Journal of environmental radioactivity最新文献

Spatially resolved isotope analysis of a Chernobyl corium fragment extracted from environmental soil 从环境土壤中提取的切尔诺贝利堆芯碎片的空间分辨同位素分析

IF 1.9 3区环境科学与生态学

Journal of environmental radioactivity Pub Date : 2025-04-24 DOI: 10.1016/j.jenvrad.2025.107699

Wolfgang Schulz, Martin Weiss, Manuel Raiwa, Clemens Walther, Laura Leifermann

引用次数: 0

Soil to plant transfer factor of 137Cs, 40K, and stable Cs in a semi-arid region 半干旱区137Cs、40K和稳定Cs的土壤向植物转移因子

IF 1.9 3区环境科学与生态学

Journal of environmental radioactivity Pub Date : 2025-04-23 DOI: 10.1016/j.jenvrad.2025.107700

Abdullah Dirican, Hasan Dikmen, Eren Çantay

{"title":"Soil to plant transfer factor of 137Cs, 40K, and stable Cs in a semi-arid region","authors":"Abdullah Dirican, Hasan Dikmen, Eren Çantay","doi":"10.1016/j.jenvrad.2025.107700","DOIUrl":"10.1016/j.jenvrad.2025.107700","url":null,"abstract":"<div><div>Radionuclide transport from soil to plants is important for radiological contamination of food and estimation of internal radiation doses from consuming contaminated food. Wheat, clover, purslane and soil samples were collected from agricultural fields in the semi-arid region of Iğdır, Türkiye. The concentrations of <sup>137</sup>Cs, <sup>40</sup>K, and stable Cs were measured and soil-to-plant transfer factors were calculated. The concentrations of <sup>137</sup>Cs (derived from global fallout deposition), <sup>40</sup>K and stable Cs in soils ranged from 1.9 to 8.4 Bq kg<sup>−1</sup>, 318–2033 Bq kg<sup>−1</sup> and 1.6–18.5 mg kg<sup>−1</sup> respectively. The geometric mean concentrations of <sup>137</sup>Cs, <sup>40</sup>K and stable Cs in wheat grain were measured as 8.4 Bq kg<sup>−1</sup> dry wt., 417 Bq kg<sup>−1</sup> dry wt. and 3.6 mg kg<sup>−1</sup> dry wt. respectively. Geometric mean value of the soil to stem of cereal (wheat), grass (clover) and leafy vegetable (purslane) transfer factor (F<sub>ν</sub>) for <sup>137</sup>Cs were estimated as 5.7 x 10<sup>−2</sup>, 2.8 x 10<sup>−2</sup> and 9.2 x 10<sup>−2</sup> which were higher than values reported in IAEA-TRS 472 except grain of wheat which was approximately equal to that of temperate climate values 1.1 x 10<sup>−1</sup>. The F<sub>ν</sub> values of stable Cs were estimated somewhat lower than that of F<sub>ν</sub> of <sup>137</sup>Cs for wheat grain, wheat stems, clover and purslane.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"286 ","pages":"Article 107700"},"PeriodicalIF":1.9,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859726","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}

引用次数: 0

Long-term trends of radiocaesium concentrations in moose (Alces alces) harvested in Sweden 在瑞典收获的驼鹿（Alces Alces）放射性铯浓度的长期趋势

IF 1.9 3区环境科学与生态学

Journal of environmental radioactivity Pub Date : 2025-04-23 DOI: 10.1016/j.jenvrad.2025.107696

Robert N. Weimer , Synnöve Sundell-Bergman , Lars Sonesten , Camilla Wikenros , Klas Rosén

{"title":"Long-term trends of radiocaesium concentrations in moose (Alces alces) harvested in Sweden","authors":"Robert N. Weimer , Synnöve Sundell-Bergman , Lars Sonesten , Camilla Wikenros , Klas Rosén","doi":"10.1016/j.jenvrad.2025.107696","DOIUrl":"10.1016/j.jenvrad.2025.107696","url":null,"abstract":"<div><div>This paper describes an analysis of data from long-term monitoring (28 years) of <sup>137</sup>Cs activity concentrations in muscle tissue from moose (<em>Alces alces</em>) harvested in east-central Sweden. Two data sets on activity concentrations in moose muscle samples from the adjacent municipalities of Heby (n = 3652; y 1986–2012) and Gävle (n = 11,511; y 1986–2008) were used. Geometric means of <sup>137</sup>Cs activity concentrations in moose have declined from 700 Bq kg<sup>−1</sup> in Heby and 1300 Bq kg<sup>−1</sup> in Gävle during 1986–1989 to around 300 Bq kg<sup>−1</sup> in Heby (2009–2012) and 700 Bq kg<sup>−1</sup> in Gävle (2005–2008). Based on annual geometric mean values of <sup>137</sup>Cs in the muscle samples, the effective ecological half-life of <sup>137</sup>Cs was calculated to be 16 years in both Heby and Gävle. The average <sup>137</sup>Cs activity concentrations in moose calves were 14 % higher in Heby and 18 % higher in Gävle compared to adults. No sex-specific difference in activity concentration was found. Mean aggregated transfer factors (T<sub>ag</sub>) from soil to moose muscle tissue were calculated at 0.016 m<sup>2</sup> kg<sup>−1</sup> (range 0.010–0.036) in the Heby area and 0.023 m<sup>2</sup> kg<sup>−1</sup> (range 0.013–0.035) in the Gävle area. Using GIS software, mean deposition within a 1.7 km radius around each killing spot for moose harvested in Heby was calculated, resulting in individual T<sub>ag</sub> values. On an individual level, this resulted in a minimum T<sub>ag</sub> of 0.001 m<sup>2</sup> kg<sup>−1</sup> and a maximum T<sub>ag</sub> of 0.104 m<sup>2</sup> kg<sup>−1</sup>, distinctly reflecting the high variation of <sup>137</sup>Cs concentrations in moose. The proportion of samples exceeding the national intervention limit of 1500 Bq kg<sup>−1</sup> was 5 % in Heby and 25 % in Gävle during the study period.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"286 ","pages":"Article 107696"},"PeriodicalIF":1.9,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859727","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}

引用次数: 0

Treatment of low-concentration uranium-containing wastewater utilizing Scenedesmus sp. with an emphasis on response surface methodology 利用Scenedesmus sp处理低浓度含铀废水，重点是响应面法

IF 1.9 3区环境科学与生态学

Journal of environmental radioactivity Pub Date : 2025-04-18 DOI: 10.1016/j.jenvrad.2025.107694

Maryam Ranjbar Safiabad , Parisa Mohammadi , Parisa Tajer-Mohammad-Ghazvini

{"title":"Treatment of low-concentration uranium-containing wastewater utilizing Scenedesmus sp. with an emphasis on response surface methodology","authors":"Maryam Ranjbar Safiabad , Parisa Mohammadi , Parisa Tajer-Mohammad-Ghazvini","doi":"10.1016/j.jenvrad.2025.107694","DOIUrl":"10.1016/j.jenvrad.2025.107694","url":null,"abstract":"<div><div>Microalgae possess various mechanisms to mitigate the toxicity of heavy metals. This study focused on the uranium removal potential of <em>Scenedesmus</em> sp. strain MTR 1901 from waters containing low concentrations of uranium contamination. Response surface methodology (RSM) utilizing central composite design through Design Expert software was employed to identify the key parameters and optimize factors such as pH, time, temperature, metal concentration, and biomass concentration in the process. The results revealed that uranium concentration, pH and time are statistically effective in uranium removal process. The removal efficiency improved from 14.36 % to 79.62 % when the pH was enhanced from 4 to 7.97 during the initial times. Additionally, as the uranium concentration increased from 1 mg to 5 mg/l, the removal efficiency declined from 100 % to 32.19 % in alkaline pH conditions. Increasing time from one to 96 h, the removal efficiency was decreased from 76.14 % to 61.24 %. The 1 g of the alga under the optimal condition (C<sub>0</sub> = 1.57 mg/l, pH 3.22, M = 1.31 g/l, T = 12.8 <sup>°</sup>C, Time = 53 h) can remove 1190 μg of uranium with an absorption efficiency of 99.54 %. The findings indicate that strain MTR 1901 is a promising candidate for the phytoremediation of uranium in aquatic environments that are contaminated with low levels of uranium.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"286 ","pages":"Article 107694"},"PeriodicalIF":1.9,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842831","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}

引用次数: 0

Sorption experiments using stemflow: Reproduction and understanding of radiocesium dynamics on the forest floor during the early stage after the Fukushima nuclear accident 茎流吸附实验：福岛核事故初期森林地面放射性元素动态的再现和理解

IF 1.9 3区环境科学与生态学

Journal of environmental radioactivity Pub Date : 2025-04-18 DOI: 10.1016/j.jenvrad.2025.107695

Takuya Manaka , Shinta Ohashi , Wataru Sakashita , Naohiro Imamura , Yoshiyuki Inagaki

{"title":"Sorption experiments using stemflow: Reproduction and understanding of radiocesium dynamics on the forest floor during the early stage after the Fukushima nuclear accident","authors":"Takuya Manaka , Shinta Ohashi , Wataru Sakashita , Naohiro Imamura , Yoshiyuki Inagaki","doi":"10.1016/j.jenvrad.2025.107695","DOIUrl":"10.1016/j.jenvrad.2025.107695","url":null,"abstract":"<div><div>The Fukushima Dai-ichi Nuclear Power Plant accident on March 11, 2011 released significant amounts of radiocesium (<sup>137</sup>Cs), which contaminated large forested areas in Fukushima, with large spatial heterogeneity. To understand the characteristics of <sup>137</sup>Cs sorption to outer bark and fresh plant residues on the forest floor, mainly in the Oi horizon, we performed sorption experiments in the laboratory. To simulate actual conditions, we used <sup>137</sup>Cs-free organic matter samples from Kochi, far from the power plant, and <sup>137</sup>Cs-containing stemflow samples from Fukushima. <sup>137</sup>Cs sorption was highest in the outer bark of Japanese cedar (<em>Cryptomeria japonica</em>) (on average 76.1%) and in the Oi horizon (72.8%), followed by fallen leaves of Konara oak (<em>Quercus serrata</em>) (45.5%), fallen branches of Japanese cedar (37.6%), and fallen needles of Japanese cedar (27.4%). We discuss various factors controlling <sup>137</sup>Cs sorption characteristics, such as organic chemical contents and sample size, and the chemical composition of the stemflow sample. Shortly after the accident, when most of the <sup>137</sup>Cs in the forest ecosystem was trapped in the O horizon and the forest canopy, the sorption characteristics of the materials would have influenced the horizontal heterogeneity of <sup>137</sup>Cs in the Oi horizon under the actual conditions on the forest floor.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"286 ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842832","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}

引用次数: 0

Prediction methodology of air absorbed dose rates for Chinese cities with deep learning models 基于深度学习模型的中国城市空气吸收剂量率预测方法

IF 1.9 3区环境科学与生态学

Journal of environmental radioactivity Pub Date : 2025-04-16 DOI: 10.1016/j.jenvrad.2025.107685

Chong Guo , Xiaoyu Li , Zhihui Yan , Lekang Chen , Bing Tang , Wenjie Zeng

{"title":"Prediction methodology of air absorbed dose rates for Chinese cities with deep learning models","authors":"Chong Guo , Xiaoyu Li , Zhihui Yan , Lekang Chen , Bing Tang , Wenjie Zeng","doi":"10.1016/j.jenvrad.2025.107685","DOIUrl":"10.1016/j.jenvrad.2025.107685","url":null,"abstract":"<div><div>Air absorbed dose rate is a key indicator of environmental radiation exposure. In China, automated environmental radiation monitoring systems have been established in multiple cities to continuously measure air absorbed dose rates. Nevertheless, developing effective preventive strategies based solely on data monitoring remains challenging. To address the issue, this study proposes a prediction framework for urban air absorbed dose rates based on historical data. The framework encompasses model construction, data preprocessing, outcome evaluation and prediction of future data. Specifically, three deep learning models—Long Short-Term Memory (LSTM), Convolutional Neural Network-Long Short-Term Memory (CNN-LSTM), and Bidirectional Long Short-Term Memory (Bi-LSTM)—were employed to develop prediction methods for urban air absorbed dose rates. Given the large and complex dataset structure of air absorbed dose rates reports released by the National Nuclear Safety Administration, a Convolutional Neural Network (CNN) was utilized to extract monitoring data, significantly improving data preprocessing efficiency. Missing values were handled using Lagrange interpolation method. The results showed that the Bi-LSTM model performed best in terms of coefficient of determination (R<sup>2</sup>), mean absolute error (MAE) and root mean square error (RMSE) when predicting the air absorbed dose rates in a coastal city. When predicting the air absorbed dose rates in an inland city, the R<sup>2</sup> and RMSE indices of the Bi-LSTM model are more accurate, although the MAE value of the Bi-LSTM model is slightly higher than that of the LSTM model. To summarize, the Bi-LSTM model is more effective in predicting the air absorbed dose rates in Chinese cities.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"286 ","pages":"Article 107685"},"PeriodicalIF":1.9,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838818","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}

引用次数: 0

Public dose assessment for Yangjiang nuclear power plant effluents: A multi-media numerical model of tritium transport in the South China sea 阳江核电站污水公众剂量评估：南海氚运移的多媒体数值模型

IF 1.9 3区环境科学与生态学

Journal of environmental radioactivity Pub Date : 2025-04-08 DOI: 10.1016/j.jenvrad.2025.107684

Junyang Zeng , Lili Li , Yingzhe Du , Ziliang Hou , Youting Wu , Shiying Li , Hanyu Wu , Zhihao Liu , Peng Lin , Muyi Ni , Xiajie Liu

{"title":"Public dose assessment for Yangjiang nuclear power plant effluents: A multi-media numerical model of tritium transport in the South China sea","authors":"Junyang Zeng , Lili Li , Yingzhe Du , Ziliang Hou , Youting Wu , Shiying Li , Hanyu Wu , Zhihao Liu , Peng Lin , Muyi Ni , Xiajie Liu","doi":"10.1016/j.jenvrad.2025.107684","DOIUrl":"10.1016/j.jenvrad.2025.107684","url":null,"abstract":"<div><div>Periodic discharges from nuclear power plant (NPP) influence tritium background levels in seawater. After the Fukushima nuclear accident, radioactive wastewater discharges have introduced substantial amounts of tritium into the ocean. These events potentially threaten marine ecosystems and human health. To overcome the limitations of existing models, such as incomplete media consideration and low precision, we developed the TrOSB model (Tritium Ocean-Sediment-Biota transport Model). This high-precision model comprehensively analyzes transport and transformation across multiple marine media, including transport in seawater, interactions with sediments, transfer through the food chain, and assessment of public dose risks from seafood consumption. Results indicate that during the quarterly discharges of the Yangjiang NPP from 2019 to 2021, tritium from effluents spread across the entire South China Sea within four months, showing distinct seasonal transport patterns. Tritium concentrations in sediments were approximately ten times lower than those in near-bottom waters, with no significant enrichment observed in sediments. Organically bound tritium (OBT), the form of tritium transferred through the food chain, was found to be enriched to a higher degree in fish than in molluscs and crustaceans. The dose assessment indicates that public health risks from tritium in Yangjiang NPP effluents are negligible.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"286 ","pages":"Article 107684"},"PeriodicalIF":1.9,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792493","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}

引用次数: 0

Spacial variation mapping of aerial TC, K, eU, and eTh data according to concentration number (C –N) fractal modeling approach of A sample area in Egypt- A case study 基于浓度数（C - n）分形建模方法的埃及某样区航拍TC、K、eU、eTh数据空间变异制图——以实例为例

IF 1.9 3区环境科学与生态学

Journal of environmental radioactivity Pub Date : 2025-04-08 DOI: 10.1016/j.jenvrad.2025.107679

Mohamed A. El-Sadek

{"title":"Spacial variation mapping of aerial TC, K, eU, and eTh data according to concentration number (C –N) fractal modeling approach of A sample area in Egypt- A case study","authors":"Mohamed A. El-Sadek","doi":"10.1016/j.jenvrad.2025.107679","DOIUrl":"10.1016/j.jenvrad.2025.107679","url":null,"abstract":"<div><div>Geological interpretation and mapping-relying on existing airborne gamma-ray spectrometric data-were used to interpret from Gabal (Mountain) El-Bakriya area, Central Eastern Desert, Egypt. Log-log graphs and fractal concentration number (C-N) modeling technique were utilized to analyze the data and present them in various ways. Modeling according to C-N models removes the qualitative radioactive zones of TC, K, eU, and eTh. The lithological outcrops in the study area are then described in these qualitative radioactive zones. A geological map is created with C-N plots of TC, K, eU, and eTh to produce a comprehensive record of the radioactive signatures of all outcrops, which is tied to the radioactive signatures of K, which is the most well-known radioactive element for many rock formations. C-N fractal modeling shows great successes which perfectly simulate radioactive and lithological outcrop boundaries. The case study presented demonstrates the necessity of aerial gamma-ray spectrometry and fractal modeling for geological mapping and interpretation in difficult, and rocky terrains. The critical function in these situations is emphasized in this work. According to C-N fractal modeling of “K”, possibly indicating different cycles of granite eruption and formation in the study area. With the help of C-N model, radioactive break points can be created between rock types to indicate the transition from one lithology to another.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"286 ","pages":"Article 107679"},"PeriodicalIF":1.9,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792492","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}

引用次数: 0

Numerical simulation study on the radon exhalation mechanism of building walls influenced by coupled heat-moisture-air transfer 热-湿-风耦合传热对建筑墙体氡释放机理影响的数值模拟研究

IF 1.9 3区环境科学与生态学

Journal of environmental radioactivity Pub Date : 2025-03-31 DOI: 10.1016/j.jenvrad.2025.107675

Yuan-Chao Chen , Dong Xie , Qian-Ran Jia , Jun Zeng , Guo-Jie Chen , Yang Yang

{"title":"Numerical simulation study on the radon exhalation mechanism of building walls influenced by coupled heat-moisture-air transfer","authors":"Yuan-Chao Chen , Dong Xie , Qian-Ran Jia , Jun Zeng , Guo-Jie Chen , Yang Yang","doi":"10.1016/j.jenvrad.2025.107675","DOIUrl":"10.1016/j.jenvrad.2025.107675","url":null,"abstract":"<div><div>Building materials are one of the main sources of indoor radon, study of radon exhalation from building walls is of great reference significance for indoor radiation protection. Radon exhalation from building walls is comprehensively affected by environmental factors. A radon migration and exhalation model of building walls under the influence of coupled heat-moisture-air transfer was established. The radon exhalation mechanism of an aerated concrete wall under the influence of different relative humidity, temperature, relative humidity difference, temperature difference, air pressure difference and solar radiation was studied. The sensitivity of these factors to radon exhalation rate was analyzed. The results showed that the radon exhalation rate was positively correlated with relative humidity, but not with temperature; The radon exhalation rate was positively correlated with the relative humidity difference, and the temperature affected the correlation degree; The radon exhalation rate was positively correlated with the absolute temperature difference, and the relative humidity affected the correlation degree; The exhalation rate of radon was approximately linearly positive correlated with the pressure difference; Under the influence of solar radiation, the radon exhalation rate decreased; Radon parameters of material, relative humidity and solar radiation were more sensitive to radon exhalation rate than temperature, air pressure and radon concentration in air. For reducing radon exhalation rate of building walls and indoor radon concentration, we propose to use building wall materials with low radium content, keep indoor relative humidity and indoor and outdoor temperature difference low, and strengthen indoor ventilation at night, cloudy and rainy days.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"285 ","pages":"Article 107675"},"PeriodicalIF":1.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738797","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}

引用次数: 0

Experimental and computational analysis of the DNA damage induced in zebrafish, Danio rerio, early life stages after exposure to tritiated thymidine 氚化胸腺嘧啶对斑马鱼早期DNA损伤的实验与计算分析

IF 1.9 3区环境科学与生态学

Journal of environmental radioactivity Pub Date : 2025-03-28 DOI: 10.1016/j.jenvrad.2025.107682

Magali Schiano Di Lombo , Isabelle Cavalie , Virginie Camilleri , Jérôme Cachot , Yann Perrot , Beatrice Gagnaire

{"title":"Experimental and computational analysis of the DNA damage induced in zebrafish, Danio rerio, early life stages after exposure to tritiated thymidine","authors":"Magali Schiano Di Lombo , Isabelle Cavalie , Virginie Camilleri , Jérôme Cachot , Yann Perrot , Beatrice Gagnaire","doi":"10.1016/j.jenvrad.2025.107682","DOIUrl":"10.1016/j.jenvrad.2025.107682","url":null,"abstract":"<div><div>Tritium is an ubiquitous radioactive hydrogen isotope. It is found in all environmental compartments, in three different forms: tritiated water (HTO), gaseous tritium (HT) and organically bound tritium (OBT). Once internalized in the organism, it can either be found free in the tissues (TFWT) or bound to organic matter (OBT). This study aims to assess if tritiated thymidine, an organic form of tritium, induces DNA breaks once internalized in a model organism and its DNA. To do so, both experimental procedures and nanodosimetry simulations have been used. Zebrafish embryos (3.5 hpf, hours post fertilization) were exposed to three tritiated thymidine activity concentrations (7.5, 40, 110 kBq/mL, leading to internal dose rates of 22, 170 and 270 μGy/h) for four days. Individuals were sampled after 1 and 4 days of exposure and DNA break levels were assessed by the comet assay. Results showed that, even at the lowest activity concentration, tritiated thymidine induced DNA breaks in both embryos (1 dpf) and larvae (4 dpf). It was also highlighted that there was no increase nor decrease in DNA break level between 1 and 4 dpf, except in the case of the exposure to 170 μGy/h, where a slight decrease was observed. Geant4-DNA Monte Carlo simulations, performed on two spherical zebrafish nuclei of two different radii (2.5 and 5 μm), highlighted that organic tritium mainly induced single strand breaks (SSB). The results also showed that most of the damage was indirectly induced. Those results, combined with various experimentations, expose tritiated thymidine genotoxic pathways that could lead to both short- and long-term health effects.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"285 ","pages":"Article 107682"},"PeriodicalIF":1.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724362","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}

引用次数: 0