Journal of environmental radioactivity最新文献

{"title":"Determination of transfer factors for 90Sr and stable Sr from soil to plants in semi-arid regions of Türkiye","authors":"Nihal Kaya,&nbsp;Mihriban Şahin,&nbsp;Eren Çantay,&nbsp;Abdullah Dirican,&nbsp;Namık Kemal Şahin","doi":"10.1016/j.jenvrad.2026.107935","DOIUrl":"10.1016/j.jenvrad.2026.107935","url":null,"abstract":"<div><div>This study quantifies and compares soil-to-plant transfer factors (F_v) for ⁹⁰Sr with stable Sr isotopes in two semi-arid agricultural regions of Türkiye. Paired soil and crop samples (wheat, barley, clover, purslane, apple, apricot and tomato) were collected from the Sivrihisar NORM area and some parts of Iğdır agricultural areas located within an NPP emergency protective action zone. ⁹⁰Sr activity concentrations was measured by low-level proportional counter, whereas stable Sr was quantified by ICP-MS. Transfer factors (F_v) were derived as concentration ratios. Results indicate a significant correlation between stable Sr and ⁹⁰Sr concentrations of plants (R = 0.89, p &lt; 0.05). For soil, no significant correlation observed between stable Sr and ⁹⁰Sr (R = 0.42, p &gt; 0.05). The stable Sr and ⁹⁰Sr concentrations and F_v,Sr values of the stems were determined to be higher than those of the grains, the opposite was observed for tomato and wheat. These findings provide essential baseline parameters for environmental impact assessment and emergency food-chain modelling in semi-arid climates.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107935"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147306757","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":"Thermally activated recycled pottery waste as a porous aluminosilicate sorbent for efficient Uranium(VI) removal from aqueous systems","authors":"Amir A. Elzoghby ,&nbsp;Hager Fahmy ,&nbsp;Osama E. Roshdy ,&nbsp;Ahmed M. Masoud ,&nbsp;Ahmed M. Ismail ,&nbsp;Mohamed H. Taha ,&nbsp;Saber Ibrahim","doi":"10.1016/j.jenvrad.2026.107933","DOIUrl":"10.1016/j.jenvrad.2026.107933","url":null,"abstract":"<div><div>The sustainable management of radioactive wastewater requires low-cost and eco-friendly materials capable of efficiently removing U(VI) from aqueous systems. In this work, recycled pottery waste, a ubiquitous aluminosilicate by-product, was thermally activated at 550, 650, and 750 °C to produce novel sorbents (RP1–RP3) for U(VI) adsorption. The materials were comprehensively characterized by XRD, SEM–EDS, BET, DLS, zeta potential, and FTIR to elucidate structural and surface modifications induced by calcination. The results revealed a progressive improvement in crystallinity, porosity, and surface charge with temperature, culminating in RP3 (750 °C) exhibiting the highest surface area (34.35 m² g⁻¹) and most negative zeta potential (−38.46 mV). Batch adsorption studies demonstrated that U(VI) removal strongly depended on pH, sorbent dose, and contact time, with optimal uptake achieved at pH ≈ 4. The adsorption followed pseudo-second-order kinetics and was best fitted by the Langmuir and Sips isotherm models, confirming monolayer chemisorption on homogeneous active sites. The maximum adsorption capacities reached 49.5 mg g⁻¹ for RP3, while thermodynamic parameters indicated a spontaneous, endothermic, and entropy-driven process. Mechanistic interpretation supported a multi-step pathway involving electrostatic attraction, surface complexation, and intraparticle diffusion. RP3 exhibited excellent reusability, maintaining &gt;87% adsorption efficiency after five cycles using H₂SO₄ as an effective desorbing agent. When tested with real radioactive wastewater, RP3 achieved a 74.2% U(VI) removal efficiency despite competing ions, confirming its high selectivity and structural stability. This study establishes thermally activated recycled pottery as a cost-effective, reusable, and environmentally sustainable sorbent for uranium (VI) remediation, integrating waste valorization with Radioprotection.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107933"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147306699","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":"Radon exhalation and migration mechanisms across stratigraphic units: a case study from Inner Mongolia","authors":"Pengda Ma ,&nbsp;Qiang Sun ,&nbsp;Jishi Geng ,&nbsp;Jianjun Hu ,&nbsp;Lei Xue ,&nbsp;Nie Wen ,&nbsp;Chao Lyu ,&nbsp;Wei Wang ,&nbsp;Songrui Jie ,&nbsp;Zetang Wang","doi":"10.1016/j.jenvrad.2026.107934","DOIUrl":"10.1016/j.jenvrad.2026.107934","url":null,"abstract":"<div><div>Radon (²²²Rn) is a useful tracer for concealed fractures and subsurface heterogeneity. Using LTNA pore characterization and sealed-chamber exhalation tests on drill cores from a coal-mining area in Inner Mongolia, we observe a pronounced vertical zonation in pore volume (low in shallow clay-rich strata, higher in the middle transition zone, and reduced at depth) with stepwise shifts across lithologic boundaries. Radon exhalation exhibits an increase–then–decrease trend with depth, rising from 1.1 to 4.5 Bq·kg⁻¹·h⁻¹ to a peak of ∼7.6 Bq·kg⁻¹·h⁻¹ and then declining to ∼3.1–5.1 Bq·kg⁻¹·h⁻¹ in deeper mudstone. Exhalation correlates strongly with total pore volume (R² ≈ 0.95) and mesopore volume (2–50 nm; R² ≈ 0.98), suggesting that mesopores primarily reflect matrix-accessible pore space and diffusion supply at the core scale. Moisture-conditioning tests reveal an inverted-U response, confirming that water content modulates radon release by pore occupancy and gas-phase diffusion. These results support the use of radon anomalies to delineate high-permeability pathways and potential concealed fractures in coal-bearing strata.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107934"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147306727","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":"Decadal shift in the decreasing trends of radiocesium concentrations in demersal fishes off Fukushima","authors":"Yosuke Amano ,&nbsp;Shotaro Suzuki ,&nbsp;Hyoe Takata ,&nbsp;Kei Sakamoto ,&nbsp;Akira Matsumoto ,&nbsp;Takashi Iwasaki ,&nbsp;Yoshiaki Morioka ,&nbsp;Kyoichi Kamiyama ,&nbsp;Toyohiko Hirata ,&nbsp;Kazuyoshi Takasaki ,&nbsp;Hideki Kaeriyama ,&nbsp;Takami Morita ,&nbsp;Toshihiro Wada","doi":"10.1016/j.jenvrad.2026.107904","DOIUrl":"10.1016/j.jenvrad.2026.107904","url":null,"abstract":"<div><div>Better understanding of the decreasing trends of radiocesium (¹³⁴Cs and ¹³⁷Cs) in marine products is required to facilitate the restoration of coastal fisheries and prevent harmful rumors in Fukushima Prefecture. In this study, we measured the radiocesium concentrations of seven demersal fish species (fat greenling <em>Hexagrammos otakii</em>, Japanese flounder <em>Paralichthys olivaceus</em>, Japanese rockfish <em>Sebastes cheni</em>, marbled flounder <em>Pseudopleuronectes yokohamae</em>, Pacific cod <em>Gadus macrocephalus</em>, slime flounder <em>Microstomus achne</em>, willowy flounder <em>Tanakius kitaharai</em>) caught off the coast of Fukushima Prefecture during the period 2011–2020 (<em>n</em> = 10199). ¹³⁷Cs concentrations were determined in all samples collected between April 2018 and September 2020. The long-term trends of ¹³⁷Cs concentrations exhibited a significant decrease in all species from 2011 to 2020. However, single-component and two-component exponential model fitting demonstrated that the decreasing trends in five species (i.e., fat greenling, Japanese flounder, Japanese rockfish, Pacific cod, and willowy flounder) were better described by a two-component exponential model. In these five species, the ecological half-lives (<em>T</em>_<em>eco</em>) of the second component of the two-component exponential model (729–1034 days) were much longer than those of the first component (16–396 days). In addition, specific relationships were observed between ¹³⁷Cs concentrations and the collection area, depth, and fish size in the respective species collected during the period 2018–2020. These results indicate that the decreasing trends of ¹³⁷Cs concentrations in some demersal fishes have slowed, and that demersal fishes are still influenced by slightly elevated radiocesium levels in coastal areas, reflecting the ecological characteristics of each species.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107904"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146180553","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":"Study on the radon gas transmission rate in overburden rock under the influence of coal spontaneous combustion","authors":"Kaili Dong ,&nbsp;Xiaoyuan Liu ,&nbsp;Zhifan Lu ,&nbsp;Junfeng Wang","doi":"10.1016/j.jenvrad.2026.107930","DOIUrl":"10.1016/j.jenvrad.2026.107930","url":null,"abstract":"<div><div>In the field of coal mine safety, radon detection technology is mainly used to identify the sources of coal spontaneous combustion (CSC) fires. Here, a method for calculating the rate of transmission of radon gas in the rock layer overlying the CSC region is proposed. The radon transmission rate in rock as a function of temperature was investigated through laboratory-scale experiments. In addition, numerical simulations were carried out in COMSOL to calculate the changes in the radon concentration and radon transmission rate in the overlying rock layer after 30, 60, and 85 days of CSC. Finally, field experiments were conducted by drilling samples at different locations in the mine site and analyzing the levels of radon daughter nuclei present. The results show that radon release peaks at 250 °C, reaching 3.1-3.9 times the value at 30 °C. Simulated peak radon transmission rates after 60 and 85 days of CSC are 52.7% and 40.8% higher, respectively, than after 30 days. Field-measured average transmission rates in fire zones are 42.8%-50.5% higher than in the non-fire zone. A previously unreported nonlinear profile of radon transmission rate with distance is revealed: the rate increases sharply to a peak from the fire source, then gradually declines and stabilizes. The enhancement effect of CSC weakens with increasing distance. Porosity variations at layer interfaces induce only minor fluctuations in transmission rate. The results of this study can help to improve the current understanding of the mechanism of long-distance radon transmission in rock formations and guide the accurate application of radon detection technology in the field.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107930"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146258222","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":"Eastern European peatlands as living archives of anthropogenic pollution: Insights of 210Pb dating","authors":"Róbert-Csaba Begy ,&nbsp;Anita Bozsik ,&nbsp;Piotr Szwarczewski ,&nbsp;Jonas Mazeika ,&nbsp;Spassimir Tonkov ,&nbsp;Claudiu Tănăselia ,&nbsp;Jovana Nikolov","doi":"10.1016/j.jenvrad.2026.107927","DOIUrl":"10.1016/j.jenvrad.2026.107927","url":null,"abstract":"<div><div>Peatlands serve as high-resolution archives of past atmospheric deposition, facilitating the reconstruction of heavy metal pollution histories across various anthropogenic contexts. In this study, peat cores from Bulgaria, Lithuania, Poland, Serbia, and Romania were analyzed to assess spatiotemporal variations in lead (Pb), zinc (Zn), and associated trace metals (Cu, Cr, Sr, Ba) in relation to industrialization, mining, and urban activity. Chronologies were developed using the ²¹⁰Pb dating method based on gamma spectrometry measurements, while elemental concentrations were determined via X-ray fluorescence (XRF) analysis.</div><div>Our results reveal consistent Pb enrichment across all sites beginning in the late 18th–19th centuries, reflecting the combined influence of early industrialization, mining, and later the introduction of leaded gasoline. Maximum Pb concentrations varied regionally, reaching up to 1200 mg/kg in Romanian mining areas, compared to &lt;200 mg/kg near urban centers. The post-2000 decline in Pb coincides with national bans on leaded petrol (2001–2007), although background values remain elevated in urban-adjacent bogs due to additional industrial sources. Copper, strontium, and barium show parallel enrichments in areas influenced by mining and combustion-related activities, particularly near the Jiu Valley coal basin and metallurgical regions of Romania and Serbia. Arsenic, detected in selected Lithuanian profiles, displays concentration peaks aligned with industrial development but declines in the youngest layers, mirroring Pb behavior.</div><div>These findings highlight the dual role of peatlands as sensitive archives of regional anthropogenic pollution and as dynamic systems affected by internal geochemical cycling. The integration of multiple cores across Eastern Europe underscores both common trajectories of Pb decline following regulatory actions and heterogeneous Zn behavior linked to local industrial legacies.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107927"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146258260","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 two-stage gradient boosting framework coupled with Lagrangian particle tracking for rapid atmospheric radionuclide dispersion prediction in nuclear emergency response","authors":"Jinjie Zhao ,&nbsp;Xilong Tong","doi":"10.1016/j.jenvrad.2026.107936","DOIUrl":"10.1016/j.jenvrad.2026.107936","url":null,"abstract":"<div><div>Predicting the atmospheric dispersion of radionuclides is central to nuclear emergency response, yet any useful prediction tool must balance physical fidelity against the speed that real-time decision-making demands. This trade-off is particularly challenging under non-stationary meteorological conditions, where shifting winds produce complex plume geometries that steady-state models cannot adequately represent. In this paper, we develop a lightweight two-stage gradient boosting (TS-GB) surrogate coupled with Lagrangian particle tracking for rapid concentration-field prediction over dispersion scales of 50 km on flat terrain. Unlike deep-learning surrogates, the framework requires only modest training data and no specialized hardware. Training data are generated by a Lagrangian Stochastic Particle Model (LSPM), which shares its governing equations with FLEXPART, NAME, and HYSPLIT, across 78 meteorological scenarios derived from the Shenzhen National Basic Meteorological Station. Because concentration fields are inherently sparse (zero-to-non-zero ratios up to 19:1), the framework separates zero-region classification from concentration regression, achieving R² = 0.996 and a zero-class F1 of 99.2% under steady-state conditions. A cohort-based temporal decomposition then extends the framework to non-stationary wind fields without retraining. Under cumulative wind-direction changes up to 726°, the surrogate maintains R² &gt; 0.93, whereas the Gaussian Plume baseline yields R² &lt; 0 under the same conditions. Residual errors concentrate along the low-concentration plume periphery and do not propagate into emergency decisions: when predicted concentrations are converted to ambient γ dose rates and classified against Operational Intervention Level (OIL) thresholds, decision consistency exceeds 98.9%, with zero missed detections under moderate and high release intensities. Prediction time is reduced from approximately 29 min to under 0.4 s, making the surrogate suitable for real-time emergency risk zoning.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107936"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147321704","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":"Interaction between radon progeny and particulate matter in an urban environment","authors":"Mohammad Alem Sultani,&nbsp;Martin Bulko,&nbsp;Monika Müllerová,&nbsp;Jozef Masarik,&nbsp;Terézia Eckertová","doi":"10.1016/j.jenvrad.2026.107918","DOIUrl":"10.1016/j.jenvrad.2026.107918","url":null,"abstract":"<div><div>Atmospheric radon progeny and particulate matter (PM) pose significant environmental health risks, yet their interactions and co-variability remain poorly quantified. This study investigates the interplay between short-lived outdoor radon progeny and ambient particulate matter (PM10 and PM2.5) under urban conditions in Bratislava, Slovakia. Continuous measurements of radon progeny, PM levels, boundary layer height and meteorological observations obtained over a period of three years were analysed. To characterize the relationships among variables, a hierarchy of statistical and machine learning approaches was applied, including principal component analysis, multiple linear regression (MLR), generalised additive model (GAM), random forest (RF) and XGBoost. All models identified PM as the dominant predictor of equilibrium-equivalent radon concentration (EEC), with a clear positive association between them. A nonlinear relationship was observed between EEC and PM concentration, with EEC increasing sharply with PM levels (i.e., by more than a factor of two across the observed PM range), before reaching a plateau. The RF achieved the highest predictive accuracy (R² = 0.72), substantially outperforming GAM (R² = 0.49) and MLR (R² = 0.43). These results demonstrate that PM concentration has a significant impact on attached radon progeny in the atmosphere, which are further modulated by meteorological factors. Overall, this study underscores the need for flexible nonlinear modelling to capture complex radon–PM dynamics and highlights the importance of aerosol interactions in radiation dose assessment.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"294 ","pages":"Article 107918"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135654","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":"Study on the release pattern of radon exhalation in the overburden soil of uranium tailings under arid climate and prediction based on Fully Connected Neural Network (FCNN)-based deep learning radon prediction model","authors":"Xianwei Wu ,&nbsp;Yifan Chen ,&nbsp;Dongying Lin ,&nbsp;Shijie Fang ,&nbsp;Le Xiao ,&nbsp;Chengyan Yan ,&nbsp;Yong Liu","doi":"10.1016/j.jenvrad.2025.107883","DOIUrl":"10.1016/j.jenvrad.2025.107883","url":null,"abstract":"<div><div>Predicting radon exhalation rate under high-temperature and sun-exposure conditions has always been a challenging issue for uranium tailings management units, involving the coupled effects of three important factors: temperature, humidity, and fractures rate. Under arid climate conditions, a series of indoor simulation experiments with different temperatures were conducted on the covering soil of uranium tailings. The Fully Connected Neural Network (FCNN)-based deep learning radon prediction model was proposed, and through error comparison with the Long Short-Term Memory (LSTM) model, the FCNN-based deep learning radon prediction model model demonstrated a better ability to reflect the laws of radon gas release and could more accurately express the relationships between temperature, soil moisture content, the overburden fractures rate, and radon exhalation rate. This paper provides a feasible prediction method for radon control and prevention in uranium tailings.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"293 ","pages":"Article 107883"},"PeriodicalIF":2.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023708","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 study on the impact of meteorological factors on radioactive fallout predictions of nuclear explosions","authors":"Feifei Li,&nbsp;Qiang Liu,&nbsp;Wei Liu,&nbsp;Zhaoru He,&nbsp;Ming Yang,&nbsp;Yangchao Li","doi":"10.1016/j.jenvrad.2026.107895","DOIUrl":"10.1016/j.jenvrad.2026.107895","url":null,"abstract":"<div><div>By designing several sets of sensitivity experiments with varying meteorological factors, this study investigates the influence of precipitation and wind speed variations on the radioactive fallout predictions based on the WRF-NAQPMS nuclear explosion radioactive fallout prediction model with its flexible meteorological data interface module. The results indicate that in the high precipitation scenario, although the instantons ground dose rate decreases 1 h after explosion, the cumulative ground dose rate increases with increasing precipitation 12 h after explosion. The total ground fallout reaches saturation for refractory nuclides, but shows slowing growth trend for volatile nuclides as precipitation intensity increases. Variations in wind speed have a significant impact on both the ground and vertical distribution of dose rate. The ground dose rate increases with decreasing wind speed, the vertical range of altitude layers where radioactive materials accumulate increases, and the altitude at which the high-dose-rate regions occur decreases. Overall, the ground fallout field is most affected by wind speed quantitatively, with a shift in ground dose rate of up to 200.37 % occurring within 12 h after explosion. Within 1 h after explosion, the ground dose rate fluctuates between 3.82 % and 20.63 % due to precipitation variations.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"293 ","pages":"Article 107895"},"PeriodicalIF":2.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023709","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}