Journal of environmental radioactivity最新文献

{"title":"Beyond survival: Can we engineer plants to thrive in and remediate radioactive environments?","authors":"Iqbal Hossen ,&nbsp;M. Mehedi Hasan Rocky ,&nbsp;Zinnat Rahman ,&nbsp;Ismail Rahman","doi":"10.1016/j.jenvrad.2026.107963","DOIUrl":"10.1016/j.jenvrad.2026.107963","url":null,"abstract":"<div><div>Radionuclide (RN) contamination remains a long-standing environmental and agricultural challenge in regions affected by nuclear accidents, mining, and industrial activities. This review compiles existing knowledge on RN sources, soil–plant transfer pathways, and the physiological, biochemical, and molecular processes governing plant responses to ionizing radiation. Major plant-based remediation approaches, including phytoextraction, phytostabilization, and rhizofiltration, are assessed, with consideration of their performance under field conditions involving long-term, low-level exposure. The influence of rhizosphere-associated microorganisms on RN behavior and plant tolerance is also discussed. Recent advances in plant bioengineering are summarized, with emphasis on genetic transformation, CRISPR-enabled genome editing, root-based experimental systems, and engineering of plant–microbe interactions, which collectively offer new opportunities to enhance RN uptake, immobilization, stress resilience, and overall plant performance. Examples include precise CRISPR modifications of metal-transport and stress-response genes, as well as microbial engineering approaches that optimize rhizosphere chemistry, nutrient acquisition, and RN transformation. We further examine key defense mechanisms, such as antioxidant systems, chelation and compartmentalization strategies, rhizosphere-mediated processes, and chromatin-level protection, that contribute to radiotolerance and remediation capacity. Finally, current limitations, including the scarcity of field-scale studies, limited molecular information for RN-tolerant plant species, and regulatory challenges, are outlined, together with future research needs aimed at improving the applicability of phytoremediation in radionuclide-contaminated environments.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"295 ","pages":"Article 107963"},"PeriodicalIF":2.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147592556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Measurements of stable ruthenium isotopes in nuclear debris samples","authors":"Genna M. Patton,&nbsp;Zachary A. Torrano,&nbsp;Dylan C. Flanagan,&nbsp;Fernando Rivera,&nbsp;Matthew E. Sanborn,&nbsp;Susan K. Hanson","doi":"10.1016/j.jenvrad.2026.107967","DOIUrl":"10.1016/j.jenvrad.2026.107967","url":null,"abstract":"<div><div>Ruthenium (Ru) fission product isotopes are important signatures in nuclear non-proliferation and treaty monitoring efforts. However, little is known about the distribution of Ru isotopes contained in samples from nuclear testing activities. This work details the measurement of the stable Ru isotopes ¹⁰⁰Ru, ¹⁰¹Ru, ¹⁰²Ru, and ¹⁰⁴Ru in nuclear debris samples from the Trinity nuclear test. Unusually elevated Ru concentrations are observed in the debris samples when compared to typical crustal abundances, and the isotopic profile reveals that the Ru is fissiogenic in origin. The observed ¹⁰⁴Ru/¹⁰¹Ru and ¹⁰²Ru/¹⁰¹Ru isotopic ratios are clearly different from the expected values based on cumulative fission product yields for ²³⁹Pu fission. Comparison of the observed Ru isotopic ratios with other fission products measured in the samples reveals that the 102 and 104 mass chains are depleted, and suggests that the observed isotopic ratios result from chemical fractionation of volatile precursors during debris condensation. The results represent a promising first characterization of stable Ru isotopes in samples from a nuclear test. Better characterization of source terms will improve future nuclear treaty monitoring efforts by providing a context in which to interpret unknown samples.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"295 ","pages":"Article 107967"},"PeriodicalIF":2.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147609113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Soil air radon as a seismic precursor: Disentangling meteorological and tectonic influences using machine learning","authors":"Hemn Salh ,&nbsp;Halgurd S. Maghdid ,&nbsp;Jahfer M. Smail ,&nbsp;Fatih Külahcı","doi":"10.1016/j.jenvrad.2026.107975","DOIUrl":"10.1016/j.jenvrad.2026.107975","url":null,"abstract":"<div><div>In this study, 78,721 soil air radon measurements (15-min intervals, December 2006–March 2008) were measured at a depth of ∼80 cm using an AlphaMETER-611 detector at the Gebze monitoring station, located near the North Anatolian Fault Zone (NAFZ)- Türkiye, and analyzed together with meteorological parameters and regional seismicity. Statistical methods, including correlation, cross-correlation, and hierarchical clustering, were first applied to distinguish environmental from seismic influences, revealing strong positive correlations with air and soil temperatures (r = 0.63–0.66, p &lt; 0.001), moderate negative correlation with relative humidity (r = −0.40, p &lt; 0.001), and weaker effects from precipitation (r = −0.18, p &lt; 0.05). Subsequently, three machine learning models, Long Short-Term Memory (LSTM), Support Vector Regression (SVR), and Random Forest (RF), were applied to identify possible anomalous deviations. Several positive anomalies preceded shallow earthquakes (M_L4.8–5.7) by 22, 18, 15, 8, 7, and 1 days. Cross-model agreement highlights reproducible radon anomalies temporally associated with seismic activity. The LSTM model achieved the highest reconstruction performance (R² = 0.86), and its anomaly amplitudes showed an exponential association with earthquake magnitude (R² = 0.998) in post-event analysis.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"295 ","pages":"Article 107975"},"PeriodicalIF":2.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147592543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 non-decontamination human activities on the reduction of ambient dose equivalent rates in residential areas near the Fukushima Daiichi Nuclear Power Plant","authors":"Minsik Kim ,&nbsp;Kazuya Yoshimura ,&nbsp;Kazuyuki Sakuma ,&nbsp;Alex Malins ,&nbsp;Tomohisa Abe ,&nbsp;Shigeo Nakama ,&nbsp;Masahiko Machida ,&nbsp;Kimiaki Saito","doi":"10.1016/j.jenvrad.2026.107931","DOIUrl":"10.1016/j.jenvrad.2026.107931","url":null,"abstract":"<div><div>In this study, both field measurements and simulation analyses were conducted to quantitatively assess the influence of human activities, such as traffic, excluding decontamination on the reduction of ambient dose equivalent rates in residential areas near the Fukushima Daiichi Nuclear Power Plant (FDNPP). In the field survey, data on radioactive cesium deposition, and road traffic volume (as a proxy for human activity) were collected to investigate correlations between human activity and radiological conditions. The results confirmed that ¹³⁷Cs deposition has been decreasing significantly in areas with higher levels of human activity. In particular, traffic volume showed a positive correlation with the reduction in 137Cs deposition, suggesting that activities such as vehicular movement may enhance the weathering of radioactive cesium and thereby accelerate the decrease in ambient dose equivalent rates. For the simulation analysis, the observed reduction rate of ¹³⁷Cs deposition was used as a parameter to quantitatively evaluate the effects of traffic-related activity. A Monte Carlo simulation was performed using the 3D-Air Dose Rate Evaluation System (3D-ADRES), which allows for detailed modeling of the surrounding environment. The simulation results confirmed that traffic-related activities promote a reduction in ambient dose equivalent rates on paved surfaces. Moreover, areas with a higher proportion of pavement exhibited more pronounced decreases in ambient dose equivalent rates, with traffic-related activities occurring after 10 years following the FDNPP accident leading to a projected reduction of approximately 50% at 20 years compared with no traffic-related activity. These findings demonstrate that human activities other than decontamination contribute significantly to the reduction of ambient dose equivalent rates, and their effects can be quantitatively evaluated through integrated measurement and simulation approaches.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107931"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147271239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"In Vitro cellular bioluminescence assay and organism-level responses to low-dose tritium irradiation","authors":"Olga V. Kolesnik ,&nbsp;Arina S. Fedotova ,&nbsp;Alexander A. Zhigarev ,&nbsp;Gennadii A. Badun ,&nbsp;Evgeniya G. Turitsyna ,&nbsp;Nadezhda S. Kudryasheva","doi":"10.1016/j.jenvrad.2026.107932","DOIUrl":"10.1016/j.jenvrad.2026.107932","url":null,"abstract":"<div><div>The paper studies physiological parameters of two organisms of different organizational levels – cells and animals – under low-dose radioactive exposure to tritium (&lt;1.57 mGy); luminescence intensity of luminous marine bacteria <em>Photobacterium phosphoreum</em> and physiological characteristics of high organisms (rabbits) were under investigation. Two-level parameters of rabbits were analyzed: general clinical characteristics (body temperature, respiratory rate, heart rate, weight, etc.) and clinical-hematological parameters of peripheral rabbit blood (i.e. phagocytic activity of leukocytes). Tritiated water (HTO) was used as a source of tritium. Luminous bacteria exhibited both activation and inhibition of bioluminescence under low-dose tritium exposure (&lt;0.35 mGy). General clinical characteristics of rabbits were within the physiological norm at 0.14-1.57 mGy. However, 0.14 mGy HTO exposure increased phagocytic activity, while 0.60 and 1.57 mGy doses suppressed it, demonstrating stimulatory and radiotoxic effects, respectively. Hence, the similarity in dose-response patterns between bacterial and rabbit cells was demonstrated. The radioprotective effects of humic substances (HS, a product of natural oxidative decomposition of soil organic matter) were also evaluated in both organisms. HS counteracted HTO toxicity in bacteria and rabbits, restoring physiological parameters (bioluminescence intensity and leukocyte phagocytic activity) to near-control levels (HTO-free conditions). As a result, a new approach has been proposed, that the rapid bacterial assay could be used to predict the cellular responses in higher organisms under low-dose radiation exposure; it can contribute to early warning of damage to higher organisms under chronic exposure. Further research is needed in accordance with this approach.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107932"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147271178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"A real-time analysis for diffusion and sorption parameters in compacted clay materials","authors":"Neng-Chuan Tien","doi":"10.1016/j.jenvrad.2026.107913","DOIUrl":"10.1016/j.jenvrad.2026.107913","url":null,"abstract":"<div><div>The long-term safety of deep geological radioactive waste repositories depends critically on radionuclide migration through engineered barrier systems. This study proposes the Stability-Driven Iterative Method (SDIM), an innovative analytical approach for robust and efficient parameter estimation in through-diffusion experiments. SDIM employs real-time, data-driven fitting throughout the experimental timeline to simultaneously determine the effective diffusion coefficient, distribution coefficient, and accessible porosity, thus decoupling diffusion from sorption and exclusion effects. SDIM, implemented via commonly available spreadsheet tools, enables continuous monitoring and optimization of experiment duration based on strict convergence criteria. Case studies of cation and anion diffusion in compacted bentonite show that SDIM significantly reduces experimental uncertainty, shortens run times, and provides more accurate parameter estimation than traditional methods. For anions, SDIM uniquely quantifies accessible porosity, thus revealing significant exclusion effects in certain bentonite types. This advancement not only increases the reliability of safety assessment but also enables more efficient experimental design for radioactive waste management, significantly reducing experimental duration and resource consumption.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107913"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Atmospheric particulate dispersion over complex terrain: Plume trajectory and model optimization","authors":"Deyi Chen ,&nbsp;Xiuhuan Tang ,&nbsp;Longbo Liu ,&nbsp;Zhiming Li ,&nbsp;Dezhong Wang ,&nbsp;Baojie Nie","doi":"10.1016/j.jenvrad.2026.107925","DOIUrl":"10.1016/j.jenvrad.2026.107925","url":null,"abstract":"<div><div>Atmospheric dispersion behavior of radioactive particles from nuclear facilities has attracted widespread attention due to their profound impacts on the environment and public health. The spatial variation of radioactive particle distribution could be mainly attributed to complex terrain. A simplification of complex terrain into idealized two-dimensional ridges and three-dimensional hills is a common methodological approach for investigating terrain effects. Here, an integrated approach employing both wind tunnel experiments and Computational Fluid Dynamics (CFD) simulations was used to investigate radioactive particulate dispersion trajectories over these typical idealized terrains. Key parameters, such as dimensions, types of terrain, release heights and positions of pollutants, were systematically varied. A comprehensive wind tunnel dataset was established using laser-sheet visualization to enrich high-fidelity validation data for particle dispersion model. Furthermore, the wind tunnel results indicated that the two-dimensional ridge enhanced plume rise relative to flat terrain, with the magnitude of enhancement dependent on its location and height. Conversely, lateral flow around the three-dimensional hill mitigated its influence on the plume trajectory, leading to negligible sensitivity to the hill height. However, large hills significantly blocked particle dispersion, resulting in a concentration decrease in the downwind area. Additionally, a higher release height and greater distance from the source diminished the influence of the complex terrain. In the CFD simulations, discrepancy of particle concentration was observed over the two-dimensional ridge when using various turbulent and dispersion model constants derived for flat terrain. A set of turbulent and dispersion constants of the CFD model (C_1ε, C_2ε, σ_k, σ_ε, C_μ and c_L) was optimized for application to complex terrain through validation against wind tunnel experimental data. The optimized values are 1.5, 1.92, 1.67, 3.25, 0.09 and 0.2, respectively.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107925"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Structural and isotopic peculiarities of a Сhernobyl fuel “hot” particle","authors":"Tatiana Poliakova ,&nbsp;Irina Vlasova ,&nbsp;Andrey Shiryaev ,&nbsp;Natalia Kuzmenkova ,&nbsp;Sergey Kalinichenko ,&nbsp;Alexander Nikitin ,&nbsp;Vasiliy Yapaskurt ,&nbsp;Vladimir Artemov ,&nbsp;Eugenia Chereslenko ,&nbsp;Alexander Trigub ,&nbsp;David Bottomley ,&nbsp;Stepan Kalmykov","doi":"10.1016/j.jenvrad.2026.107926","DOIUrl":"10.1016/j.jenvrad.2026.107926","url":null,"abstract":"<div><div>A fuel “hot” particle released during the accident at Chernobyl NPP in 1986 was collected in 2021 in a peat-bog soil 14.5 km to the north from the source. The particle was dissected by a focused ion beam, enabling observation of internal features. Scanning Electron microscopy reveals distinct morphological differences between external and internal pores, highlighting the influence of environmental conditions on surface degradation. X-ray absorption spectrum indicates that the particle maintains U(IV) oxidation state. TOF-SIMS investigation allowed precise determination of U isotopic ratio; calculated burn-up value is 15.2 MWd/kg(U). The measured U and Pu isotopic ratio are well correlated with the available literature data for Chernobyl-related samples and for RBMK fuel in general. The examined particle largely retained its structural integrity and U(IV) oxidation state after 35 years of environmental exposure, demonstrating considerable resistance against degradation.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107926"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146213400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"228Ra/226Ra isotopic ratios in groundwater from selected aquifers in Jordan and relationship with geological formations","authors":"Ahmad Hussein Alomari ,&nbsp;Fernando P. Carvalho ,&nbsp;Muneer Aziz Saleh ,&nbsp;Suhairul Hashim ,&nbsp;Amal Alsayaheen ,&nbsp;Refaat BaniKhalaf ,&nbsp;Alaa Jaffal ,&nbsp;Salah Alnjadat ,&nbsp;Amjed Hijjawi ,&nbsp;Amani Sharaf ,&nbsp;Mohammad Abu Salha ,&nbsp;Nasser Saud Alsabahi","doi":"10.1016/j.jenvrad.2026.107937","DOIUrl":"10.1016/j.jenvrad.2026.107937","url":null,"abstract":"<div><div>Water samples were collected from selected productive aquifers in Jordan to examine the influence of geological formations on the activity concentrations of ²²⁶Ra and ²²⁸Ra in groundwater and to determine the annual effective dose to water consumers due to ²²⁶Ra and ²²⁸Ra intake with water. The highest mean activity concentrations of ²²⁶Ra and ²²⁸Ra isotopes were determined in groundwater from the Cambrian-Ordovician formation with 0.318 ± 0.010 Bq L⁻¹ and 0.628 ± 0.012 Bq L⁻¹, respectively. The lowest mean activity concentration for ²²⁶Ra, 0.076 ± 0.011 Bq L⁻¹, was determined in groundwater from the Lower Cretaceous geological formation, while the lowest mean activity concentrations for ²²⁸Ra, &lt;0.080 Bq L⁻¹ (MDA), was determined in groundwater from the Tertiary geological formation. The influence of geological formation on ²²⁶Ra and ²²⁸Ra activity concentrations in groundwater was investigated using the analysis of variance (ANOVA). The results revealed a significant influence of geological formations on ²²⁶Ra and ²²⁸Ra activity concentrations in groundwater. Furthermore, the consumption of groundwater from these geological formations may exceed the annual effective radiation dose limit recommended by WHO (0.1 mSv y⁻¹), but that dose still is below the Jordanian limits of radiation dose from drinking water (0.5 mSv y⁻¹) tolerated for members of the public. The overall results of this study enabled to fingerprint groundwater from several geological formations and may serve as a baseline of ²²⁶Ra and ²²⁸Ra activity concentrations in groundwater. This will allow detecting anthropogenic contamination and/or modification of the geochemical conditions in aquifers with an impact on water quality.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107937"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147348468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Uranium disequilibrium in groundwater downgradient of the Bayan Obo rare earth tailings, Northwest China","authors":"Xiang Huang","doi":"10.1016/j.jenvrad.2026.107917","DOIUrl":"10.1016/j.jenvrad.2026.107917","url":null,"abstract":"<div><div>Understanding uranium isotopic disequilibrium in groundwater is critical for tracing solute transport and assessing long-term contamination risks in mining-impacted regions worldwide. This study combines hydrogeochemical and U-series isotope analyses (²³⁴U/²³⁸U, ²³⁰Th/²³²Th, ²²⁶Ra) along a typical flow transect downgradient of the Bayan Obo rare earth tailings pond to elucidate uranium mobility and mixing processes. Dissolved uranium shows consistent ²³⁴U enrichment, with a strong linear covariance between uranium concentration and activity ratio (R² = 0.87, p = 0.002), indicating conservative binary mixing between tailings-impacted and regional groundwater. Spatial declines in ²³⁴U/²³⁸U and ²³⁴U-excess reveal isotopic homogenization and dilution along the flow path, whereas Th and Ra isotope behaviors might be primarily controlled by surface retention (e.g., Fe/Mn(hydro)oxides) and salinization, respectively. Mass-balance analysis suggests that groundwater contributes approximately 8% of the river flow, carrying a small but traceable uranium flux. These results demonstrate the diagnostic value of U-series disequilibria for quantifying water-rock interactions and groundwater flow dynamics in mining-impacted environments.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107917"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}