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Radio-sensitivity of selected namibian landrace groundnut (Arachis hypogaea L.) genotypes to gamma radiation
IF 1.9 3区 环境科学与生态学
Journal of environmental radioactivity Pub Date : 2025-02-01 DOI: 10.1016/j.jenvrad.2025.107618
Remmie Hilukwa , Angelinus C. Franke , Maryke Labuschagne , Maliata Athon Wanga , Rose-mary Kavemuine Hukununa , Magdalena Ndafapawa Hangula , Eddie.B.S. Hasheela , Cinthya Zorrilla , Fatma Sarsu
{"title":"Radio-sensitivity of selected namibian landrace groundnut (Arachis hypogaea L.) genotypes to gamma radiation","authors":"Remmie Hilukwa ,&nbsp;Angelinus C. Franke ,&nbsp;Maryke Labuschagne ,&nbsp;Maliata Athon Wanga ,&nbsp;Rose-mary Kavemuine Hukununa ,&nbsp;Magdalena Ndafapawa Hangula ,&nbsp;Eddie.B.S. Hasheela ,&nbsp;Cinthya Zorrilla ,&nbsp;Fatma Sarsu","doi":"10.1016/j.jenvrad.2025.107618","DOIUrl":"10.1016/j.jenvrad.2025.107618","url":null,"abstract":"<div><div>Groundnut (<em>Arachis hypogaea</em> L.) is a popular nutritious food crop in the world. In Namibia, groundnut varieties are limited and characterized by low yields of 0.4 t/ha. Its production is challenged by biotic and abiotic stresses and low genetic variability in the agroecological zones of Namibia. Gamma-irradiation mutagenesis is a technique applied to generate genetic variation based on the genotype's sensitivity to the mutagenic agent for the selection of traits of economic importance that fulfill the user's requirements. This study aimed to determine the optimal lethal doses (LD<sub>50</sub>) of mutagens producing maximum mutations with minimum damage for mass gamma-irradiation on Namibian landraces of groundnut in preparation for mutation breeding programs. Seeds of three groundnut varieties (‘NAM 4433’, ‘NAM 888/2', ‘NAM 1747/1’) were subjected to six gamma radiation doses [0, 50, 75, 100, 125, and 150 Gy (Gy)]. The radiation source was Cobalt-60, with an irradiation rate of 28.81 Gy/min. Irradiated and non-irradiated (control) seeds were sown in plastic pots, using a factorial experiment with a randomized complete block design. Data were collected on parameters relating to seed germination, seedling growth, and plant survival of the varieties. A linear regression model was developed to determine the mean lethal dose (LD<sub>50</sub>) and reduction dose (RD<sub>50</sub>) of the varieties. Combined analysis of variance showed significant responses (p &lt; 0.001) to seedling emergence, shoot, and root traits. Genotype NAM 4433 was most sensitive to gamma radiation doses ranging from 106 to 150 Gy. The doses could be used in mutation breeding programs to select mutants with desirable agronomic and nutritional traits for farmers and consumers. Genotypes NAM 1747/1 and NAM 888/2 did not respond to the doses applied.</div><div>Further research using high radiation doses for NAM 1747/1 and NAM 888/2 is recommended.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107618"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143023597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
引用次数: 0
Investigation of tritium content in wild plants growing in an area with an underground source of tritium 地下氚源区野生植物氚含量调查。
IF 1.9 3区 环境科学与生态学
Journal of environmental radioactivity Pub Date : 2025-02-01 DOI: 10.1016/j.jenvrad.2024.107602
Andrei Vyacheslavovich Mikhailov, Sergey Nikolaevich Lukashenko, Andrei Vladislavovich Thomson, Mariya Alexandrovna Edomskaya
{"title":"Investigation of tritium content in wild plants growing in an area with an underground source of tritium","authors":"Andrei Vyacheslavovich Mikhailov,&nbsp;Sergey Nikolaevich Lukashenko,&nbsp;Andrei Vladislavovich Thomson,&nbsp;Mariya Alexandrovna Edomskaya","doi":"10.1016/j.jenvrad.2024.107602","DOIUrl":"10.1016/j.jenvrad.2024.107602","url":null,"abstract":"<div><div>Within the framework of the presented work, the results of large-scale studies of the content of TFWT in wild plants growing in an area with an underground source of tritium are presented. Various types of plants were studied: herbaceous, shrubby, woody. The concentration of TFWT in various vegetative organs of the same plants was analyzed separately. Sampling was carried out throughout the growing season from germination to wilting of plants. Additionally, plants with aerial intake of tritium were studied.</div><div>The concentration of TFWT in the leaves of plants at the root pathway of tritium intake into plants is on average 0.71 of the concentration of TFWT in the stems of the same plants. This value varies from 0.30 ± 0.06 to 1.1 ± 0.3 for plants of different species, but never exceeds 1 significantly. The concentration of TFWT in the leaves of plants with an aerial intake of tritium is on average 1.5 times higher than the concentration of TFWT in the stems of the same plants. This value varies from 0.86 ± 0.59 to 2.9 ± 1.9, but never significantly below 1.</div><div>The concentration of TFWT in the same vegetative organs of herbaceous plants of different species growing on the same site differs significantly - up to 2.6 times. The concentration of TFWT in the vegetative organs of herbaceous and woody plants also differs significantly – up to 2.3 times.</div><div>The concentration of TFWT in the same vegetative organs of plants of different species can vary up to 3.5 times. At the same time, the concentration of TFWT in shrubby and woody plants does not differ so significantly – the average difference is 1.2 times, with the largest detected difference being 1.4 times. There is practically no significant difference between the content of TFWT in different types of woody and shrubby plants.</div><div>The dependence of the concentration of TFWT in the vegetative organs of plants of the same species at different vegetative stages was found. The concentration of TFWT in the same vegetative organ of a plant of the same species varies up to 14 times and, as a rule, decreases significantly by the end of the growing season.</div><div>Thus, it is proved that the distribution of tritium over the vegetative organs of wild plants is uneven. It depends on the mechanism of tritium intake into the plant, the type of plant, its vegetation phase. An innovative method is proposed for determining the mechanism of tritium intake into a plant by the coefficient M – the ratio of TFWT in leaves to TFWT in plant stems. At a value of the coefficient M below 1, the intake of tritium into vegetation is predominantly root, at a value above 1– it is aerial.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107602"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142872202","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
Forward calculation of airborne gamma 3D radiation fields based on rapid coupling method of point kernel integrals 基于点核积分快速耦合法的机载伽马三维辐射场正演计算。
IF 1.9 3区 环境科学与生态学
Journal of environmental radioactivity Pub Date : 2025-02-01 DOI: 10.1016/j.jenvrad.2024.107603
Peng Cheng , Shuang Qi , Xian Guan , Xing Wei , Fei Li , Guoqiang Zeng
{"title":"Forward calculation of airborne gamma 3D radiation fields based on rapid coupling method of point kernel integrals","authors":"Peng Cheng ,&nbsp;Shuang Qi ,&nbsp;Xian Guan ,&nbsp;Xing Wei ,&nbsp;Fei Li ,&nbsp;Guoqiang Zeng","doi":"10.1016/j.jenvrad.2024.107603","DOIUrl":"10.1016/j.jenvrad.2024.107603","url":null,"abstract":"<div><div>Airborne gamma ray spectrum detection technology is an effective means to measure the concentration and spatial distribution of natural radionuclides in environmental media such as surface rocks and soil during aviation flight. Therefore, it is vital to fully explore the radiation information related to mineralization in airborne gamma spectrometry data and explore the dose distribution law of gamma radiation field of radionuclides in the detection area. This paper is based on the theoretical calculation model of ground-air interface gamma radiation field. After discretizing the equivalent surface source of the geological body with irregular and uniformly distributed radionuclides into a grid, it is divided into differential surface sources of uniform size, density, and isotropy. A theoretical calculation model for the spatial radiation field of differential surface sources at the ground-air interface has been derived. Finally, a rapid calculation program for the 3D radiation field of irregular surface sources coupled with point sources has been developed using the Qt framework. The accuracy and efficiency of the program were tested through three examples. For a single regular surface source, the rectangular surface source exhibited higher consistency at most detection points. The average relative deviation was 9.183%. In the case of a circular surface source, the dose rate values between the two methods deviated more significantly in the edge regions but less so in the central region. The average relative deviation was 12.765%. When comparing the calculation data of two irregular surface source models, the rapid calculation program was dozens of times faster than the SuperMC program. The maximum relative deviation was 38.245%, the minimum relative deviation was 5.416%, and the calculation accuracy was high. The average relative deviation was 21.912%. On several irregular surface source models, the relative deviations were relatively large. The maximum relative deviation reached 52.234%, the minimum was 12.305%, and the average relative deviation was 28.126%. This study can provide a certain theoretical reference for researchers in related fields, promoting the development and application of airborne gamma radiation field technology.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107603"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142872186","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
Radionuclide sorption dynamics in the Rhone River: Experimental and modelling approach 罗纳河的放射性核素吸收动力学:实验和模拟方法。
IF 1.9 3区 环境科学与生态学
Journal of environmental radioactivity Pub Date : 2025-02-01 DOI: 10.1016/j.jenvrad.2024.107609
Léonore Flipo , Frédéric Coppin , L. Garcia-Sanchez , Philippe Ciffroy , Olivier Radakovitch
{"title":"Radionuclide sorption dynamics in the Rhone River: Experimental and modelling approach","authors":"Léonore Flipo ,&nbsp;Frédéric Coppin ,&nbsp;L. Garcia-Sanchez ,&nbsp;Philippe Ciffroy ,&nbsp;Olivier Radakovitch","doi":"10.1016/j.jenvrad.2024.107609","DOIUrl":"10.1016/j.jenvrad.2024.107609","url":null,"abstract":"<div><div>The transfer of radionuclides discharged into rivers by nuclear facilities are conditioned by their solid/liquid fractionation, commonly represented by an equilibrium approach using the distribution coefficient <span><math><mrow><msub><mi>K</mi><mi>d</mi></msub></mrow></math></span>. This coefficient, largely used in modeling, assumes an instantaneous and completely reversible reaction. However, such assumptions are rarely verified. Compared to instantaneous adsorption of radionuclides onto particles, slower reactions may lead to an underestimation of the dissolved fraction, and modifications of environmental conditions (<em>e.g.</em> at confluences, dams …) may induce a change in solid/liquid partition. Considering this background, this study aims to assess whether models incorporating one or more kinetics to describe this fractionation allow more accurate estimations than the equilibrium approach. A large dataset has been obtained experimentally to compare and test fractionation models. The exchanges of four radionuclides (<sup>137</sup>Cs, <sup>60</sup>Co, <sup>54</sup>Mn, and <sup>110m</sup>Ag) between solution and riverine suspended particulate matter (from the Rhone River, France) were followed in laboratory. Adsorption kinetics were monitored starting from 30 min up to 2 months. They stabilized only after several days and up to 2 weeks. Dilutions of the contaminated suspension were carried out after 1 h, 3 days, 10, 21 and 31 days of prior adsorption, to simulate a change in environmental conditions, such as the input of uncontaminated water from a tributary. The dilution induced a quick release from solid to liquid at first, followed by a non-expected re-adsorption for all four radionuclides. 31-days sorption data were used to fit the parameters of a Kd model and derived models involving one (EK) or two fractionation kinetics (KK). Predictions were then carried out to evaluate the model capacities to react to a dilution of the contamination. Unlike the Kd model, which is a constant, the kinetic models predicted a variation in the solid/liquid activity ratio over time and when environmental conditions changed. However, models developed on one-step sorption showed limitations to reproduce the adsorption kinetics observed after a dilution, especially when a previous steady-state was reached.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107609"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142965206","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
Revisiting the historical tritium levels in precipitation in Greece – Preliminary assessment of groundwater transit times 重新考察希腊降水中的历史氚水平-地下水过境时间的初步评估。
IF 1.9 3区 环境科学与生态学
Journal of environmental radioactivity Pub Date : 2025-02-01 DOI: 10.1016/j.jenvrad.2025.107619
Ioannis Matiatos , Paraskevas Tsangaratos , Lorenzo Copia , Luis Araguás-Araguás
{"title":"Revisiting the historical tritium levels in precipitation in Greece – Preliminary assessment of groundwater transit times","authors":"Ioannis Matiatos ,&nbsp;Paraskevas Tsangaratos ,&nbsp;Lorenzo Copia ,&nbsp;Luis Araguás-Araguás","doi":"10.1016/j.jenvrad.2025.107619","DOIUrl":"10.1016/j.jenvrad.2025.107619","url":null,"abstract":"<div><div>The radioactive isotope of hydrogen, known as tritium (<sup>3</sup>H), is very often used as a dating tool in hydrogeological studies, since it enters the water cycle as part of the water molecule through precipitation. However, the assessment of groundwater transit times and recharge often requires knowing the local historical records of tritium levels in precipitation during the previous seven decades, or the tritium in precipitation (TIP) time series. Here, we compiled all tritium records in precipitation in Greece, with the majority of stations showing sporadic measurements, with the aim of reconstructing a TIP for groundwater dating purposes. The monitoring station of Vienna proved to be more reliable for filling the gaps in the time series than the Ottawa station. Conventional methods to fill the TIP gaps, such as the correlation method (CM), were compared with more advanced machine learning tools, such as the Convolutional Neural Networks (CNN). The comparison showed that the artificial Intelligence Method (AIM) performed best, due to its ability to capture complex nonlinear trends that are usually inherent in real-world data. The preliminary qualitative assessment of groundwater tritium data from Greece, in comparison to the TIP, showed the occurrence of groundwaters of mean transit times ranging from a few years to decades. Better incorporation of groundwater transit times and recharge rates into the study of aquifer systems is essential for developing strategies for sustainable water management in Greece and worldwide.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107619"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143006496","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 transfer of 137Cs in sensitive agricultural environments after the Chornobyl fallout in Sweden
IF 1.9 3区 环境科学与生态学
Journal of environmental radioactivity Pub Date : 2025-02-01 DOI: 10.1016/j.jenvrad.2025.107621
Mykhailo Vinichuk , Magnus Simonsson , Maja Larsson , Klas Rosén
{"title":"Long-term transfer of 137Cs in sensitive agricultural environments after the Chornobyl fallout in Sweden","authors":"Mykhailo Vinichuk ,&nbsp;Magnus Simonsson ,&nbsp;Maja Larsson ,&nbsp;Klas Rosén","doi":"10.1016/j.jenvrad.2025.107621","DOIUrl":"10.1016/j.jenvrad.2025.107621","url":null,"abstract":"<div><div>In this study, the long-term transfer of <sup>137</sup>Cs from soil to grass on Swedish farms and fields, heavily contaminated after the 1986 radioactive fallout, was investigated. The study spans over 8–14 years, beginning in June 1986, and covers various soil types and agricultural practices. The transfer of <sup>137</sup>Cs from soil to grass was highly variable, with transfer factors ranging from 1.0 × 10<sup>−5</sup> to 0.357 m<sup>2</sup> kg<sup>−1</sup>. Higher values were observed on fields with sandy loam, loamy sand, and organic soils, and lower values on fields with a high clay content. The transfer of <sup>137</sup>Cs to grass generally exhibited an exponential decline across the majority of fields over the years. The rate of decrease was most pronounced in clay loam and silty loam soils, while it was least evident in sandy loam, sandy soils, and peat soils. The soil properties and farming practices were more important for <sup>137</sup>Cs uptake than the initial deposition density. The transfer factor had a negative correlation with soil pH, clay, and fine silt content. No significant relationships were found with other soil variables, such as soil organic matter content and plant available potassium concentration. The median effective half-life of <sup>137</sup>Cs in the grass was 4.5 years, with a range of 2–18 years. The uptake of <sup>137</sup>Cs by plants did not correlate with the potassium concentration in grass tissues; however, the activity concentration of <sup>137</sup>Cs in grass correlated negatively with the potassium content in the plants grown on fields with high deposition levels.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107621"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143039338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
引用次数: 0
Nuclear accident-derived 129I in several river water, eastern Fukushima, Japan, 2016–2020 2016-2020年,日本福岛东部几条河流中核事故衍生的129I。
IF 1.9 3区 环境科学与生态学
Journal of environmental radioactivity Pub Date : 2025-02-01 DOI: 10.1016/j.jenvrad.2025.107617
Shinji Ueda , Hidenao Hasegawa , Yoshihito Ohtsuka , Shinya Ochiai
{"title":"Nuclear accident-derived 129I in several river water, eastern Fukushima, Japan, 2016–2020","authors":"Shinji Ueda ,&nbsp;Hidenao Hasegawa ,&nbsp;Yoshihito Ohtsuka ,&nbsp;Shinya Ochiai","doi":"10.1016/j.jenvrad.2025.107617","DOIUrl":"10.1016/j.jenvrad.2025.107617","url":null,"abstract":"<div><div>Radionuclides, including <sup>129</sup>I, were released into the atmosphere by the Fukushima nuclear power plant accident. We measured the dissolved <sup>129</sup>I concentration in 11 rivers in eastern Fukushima from 2016 to 2020 to clarify the <sup>129</sup>I concentration level in river water under base-flow conditions. During the study period, the maximum <sup>129</sup>I concentration in the river water was 1.6 × 10<sup>−6</sup> Bq L<sup>−1</sup> in the Ukedo River in 2016, and the minimum was 1.2 × 10<sup>−7</sup> Bq L<sup>−1</sup> in the Uda River in 2017, with a difference of over an order of magnitude between the two. Water samples from the Ukedo, Niida-U, and Nagadoro Rivers in eastern Fukushima were strongly affected <sup>129</sup>I from the Fukushima accident. In addition, we found a significant correlation between concentration of <sup>129</sup>I in river water and mean <sup>129</sup>I contamination density in the catchment. The time-series variation of <sup>129</sup>I in river water from 2016 to 2020 was small and showed no year-to-year decrease. The <sup>129</sup>I concentration in each river hardly decreased compared to the <sup>137</sup>Cs decay-corrected concentration during the observation period, and it was expected that a certain concentration of dissolved <sup>129</sup>I would continue to flow out over a long period of time.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107617"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142978843","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
Validation of a spatial model of background radiation using personal measurements in children 使用儿童个人测量验证背景辐射空间模型。
IF 1.9 3区 环境科学与生态学
Journal of environmental radioactivity Pub Date : 2025-01-01 DOI: 10.1016/j.jenvrad.2024.107581
Christophe L. Folly , Antonella Mazzei-Abba , Astrid Coste , Christian Kreis , Ben D. Spycher
{"title":"Validation of a spatial model of background radiation using personal measurements in children","authors":"Christophe L. Folly ,&nbsp;Antonella Mazzei-Abba ,&nbsp;Astrid Coste ,&nbsp;Christian Kreis ,&nbsp;Ben D. Spycher","doi":"10.1016/j.jenvrad.2024.107581","DOIUrl":"10.1016/j.jenvrad.2024.107581","url":null,"abstract":"<div><h3>Background</h3><div>Limited knowledge about the prediction accuracy of exposure models hinders the interpretation of results from epidemiological studies on childhood cancer risks associated with exposure to background gamma-radiation.</div></div><div><h3>Objective</h3><div>We aimed to validate a spatial exposure model that we recently developed for Switzerland.</div></div><div><h3>Methods</h3><div>We used individual exposure measurements conducted with D-Shuttle dosimeters by 149 children throughout the country. We ran linear regression models fitting the measured exposure against predictions from the newly developed model, and compared results with the predictions from an earlier model. We further used variograms to investigate the spatial correlation of estimation errors.</div></div><div><h3>Results</h3><div>The prediction accuracy of the newly developed exposure model was modest (R<sup>2</sup> = 0.2), but better than the earlier model (R<sup>2</sup> = 0.13). Prediction errors revealed weak spatial correlation.</div></div><div><h3>Discussion</h3><div>Although the new exposure model marks an improvement, the modest prediction accuracy and the remaining spatial correlation of errors show room for further improvement. Our study highlights the need for validation of exposure models for background gamma-radiation used in epidemiological studies.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"281 ","pages":"Article 107581"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142769349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
引用次数: 0
Radon exhalation rate prediction and early warning model based on VMD-GRU and similar day analysis 基于VMD-GRU和相似日分析的氡呼出率预测预警模型。
IF 1.9 3区 环境科学与生态学
Journal of environmental radioactivity Pub Date : 2025-01-01 DOI: 10.1016/j.jenvrad.2024.107593
Shijie Fang , Yifan Chen , Xianwei Wu , Nuo Zhao , Yong Liu (Prof)
{"title":"Radon exhalation rate prediction and early warning model based on VMD-GRU and similar day analysis","authors":"Shijie Fang ,&nbsp;Yifan Chen ,&nbsp;Xianwei Wu ,&nbsp;Nuo Zhao ,&nbsp;Yong Liu (Prof)","doi":"10.1016/j.jenvrad.2024.107593","DOIUrl":"10.1016/j.jenvrad.2024.107593","url":null,"abstract":"<div><div>To improve the safety and reliability of radon exhalation rate monitoring systems, this study introduces an early warning method that integrates a VMD-GRU prediction model with a similar day analysis. Initially, radon exhalation rate data are decomposed into components with different informational content using the Variational Mode Decomposition (VMD) algorithm. Each component is forecasted by using the Gated Recurrent Unit (GRU) algorithm, and these forecasts are aggregated to estimate the overall radon exhalation rate. The effectiveness of the VMD-GRU model is validated through comparisons with ELMAN, LSTM, GRU,VMD-ELMAN and VMD-LSTM models. Finally, by combining the VMD-GRU model's outcomes with the similar day analysis, the system performs real-time monitoring and anomaly detection of radon exhalation rates. The results demonstrate that the proposed model effectively identifies and early warnings to abnormal radon fluctuations, significantly enhancing the precision of anomaly early warnings and providing robust decision support for radon monitoring and control, thus paving new paths for similar early warning systems.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"281 ","pages":"Article 107593"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142769348","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
Corrigendum to “Geant4 Monte Carlo simulation of human exposure to indoor 222Rn from building materials” [J. Environ. Radioact. 280 (2024) 107562] 对 "Geant4 蒙地卡罗模拟人类接触室内建筑材料产生的 222Rn 的情况 "的更正[J. Environ. Radioact. 280 (2024) 107562]。
IF 1.9 3区 环境科学与生态学
Journal of environmental radioactivity Pub Date : 2024-12-01 DOI: 10.1016/j.jenvrad.2024.107569
Felix Haman , Cebastien Joel Guembou Shouop , Dorine Flore Tiomene , Daniel Bongue , Patricia-Laurelle Degbe , Eric Jilbert Nguelem Mekongtso , Maurice Ndontchueng Moyo , Moïse Godfroy Kwato Njock
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