirmed as MP by ATR-FTIR. Across all sampling locations, an average MP concentration of 2.23 ± 0.78 MP L⁻¹ was observed, with the highest MP abundance (3.08 MP L^− 1) at Site 5 and the lowest (1.26 MP L^− 1) at Site 2. Fragments accounted for the largest number of MP (48.08%), followed by fibers (47.83%) and films (4.09%). Most of the MP (52.30%) were smaller than 500 μm. Polyethylene (PE, 46.29%) and polystyrene (PS, 33.76%) were the most prevalent polymers, reflecting their extensive use in packaging materials. These findings highlight the substantial role of industrial activities in MP contamination of the marine ecosystems. In Fiji, PS has been completely banned as a single use plastic, while PE is restricted under certain conditions. It is important to extend this ban to include PE and PS packaging materials to accelerate the elimination of these plastics from Fiji’s environment.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"91 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149164094","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":"Multivariate Analysis and Characteristics of Selected Potentially Toxic Elements in Muscle Tissue and Hepatopancreas of Oysters (Crassostrea spp.) from Coastal Areas of Quang Ninh: Bioaccumulation Features, Health Risk Assessments and Origin Sources","authors":"Xuan-Quang Nguyen,&nbsp;Van-Hao Duong,&nbsp;Marckasagayam Priyadharshini,&nbsp;Mohamed Saiyad Musthafa,&nbsp;Khai M. Nguyen,&nbsp;Thanh-Xuan Pham-Thi,&nbsp;Nguyen Duc Hieu,&nbsp;Hoang Bao Anh,&nbsp;Hiep Hoang Van,&nbsp;Dinh-Kien Ta,&nbsp;Trung-Tien Chu","doi":"10.1007/s00244-026-01212-6","DOIUrl":"10.1007/s00244-026-01212-6","url":null,"abstract":"<div><p>The presence of potentially toxic elements (PTEs) in the marine environment poses potential risks to both marine ecosystems and human health. This study investigated concentrations, bioaccumulation patterns, and associated health risks of PTEs in oysters (<i>Crassostrea spp.</i>) collected from the coastal waters of Quang Ninh, Vietnam. Zinc (Zn) had the highest concentrations (65.4 mg/kg in muscle tissue and 56.8 mg/kg in hepatopancreas), wherea mercury (Hg) showed the lowest concentrations (0.0064 mg/kg and 0.0034 mg/kg, respectively) in both organs. There was a positive correlation between shell size and weight with PTE concentrations in both organs, suggesting increased bioaccumulation with long-term exposure to the environment. Principal component analysis (PCA) identified three distinct sources of PTEs: anthropogenic inputs from industrial, agricultural, and transportation activities (PC1, variance 33.0%), mixed anthropogenic and natural sources (PC2, variance 22.9%), and natural sources combined with the impact of coal mining in the region (PC3, variance 16.8%). Health risk assessment using the Risk Quotient (RQ) revealed that cadmium (Cd) in the hepatopancreas posed the most significant health concern, with RQ values exceeding 1 under the worst-case scenarios. These findings provided a valuable scientific basis for regional environmental pollution monitoring and control measures. In addition, the results emphasize the need for continuous monitoring of Cd concentrations for sustainable aquaculture development in the region.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"91 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149079443","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":"From Soil Contamination to Internal Metal Burden: Drivers of Fe, Cu and Zn Bioaccumulation in Tropical Achatininae Across a Peri-Urban Contamination Gradient (Abidjan, Côte d’Ivoire)","authors":"Gisette Affoué Kouadio,&nbsp;Maxime Louzon,&nbsp;Jean-Didié Memel,&nbsp;Elodie Larissa Katta","doi":"10.1007/s00244-026-01222-4","DOIUrl":"10.1007/s00244-026-01222-4","url":null,"abstract":"<div><p>Peri-urban soils in rapidly expanding West African cities are subject to increasing metal contamination from industrial, urban, and agricultural activities, yet ecotoxicological risk assessment tools adapted to tropical contexts remain scarce. This study characterises the tissue-specific accumulation of iron (Fe), copper (Cu), and zinc (Zn) in the hepatopancreas and edible flesh of two tropical Achatininae land snails, <i>Achatina achatina</i> and <i>Archachatina ventricosa</i>, exposed to thirteen contrasted peri-urban soils across the Abidjan district (Côte d'Ivoire). A Toxic Pressure Index (TPI) approach was applied in parallel to soil and tissue compartments to compare external contamination pressure with internal metal burden. Bioconcentration factors (BCF) were calculated for each metal, tissue, and species combination, and the influence of soil physicochemical properties on metal transfer was assessed through univariate and multivariate regression modelling. Soil TPI was dominated by zinc at all sites, with pseudo-total Zn concentrations reaching up to 37,656 mg kg⁻¹. No significant relationship was detected between TPI soil and TPI tissue in any compartment-species combination, demonstrating a systematic decoupling between external soil pressure and internal burden attributable to homeostatic physiological regulation and the limited bioavailability of pseudo-total metal fractions. BCF analysis revealed universal biodilution of Fe and Zn across all tissues and both species, with log–log regression slopes approaching − 1 for Zn in the flesh of both species, providing quantitative evidence of a homeostatic ceiling operating independently of soil loading. Copper was the sole element consistently bioconcentrated above unity in the hepatopancreas, in 8 out of 13 sites for <i>A. achatina</i> and 11 out of 13 for <i>A. ventricosa</i>, reflecting physiological demand for Cu. BCF values were significantly higher in the hepatopancreas than in the flesh for all metals and both species (Wilcoxon, all <i>p</i> &lt; 0.01), with hepatopancreas-to-flesh ratios ranging from 3- to 22-fold. A significant positive correlation between hepatopancreatic and flesh BCF of Cu in both species has direct implications for consumer exposure assessment given the traditional whole-body consumption of these snails. No significant interspecific differences in BCF were detected, suggesting broadly comparable metal regulation strategies between the two species. Multivariate regression modelling failed to identify ecologically coherent models combining soil metal concentrations and physicochemical soil properties as joint predictors of BCF.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"91 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149035400","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":"Trace Metal Concentrations in Black Swan (Cygnus atratus) Eggshells from Urban and Coastal Wetlands in Southeastern Australia","authors":"Damien Nzabanita,&nbsp;Jacinta Colvin,&nbsp;Lydon Alexandrou,&nbsp;Raoul A. Mulder,&nbsp;Deb Sullivan,&nbsp;Damian C. Lettoof,&nbsp;Dayanthi Nugegoda","doi":"10.1007/s00244-026-01220-6","DOIUrl":"10.1007/s00244-026-01220-6","url":null,"abstract":"<div><p>Urban wetlands are increasingly exposed to anthropogenic contaminants, including trace metals that may accumulate within aquatic food webs and pose risks to wildlife. This study quantified trace metal concentrations in post-hatched black swan (<i>Cygnus atratus</i>) eggshells collected from an urban wetland (Albert Park Lake, Melbourne; <i>n</i> = 17) and a coastal wetland (Pelican Island, Gippsland Lakes; <i>n</i> = 20) in southeastern Australia. Eggshells were analysed for arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), iron (Fe), lead (Pb), manganese (Mn), nickel (Ni), selenium (Se), and zinc (Zn) using inductively coupled plasma mass spectrometry (ICP-MS/MS). Significant spatial differences were detected for several elements, with Mn, Zn, and Pb concentrations significantly higher in eggshells collected from the urban wetland. In contrast, As, Cr, Fe, Ni, and Cu did not differ significantly between wetlands. Elevated metal concentrations in urban eggshells were consistent with anthropogenic contaminant inputs associated with urban runoff and sediment contamination. The findings demonstrate that black swan eggshells effectively reflect local environmental trace metal exposure and provide a practical non-invasive biomonitoring matrix for assessing contamination in wetland ecosystems.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"91 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00244-026-01220-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149023726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Color-Dependent Adsorption Behavior of Tetracycline onto Aged Microplastics","authors":"Ruixin Jin,&nbsp;Xiang Li,&nbsp;Mingyu Li,&nbsp;Maocai Shen","doi":"10.1007/s00244-026-01221-5","DOIUrl":"10.1007/s00244-026-01221-5","url":null,"abstract":"<div><p>Microplastics have become a significant problem threatening both ecological systems and human health. This study focuses on four colors (red, yellow, blue, and green) of polypropylene (PP) and polymethyl methacrylate (PMMA), and the impact of color differences before and after aging on their environmental behavior. The findings indicate that color is a key factor influencing the aging behavior of microplastics. The red PP surface develops dense wrinkles, while the blue PP exhibits irregular flaking. After aging, the average particle size of PP decreases by 6–30%, with red and yellow PP particles showing even greater reductions. Adsorption studies reveal that microplastics display color-dependent patterns in their adsorption behavior toward tetracycline hydrochloride (TC-HCl). For virgin microplastics, the adsorption capacity order is red &gt; blue &gt; yellow ≈ green. After aging, this order shifts to red &gt; yellow ≈ green &gt; blue, with yellow and green microplastics showing significant improvements in adsorption performance. Both pH and ionic strength influence the adsorption behavior of colored microplastics. The adsorption of TC-HCl by virgin PP reaches its maximum at pH 9, whereas aged PP achieves maximum adsorption at pH 7. For PMMA, maximum adsorption capacity before and after aging occur at pH 5. Low concentrations of NaCl enhance adsorption capacity, but adsorption decreases as NaCl concentration increases. This study provides a theoretical basis for assessing the ecological risks posed by different colored microplastics in complex pollution scenarios.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"91 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148987003","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":"Effects of Tetramethyl Bisphenol F Exposure on Daphnia magna Growth, Reproduction, Locomotor Behavior and Transcriptomic Responses","authors":"Xueqing Yang,&nbsp;Zhen Wang,&nbsp;Mengxue Zhang,&nbsp;Hongying Liu,&nbsp;Mengyuan Liang,&nbsp;Chenglin Zhang,&nbsp;Lei Wang,&nbsp;Shaobin Li","doi":"10.1007/s00244-026-01218-0","DOIUrl":"10.1007/s00244-026-01218-0","url":null,"abstract":"<div><p>Environmental concerns have intensified due to the widespread use of bisphenol analogues as BPA alternatives. In this study, we assessed the toxicity of Tetramethyl Bisphenol F (TMBPF) on <i>Daphnia magna</i> and investigated the underlying mechanisms, at multiple biological levels, encompassing transcriptomic pathway alterations, growth and reproductive impairment, and behavioral changes. The 48 h EC₅₀ was 1.30 mg/L, which is lower than that of BPA, BPF, BPS, and BPAF. The 21 d NOEC for reproduction was 0.20 mg/L, classifying TMBPF as a GHS Category 2 chronic aquatic toxicant. Transcriptomic analysis revealed concentration-dependent mechanisms: at 0.2 mg/L, pathways related to carbohydrate metabolism and lysosomal function were enriched; at 0.4 mg/L, extensive transcriptional disruption affected RNA polymerase, neuroactive ligand–receptor interaction, xenobiotic metabolism, oxidative stress, and inflammatory pathways. These molecular changes corresponded with impaired growth, reproduction, and swimming behavior. Overall, this study provides integrative evidence that TMBPF exhibits pronounced acute and chronic toxicity to aquatic invertebrates and may pose a higher ecological risk than conventional bisphenols. The findings highlight the necessity for cautious evaluation and regulatory consideration of emerging bisphenol substitutes before their widespread environmental application.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"91 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148927845","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":"Natural Radionuclides in Selected Freshwater Fishes from the Red River (Vietnam): Influence of Biological Characteristic and Implication for Human Health Risk","authors":"Xuan-Quang Nguyen,&nbsp;Van-Hao Duong,&nbsp;Thanh-Xuan Pham-Thi,&nbsp;Trung-Tien Chu","doi":"10.1007/s00244-026-01217-1","DOIUrl":"10.1007/s00244-026-01217-1","url":null,"abstract":"<div><p>Naturally occurring radioactive substances in freshwater ecosystems pose potential radiological risks to both aquatic organisms and humans through dietary exposure. This study quantified the activity concentrations of ²²⁸Ra, ²¹⁰Pb, ²²⁶Ra, ²¹⁰Po and ⁴⁰K in ten commonly consumed fish species from the Red River, Vietnam. The results showed significant inter-isotope variability, with ⁴⁰K dominating all samples. Mean activity concentrations were 1.22 ± 0.2 (LOD–7.61) for ²²⁸Ra, 9.1 ± 1.7 (LOD–37.1) for ²¹⁰Pb, 7.69 ± 1.04 (0.70–24.7) for ²²⁶Ra, 11.8 ± 0.9 (5.16–18.7) for ²¹⁰Po, and 101 ± 8.6 (65–169) Bq.kg⁻¹ for ⁴⁰K. These variations reflect the different behaviors of the isotopes in aquatic environments. Negative correlation was observed between ²²⁶Ra and body weight, suggesting morphological influences on radioactivity absorption in fish. Radiation risk assessments revealed average annual effective doses of 0.105 mSv.y⁻¹ (0.030–0.247 mSv.y⁻¹), significantly lower than the safety threshold, with lifetime cancer risks ranging from 1.4 × 10⁻⁷ to 7.7 × 10⁻⁷, within acceptable limits. Ecological risk assessment using the ERICA Tool revealed total dose rates ranging from 0.2 to 10.4 µGy.h⁻¹ (mean: 3.0 µGy.h⁻¹), with the Zig-zag eel exceeding the screening threshold of 10 µGy·h⁻¹, indicating a potential radiological risk for this species, while risks remained negligible for the remaining species. These findings enhance understanding of radionuclide dynamics in freshwater food webs and inform public health risk assessments for fish consumption in the Red River basin. The study establishes essential baseline data for regional radiation monitoring programs while contributing to biodiversity protection and food safety.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"91 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148886226","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}