Isotopes in Environmental and Health Studies最新文献

{"title":"²²⁶Ra and ²²²Rn activity concentrations and associated effective doses for different age groups in spring water of Harnai, Balochistan.","authors":"Nisar Ahmad, Muhammad Bakhsh","doi":"10.1080/10256016.2025.2511138","DOIUrl":"https://doi.org/10.1080/10256016.2025.2511138","url":null,"abstract":"<p><p>In Harnai, Balochistan, Pakistan, the levels of ²²⁶Ra and ²²²Rn were measured with a high purity germenium (HPGe) detector and a RAD7 detector, respectively, in drinking water. The concentration of ²²²Rn in the spring water under investigation ranged from 2.8 ± 0.59-8.5 ± 0.80 Bq L^-1 with an average of 4.96 ± 0.7 Bq L^-1, while the concentration of ²²⁶Ra varied from 1.36 ± 0.55-6.8 ± 0.99 mBq L^-1 with an average of 3.54 ± 0.74 mBq L^-1. All concentrations of ²²²Rn and ²²⁶Ra were found to be below the global averages of 11.1 Bq L^-1 and 555 mBq L^-1, respectively. There was a positive connection (R² = 0.9398) between the concentrations of ²²²Rn and ²²⁶Ra. There are very weak associations between phyco-chemical characteristics and ²²²Rn and ²²⁶Ra. For various age groups, the estimated annual effective dosages from ingesting of ²²⁶Ra and ²²²Rn were determined to be below the advised threshold of 0.1 mSv y^-1. Based on the results, it has been concluded that the population in the research region is not significantly affected by ²²⁶Ra and ²²²Rn in spring water.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-11"},"PeriodicalIF":1.1,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144496675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First assessment of radiological impacts near the Rampal 1320 MW thermal power plant adjacent to the UNESCO world heritage site of Sundarbans, Bangladesh.","authors":"M M Mahfuz Siraz, S Nafis Haider, Araf Mahmud, Mohammad Shafiqul Alam, Md Bazlar Rashid, Mayeen Uddin Khandaker, Hamid Osman, Selina Yeasmin","doi":"10.1080/10256016.2025.2512859","DOIUrl":"10.1080/10256016.2025.2512859","url":null,"abstract":"<p><p>Environmental radioactivity is significantly elevated by coal combustion, posing risks to communities living near coal-fired thermal power plants (CFTPPs). This study presents the first comprehensive assessment of radiological impacts around the Rampal Thermal Power Plant, a 1320 MW facility located in Rampal Upazila, near the UNESCO World Heritage site of Sundarbans, Bangladesh. Thirty soil samples were systematically collected from distances of 100, 500, 1000, 2000, and 3000 m from the power plant. The activity concentrations of ²²⁶Ra, ²³²Th, and ⁴⁰K in soil ranged from 17-31, 29-51, and 350-670 Bq kg^-1, respectively, with a few samples exceeding the population-weighted global averages for ²²⁶Ra (32 Bq kg^-1) and ²³²Th (45 Bq kg^-1), and almost all the samples exceeding the average for ⁴⁰K (420 Bq kg^-1). The elevated levels of ²²⁶Ra, ²³²Th, and ⁴⁰K in the soil samples can be attributed to several interconnected factors, including the presence of thorium-rich minerals such as monazite and zircon, granitic geological formations, and anthropogenic inputs like bottom ash discharge from the plant and coal combustion byproducts. While the radium equivalent activity and hazard indices generally fell within safety limits, the higher outdoor and indoor absorbed dose rates, effective doses, and increased lifetime cancer risk raised alarms about potential health threats for nearby residents over time. Moreover, the long-term radiological effects on the Sundarbans ecosystem could disturb its fragile balance, impacting both biodiversity and the local communities that rely on its resources. These results highlight the necessity for further evaluations and remediation efforts to ensure the safe use of these soils in agricultural and construction activities. This research also seeks to develop a radiological distribution map, which will provide crucial baseline data for the forthcoming Rooppur Nuclear Power Plant.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-23"},"PeriodicalIF":1.1,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144368861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring stable isotope patterns in monthly precipitation across Southeast Asia using contemporary deep learning models and SHapley Additive exPlanations (SHAP) techniques.","authors":"Mojtaba Heydarizad, Nathsuda Pumijumnong, Masoud Minaei, Pouya Salari, Rogert Sorí, Hamid Ghalibaf Mohammadabadi","doi":"10.1080/10256016.2025.2508811","DOIUrl":"https://doi.org/10.1080/10256016.2025.2508811","url":null,"abstract":"<p><p>Stable isotopes are crucial for understanding water cycles and climate dynamics, particularly in tropical regions. However, establishing and maintaining precipitation sampling stations in Southeast Asia is challenging due to high costs and logistical issues. Consequently, many areas in this region have limited or no sampling stations with adequate stable isotope data. To address this problem, developing models that simulate stable isotope contents using machine learning (ML) techniques, especially deep learning, is a promising solution. In this study, the influence of large-scale climate modes (teleconnection indices) and local meteorological parameters on the stable isotope contents of precipitation was examined across six key stations in Southeast Asia, including Bangkok, Kuala Lumpur, Jakarta, Kota Bharu, Jayapura, and Singapore. A deep neural network (DNN) model was applied for simulation, and its performance was compared with a partial least squares regression (PLSR) model using various evaluation metrics. The DNN consistently demonstrated superior accuracy across all studied stations, highlighting the efficacy of DNNs, in accurately simulating stable isotope contents in tropical precipitation. The importance ranking derived from the SHapley Additive exPlanations (SHAP) technique aligns perfectly with the results obtained from the DNN importance function. In addition, the SHAP summary plot highlights the contributions of key features, such as precipitation and potential evaporation, to the model's predictions. The dependence plots further illustrate the relationship between these features and the predicted response, revealing nonlinear interactions that influence model behaviour. This research provides new insights into the complex interactions between large-scale climate drivers and local weather patterns, advancing the use of ML for isotope-based climate studies. The techniques used in this study offer a framework for applying ML to isotope analysis in tropical climates and can be extended to similar regions worldwide.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-22"},"PeriodicalIF":1.1,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144302078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Occupational exposure to NORM in gold mining areas of northwestern Sudan.","authors":"Minas E Ahmed, Modou Niang, Hamid Bounouira, Zobair El Afia, Mohamed Adam Abbo, Ndeye Arame Boye Faye","doi":"10.1080/10256016.2025.2482799","DOIUrl":"10.1080/10256016.2025.2482799","url":null,"abstract":"<p><p>This study was carried out to evaluate the distribution of naturally occurring radioactive materials (NORM) and radiological hazard indices in the soil of a gold mine in northwestern Sudan using gamma ray spectrometry. The activity concentrations of ²²⁶Ra, ²³²Th and ⁴⁰K in the soil samples varies from 2.54 ± 1.70 to 50.67 ± 3.10 Bq/kg, 10.28 ± 4.20 to 39.91 ± 2.10 Bq/kg and 274.64 ± 0.98 to 1625.85 ± 54.40 Bq/kg, respectively. The average activity concentration of ⁴⁰K were found to be above the world average. The annual effective dose is 0.05 mSv/year which is lower than the 20 mSv/year recommended by the International Commission on Radiological Protection (ICRP) guidelines for occupational exposure.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"264-272"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143700232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comprehensive assessment of radiological hazards in chromite mines at Khanozai and Muslim Bagh, Balochistan, Pakistan.","authors":"Nisar Ahmad, Niamat Ullah, Muhammad Bakhsh, Hannan Younis","doi":"10.1080/10256016.2025.2467381","DOIUrl":"10.1080/10256016.2025.2467381","url":null,"abstract":"<p><p>The concentrations of natural radioactivity in soil samples collected from chromite mines of two different towns, Khanozai and Muslim Bagh, districts of Pishin and Killa Saifullah, respectively, were measured using a high purity germanium (HPGe) detector. The average values of ²²⁶Ra, ²³²Th and ⁴⁰K in soil of Khanozai chromite mines were found to be 26.414, 37.321 and 404.561 Bq kg^-1, respectively. In Muslim Bagh chromite mines, these values were found to be 17.59, 29.677 and 380.475 Bq kg^-1, respectively. The maximum average values of radium equivalent (Ra_eq), external hazard index (H_ex) and internal hazard index (H_in) were found to be 110.851, 0.299 and 0.356 Bq kg^-1, respectively, in chromite mines of Khanozai, while the minimum average values were found to be 89.253, 0.276 and 0.275 Bq kg^-1, respectively, in Muslim Bagh chromite mines. Similarly, maximum average values of absorbed dose rate (D_R), external absorbed dose rate (D_out) and internal absorbed dose rate (D_in) were found to be 50.742, 54.651 and 77.058 nGy h^-1, respectively, in soil of Khanozai chromite mines while the minimum average values were found to be 41.311, 44.385 and 62.583 nGy h^-1, respectively, in Muslim Bagh chromite mines. Also, the maximum average values of annual effective dose risk (AEDR), gamma activity index (I_γ) and alpha activity index (I_α) were found to be 2.30 × 10^-1 mSv y^-1, 0.409 and 0.132, respectively, in soil of Khanozai chromite mines while the minimum average values were found to be 2.02 × 10^-1 mSv y^-1, 0.333 and 0.087, respectively, in Muslim Bagh chromite mines. The values were found to be below the world permissible range. Therefore, it is concluded that the chromite mines under the study have no health hazards.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"282-297"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143483097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reimagining the Kendall plot: using <i>δ</i>¹⁵N and <i>δ</i>¹⁸O of nitrate and advanced machine learning to improve N pollutant source classification.","authors":"Katarzyna Samborska-Goik, Leonard I Wassenaar","doi":"10.1080/10256016.2025.2467863","DOIUrl":"10.1080/10256016.2025.2467863","url":null,"abstract":"<p><p>Nitrate (<math><msubsup><mrow><mi>NO</mi></mrow><mn>3</mn><mo>-</mo></msubsup></math>) pollution is a serious water quality issue in many countries due to contamination of lakes, rivers, and aquifers by intensive agriculture practices and inadequate wastewater management. Nitrate pollution and associated cultural eutrophication are anticipated to increase worldwide, highlighting the need to control and reduce nitrogen pollution. The stable isotope ratios of nitrate (<i>δ</i>¹⁵N, <i>δ</i>¹⁸O) are widely used as tracers of nitrogen pollution sources. The primary technique for identifying nitrate sources has been the longstanding Kendall boxplot, despite improved methods using Bayes' theorem and the R language for estimating source fractions using hydrogeochemical context, N source data and expert assessment. This article improves the classification of aqueous nitrate sources using comprehensive published stable isotope data for nitrate from four known pollutant types and applying machine learning algorithms. AI modelling results reveal improved source depictions and offer a robust statistical framework for identifying N pollution sources. This is essential given the increased published data sources and the need for better-informed water quality management strategies.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"310-335"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143692021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrated MIKE SHE/MIKE+ modelling and isotopic investigations for freshwater assessment of the Suketi catchment in the Northwest Himalayas.","authors":"Abhishek Sharma, Ajay Kumar, Vijay Shankar, Praveen K Thakur","doi":"10.1080/10256016.2025.2482213","DOIUrl":"10.1080/10256016.2025.2482213","url":null,"abstract":"<p><p>Reducing the unrealistic simulations of different hydrological models is necessary for precise water assessment and flood forecasting. The scarcity of observed hydro-meteorological data in mountainous catchments further hinders the model's efficiency in water evaluations. This study aims to estimate the freshwater availability via characterizing the water balance employing a distributed MIKE System Hydrological European (SHE) model for the Suketi catchment of the Beas Basin, in Himachal Pradesh, India. For this purpose, the MIKE SHE/MIKE+ based model was developed for the study area using meteorological and basin-specific data. The collected samples from the rainfall, groundwater, and stream water during 2023-2024 were analysed for stable water isotopes, i.e. δ¹⁸O and δ²H. The quantitative evaluation established the efficacy of the MIKE SHE/MIKE+ based model with root-mean-square-error, coefficient of determination, Nash-Sutcliffe efficiency, and percentage bias of 76.67, 0.88, 0.92, and -0.32, respectively. The output of the developed model was integrated with the results of a two-component mixing model through the measured values of δ¹⁸O and δ²H. The local meteoric water line (LMWL: δ²H = 8.17 · δ¹⁸O + 13.11) reveals the different climatic conditions due to lower temperatures and higher latitude of the study area vis-a-vis global average. The validated water balance of the Suketi catchment infers adequate freshwater availability in the catchment with more than 74 % as baseflow to the Suketi river and evapotranspiration accounted for 64.42 % of water loss into the atmosphere.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"239-263"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143779999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiological risk assessment due to radon in bottled drinking water sold in Kahramanmaraş town, Turkiye.","authors":"Serdar Gümbür, Erdal Küçükönder","doi":"10.1080/10256016.2025.2476411","DOIUrl":"10.1080/10256016.2025.2476411","url":null,"abstract":"<p><p>This research aimed to measure radon activity concentrations in bottled drinking water (BDW) samples consumed in Kahramanmaraş town, Turkiye. Also, to evaluate the health risk that may occur as a result of internal irradiation resulting from ingestion and inhalation of radon in BDW samples, the total annual effective dose equivalent (AEDE) for infants, children, and adults (1-2 y, 2-12 y, and > 17 y) and excess lifetime cancer risk (ELCR) for adults (> 17 y) had to be calculated. For these purposes, 32 water samples of different volumes belonging to 8 different commercial brands, representing a large part of the BDW consumed as drinking water and sold commercially in Kahramanmaraş were collected by purchasing from markets. Radon activity amounts of BDW samples were determined using the Durridge Rad7 detector. The average value of radon activity concentrations in BDW samples was found to be 21.21 ± 1.50 mBq/L. Radon activity concentrations ranged from 13.50 ± 1.30 to 31.70 ± 2.20 mBq/L. Estimated mean total AEDE values for infants, children, and adults (1-2 y, 2-12 y, and > 17 y) were 7.43E-05, 4.39E-05, 5.43E-05 mSv y^-1, respectively. The average ELCR value calculated for adults was calculated as 2.40E-07.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"273-281"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143615613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A review of annual effective dose from ingesting ²²⁶Ra, ²³²Th, and ⁴⁰K in rice across different countries.","authors":"Dedawan Salam Saleh, Hemn Salh, Jahfer Majeed Smail, Saddon Taha Ahmad","doi":"10.1080/10256016.2025.2488297","DOIUrl":"10.1080/10256016.2025.2488297","url":null,"abstract":"<p><p>This review synthesises studies from various countries that have assessed the concentrations of ²²⁶Ra, ²³²Th, and ⁴⁰K in rice. Rice is a primary diet source for over 50 % of the global people, particularly in Asia. Thus, the estimation of the annual effective dose due to the ingestion of ²²⁶Ra, ²³²Th, and ⁴⁰K in rice has become an important area of study in food safety and human health risk assessment. The activity concentrations of ²²⁶Ra, ²³²Th, and ⁴⁰K in rice were found by gamma spectroscopy using sodium iodide scintillation (NaI (Tl)) and high purity germanium (HPGe) detectors. Even if the activity concentration of ⁴⁰K in Thailand rice is higher than 400 Bq kg^-1, the other present rice investigations demonstrate that the activity concentrations of ²²⁶Ra, ²³²Th, and ⁴⁰K are smaller than the world limit values of 35, 30, and 400 Bq kg^-1, respectively. Although the people of the Asia continent consume the highest rate of rice, the highest ingestion annual effective dose due to these radionuclides through consuming rice was found in Africa. It was found that the highest ingestion annual effective doses of ²²⁶Ra, ²³²Th, and ⁴⁰K from eating rice were 645.49 μSv y^-1 in Thailand, which is greater than the average value of 290 μSv y^-1 worldwide. For public health officials, researchers, and legislators who are worried about radioactive exposure from food sources, this review is an invaluable resource.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"298-309"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144008909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Daily and floor variations of indoor radon activity concentration in single-family houses.","authors":"Amira Kasumović, Besima Kadrić Bajrić, Amela Kasić, Zerina Sakić","doi":"10.1080/10256016.2025.2506450","DOIUrl":"https://doi.org/10.1080/10256016.2025.2506450","url":null,"abstract":"<p><p>In this paper, the results of indoor radon level measurements in thirteen single-family houses, on different floors, are presented. The measurement was performed using the AlphaE radon metre device, and in each house, the measurements lasted six days, on average. The mean values of the radon activity concentration were in the range of 32.32-525.65 and 18.41-185.25 Bq m^-3 for the ground floor and first floor rooms, respectively. The results of the statistical analyses on the variation of the radon level have shown that in nine houses (69 %), there is a significant difference in radon levels, with higher levels on the ground floor compared to the first floor. The variations of the radon levels during the night and daytime hours were also statistically analysed.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-11"},"PeriodicalIF":1.1,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144173833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}