Isotopes in Environmental and Health Studies最新文献

{"title":"Radiological assessment and potential health risks of naturally occurring radioactive materials in Kuakata Sea Beach sand: implications for rare-earth resources and nuclear fuel cycle feasibility.","authors":"M M Mahfuz Siraz, Musfik R Fahim, Mohammad Shafiqul Alam, Araf Mahmud, Md Bazlar Rashid, Mayeen Uddin Khandaker, Hamid Osman, Selina Yeasmin","doi":"10.1080/10256016.2025.2555952","DOIUrl":"https://doi.org/10.1080/10256016.2025.2555952","url":null,"abstract":"<p><p>To assess the natural radioactivity levels and associated health risks in beach sand from Kuakata Sea Beach, this study performed a comprehensive radiological analysis of systematically collected sand samples using high-purity germanium (HPGe) γ-ray spectroscopy. The average (range) radioactivity levels of ²²⁶Ra, ²³²Th, and ⁴⁰K in the examined sand samples were 57 (37-105), 121 (76-231), and 210 (181-270) Bq kg^-1, respectively, thus markedly higher than the world average values of 30, 35, and 400 Bq kg^-1 for ²²⁶Ra, ²³²Th, and ⁴⁰K, respectively. The evaluation of different radiological risk parameters indicates values (maximum radium equivalent activity of 449.27 Bq kg^-1, maximum outdoor absorbed dose rate of 205.58 nGy h^-1, and maximum external hazard index of 1.21) much higher than the recommended levels, signifying that heavy minerals rich sands could pose a substantial health risk to individuals. The current findings have the potential to generate interest and exploration in rare-earth resources, particularly for their applications in the electronics industry, and thorium based nuclear fuel cycle resources for the next generation nuclear energy industry.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-24"},"PeriodicalIF":1.4,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145185882","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":"Radiation exposure due to radon, thoron and their progeny in different types of dwellings in two districts of Meghalaya, India.","authors":"A Pyngrope, A Saxena, B K Sahoo","doi":"10.1080/10256016.2025.2559198","DOIUrl":"https://doi.org/10.1080/10256016.2025.2559198","url":null,"abstract":"<p><p>A survey on indoor radon, thoron and their progeny activity concentration has been carried out in two districts of Meghalaya, India, using the recently developed pin-hole dosimeter and DRPS/DTPS progeny sensors. Significant variation in these radionuclides has been observed amongst different house types and seasons of the year; responsible factors are discussed in detail. The mean observed concentration level of radon, thoron and their progeny are 63.7 ± 6, 65.1 ± 8, 24.8 ± 2 and 1.3 ± 0.1 Bq m^-3, respectively. These values are higher than the global average but lie within the prescribed limit. The estimated total annual effective dose is 2.07 mSv, which is within the permissible limit (3-10 mSv) as recommended by the International Commission on Radiological Protection (ICRP). Calculated values of radon and thoron equilibrium factors are, at par, with global findings. Positive but weak correlations between radon, thoron and their progeny concentrations have been observed.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-13"},"PeriodicalIF":1.4,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145191767","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":"Radioactivity measurements of chemical and organic fertilizers applied to farms in the Kurdistan Region, Iraq.","authors":"Hallo M Abdullah, Ali H Ahmed, Ahmed I Samad, Mohammed I Hussein","doi":"10.1080/10256016.2025.2556934","DOIUrl":"https://doi.org/10.1080/10256016.2025.2556934","url":null,"abstract":"<p><p>The use of chemical and organic fertilizers in the farms of the Kurdistan region has increased because of land reclamation and agricultural activities. The ores used in some chemical fertilizers contain various amounts of radioisotopes such as ²³⁸U, ²³²Th, ⁴⁰K and ¹³⁷Cs. For this reason, chemical fertilizers are considered one of many sources of radionuclides and radioactivity in the environment. In this work, the specific activities of ²³⁸U, ²³²Th, ⁴⁰K and ¹³⁷Cs in samples of twenty common chemical fertilizers and of five organic fertilizers were estimated by using a gamma ray spectrometer based on the NaI(Tl) detector<i>.</i> The total average activity concentrations of ²³⁸U, ²³²Th, ⁴⁰K and ¹³⁷Cs were 8.81, 8.31, 2360.36 and 0.07 Bq kg^-1, respectively. In general, chemical fertilizers revealed higher radioactivity than organic fertilizers, and the agricultural application of these fertilizers may cause health risks unless their usage has been controlled scientifically.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-12"},"PeriodicalIF":1.4,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145175397","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":"Assessment of health risks due to natural radioactivity of some building materials in Algeria.","authors":"Abdelfettah Belafrites","doi":"10.1080/10256016.2025.2557497","DOIUrl":"https://doi.org/10.1080/10256016.2025.2557497","url":null,"abstract":"<p><p>This study aims to evaluate the radiation doses from building materials, including sand, cement, brick, faience, plaster and marble, collected from different sites in eastern Algeria. The specific activities of natural radionuclides, mainly represented by the natural radioactive series ²³⁸U, ²³²Th and primordial ⁴⁰K, were determined using a gamma spectrometry system equipped with a high purity germanium (HPGe) detector. Radiological hazard parameters (Ra_eq, H_ex, H_in, I_γ and I_α) associated with these activities were calculated to determine the suitability of the construction materials. To assess their radiological risks to human health, an analysis of absorbed dose rate (D), annual effective dose (AED) and excess lifetime cancer risk (ELCR) was performed and the results examined and compared with those reported elsewhere. The findings obtained for these samples are within the limits of internationally recommended values.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-13"},"PeriodicalIF":1.4,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145149000","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":"Health hazards associated with radon present in soil of Nizampur, Khyber Pakhtunkhwa, Pakistan.","authors":"Jehangir Ijaz, Yuping Su, Nisar Ahmad, Muhammad Bakhsh","doi":"10.1080/10256016.2025.2558223","DOIUrl":"https://doi.org/10.1080/10256016.2025.2558223","url":null,"abstract":"<p><p>Over 50% of the annual dosage is caused by inhaling radon, thoron, and their decay products. Additionally, indoor concentrations of radon and thoron's decay agents are primarily responsible for the inhalation doses linked to these gases. This study aimed to measure the activity of radon in soil of Nizampur, and associated cancer risk using an RAD7 detector. The range and average values of radon in soil were found to be 994-14,700 Bq m^-3 and 6184 Bq m^-3, respectively. Radon exhalation rate ranged from 220 to 3442 Bq m^-2 h^-1 with an average value of 1447 Bq m^-2 h^-1. The statistical analysis of radon in the soil shows that due to possible localized sources or measurement inconsistency, ambient radon data often exhibits mild skewness or kurtosis, which is shown by minor deviations at the extremes (tails). Based on the values of radon exhalation rate which were found higher than the world permissible value of 57.60 Bq m^-2 h^-1, it is concluded that the soil of the study area may pose health hazards if it is used for construction or other purposes.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-10"},"PeriodicalIF":1.4,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145137716","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":"Off-line measurement of carbon stable isotopes of trisaccharides, disaccharides, glucose and fructose in honey samples.","authors":"Matheus C Carvalho","doi":"10.1080/10256016.2025.2559196","DOIUrl":"https://doi.org/10.1080/10256016.2025.2559196","url":null,"abstract":"<p><p>Online liquid chromatography (LC) followed by isotope ratio mass spectrometry (IRMS) is a trusted technique to detect honey adulteration based on the stable carbon isotope composition (δ¹³C) of trisaccharides, disaccharides, glucose and fructose. However, LC-IRMS demands specialised analytical setups not commonly found in most isotope labs. Here we investigate the use of off-line LC followed by elemental analysis (EA)-IRMS as an alternative employing more commonly available instruments. Precision and accuracy were excellent for fructose and glucose (error < 0.1 mUr), but less so for disaccharides and trisaccharides, which are similar results to online LC-IRMS. Therefore, offline LC-EA-IRMS can be a viable alternative for the analysis of honey purity employing stable carbon isotopes.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-5"},"PeriodicalIF":1.4,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145130816","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":"Geospatial distribution of natural radionuclides and radiological assessments in Asia's largest coastal lagoon sediment, Chilika, India.","authors":"Satyanarayan Bramha, Sunil Kumar Sahoo, S Chandrasekaran, Prasanta Rath","doi":"10.1080/10256016.2025.2552842","DOIUrl":"https://doi.org/10.1080/10256016.2025.2552842","url":null,"abstract":"<p><p>The pioneer work on the measurement and distribution of natural radioactivity levels was carried out in the sediment samples of Asia's largest coastal lagoon, Chilika, India. The activity concentrations of radionuclides in the sediment samples measured by using a high-resolution HPGe semiconductor detector gamma-ray spectroscopy system, and the average activity concentration of ²²⁶Ra, ²³²Th, and ⁴⁰K were found to be 28.25 ± 7.85, 84.27 ± 30.93 and 610.57 ± 89.74 Bq kg^-1. The contour map, drawn using the Kriging method, illustrates the geospatial distribution of each radionuclide in Chilika. The results show the distribution of radionuclides and are compared with similar results from different locations in the worldwide. The activity concentrations are also compared with the average values of the world and India. The radiological indices for the lagoonal system were calculated, and the mean values are 195.77 Bq kg^-1 for radium equivalent (Ra_eq), 167.53 nGy h^-1 for absorbed gamma dose rate (D_R), 0.21 mSv y^-1 for annual effective dose equivalent (AEDE), 631.27 µSv y^-1 for Annual gonadal dose equivalent (AGDE), 0.53 for external hazard index (H_ex), 0.61 for internal hazard index (H_in), 0.72 for gamma representative level index (Iγr), and 0.14 for alpha index (Iα). The mean value of the Ra_eq obtained from the study area was less than the international value of 370 Bq kg^-1. All the radiological assessment indices indicated that the observed values are below the threshold values.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-16"},"PeriodicalIF":1.4,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145069583","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":"Mapping spatiotemporal variability of wet season surface water processes in the Cuvelai-Etosha Basin, Namibia using stable isotopes.","authors":"Heike Wanke, Tamekeni P Nantuua, Nyambe Masiye, Martin Hipondoka, Josefina T Hamutoko, Kwok Pan Chun","doi":"10.1080/10256016.2025.2538594","DOIUrl":"https://doi.org/10.1080/10256016.2025.2538594","url":null,"abstract":"<p><p>The natural tracers δ¹⁸O and δ²H are essential for tracing hydrological processes by identifying water sources, tracking evaporation loss and floodwater dynamics to enhance water management and flood mitigation strategies. This study employed this approach in the ephemeral, endorheic Cuvelai-Etosha Basin (CEB), spanning northern Namibia and southern Angola, to determine its viability in capturing spatial and temporal hydrological patterns, their timing and interactions during a medium flood condition (2017), and contrasted with a drought year (2014). During the 2017 wet season 219 grab surface water samples were collected from ephemeral waterbodies in four sampling campaigns (February, March, April and May) in addition to a single campaign in May 2014 (63 samples). Samples were analysed for stable isotopes (δ²H and δ¹⁸O) at the University of Namibia laboratory using an off-axis integrated cavity output spectroscope (Los Gatos, DLT-100). Results for 2017 revealed a compositional range of -13.51 to 12.44 ‰ for δ¹⁸O and from -100.1 to 50.9 ‰ for δ²H. The 2017 samples plot along a low sloping line (δ²H = 5.19 δ¹⁸O - 13.91) indicating the dominance of the evaporation effect. Amount, seasonality, and latitude effects were also identified in the isotopic composition of the <i>iishana</i> water. The surface water loss to evaporation is in the range of 24-42 % from March to April and 39-69 % from March to May. The <i>d-</i>excess decreased from April and remains relatively low in May, which supports observations of evaporation losses. The overall large water losses from the system via evaporation reduces the water availability substantially, and the impact is more pronounced in the western part of the basin than in the eastern. Since evaporative loss begins early, even during the rainy season, proactive technical solutions such as floodwater harvesting need to be planned accordingly to mitigate losses and optimizing water use.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-24"},"PeriodicalIF":1.4,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145023408","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":"Alpha emitter concentrations of natural radionuclides and radiological hazard assessment of soil samples in the Halabja governorate, Iraq.","authors":"Hiwa Mohammad Qadr, Najeba Farhad Salih, Ari Maghdid Hamad","doi":"10.1080/10256016.2025.2550449","DOIUrl":"https://doi.org/10.1080/10256016.2025.2550449","url":null,"abstract":"<p><p>Naturally occurring radioactive gases in soil, such as radon, are recognized for their significant impact on local air quality and potential health risks to nearby populations. The disturbance of the Earth's surface through excavation activities can enhance the release of these gases, increasing the likelihood of radon exposure. This study investigates soil samples collected from various sites across the Halabja governorate in Iraq to provide a comprehensive evaluation of the area's radiological profile. The primary objective is to measure alpha emitter concentrations of radon, radium and uranium present in the soil. Alpha particle tracks emitted from radon gas were recorded using a CR-39 detector. To enlarge and reveal the alpha tracks, the samples underwent chemical etching using a 6.25 N NaOH solution at 70 °C for seven hours, after which the tracks were analysed under a microscope. The findings demonstrate that alpha emitter concentrations of ²²²Rn, ²²⁶Ra and ²³⁸U ranged from 119.76 to 228.55 Bq/m³, 0.22 to 0.42 Bq/kg and 2.92 to 5.57 ppm, respectively. These results were within the safe limit. Radiological hazard parameters for indoor and outdoor (annual effective dose, excess lifetime cancer risk and effective dose rate to different body organs) were computed to assess the health risks associated with selected soil samples. The results of the study indicate that the levels of alpha-emitting radionuclides in the soil samples are below the recommended safety thresholds, suggesting that the surveyed area does not pose a radiological hazard. These findings offer important baseline data to support Iraqi public health initiatives and radon management strategies.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-11"},"PeriodicalIF":1.4,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144954667","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":"Evaluation of the influence of soil types on the activity concentration of natural radionuclides in soil of Katsina State, Nigeria.","authors":"Abubakar Usman Lawal, Rabiu Nasiru, Nuraddeen Nasiru Garba","doi":"10.1080/10256016.2025.2551241","DOIUrl":"https://doi.org/10.1080/10256016.2025.2551241","url":null,"abstract":"<p><p>This study evaluated the influence of soil type on the activity concentrations of natural radionuclides and the potential radiological risk in soils of southern Katsina, Nigeria. The measured activity concentrations of ⁴⁰K, ²²⁶Ra, and ²³²Th in soil samples ranged between 61.46 and 709.93 Bq/kg, 5.55 and 129.78 Bq/kg, 14.98 and 474.27 Bq/kg, respectively. Radiological hazard parameters, including the absorbed dose (D_R), outdoor and indoor annual effective dose (OAED and IAED), and internal and external hazard indices (H_in and H_ex) were evaluated to determine the potential radiological risk. The mean values for D_R, OAED, IAED, H_in, and H_ex were 82.84 nGy/h, 97.34 µSv/y, 389.44 µSv/y, 0.56, and 0.48, respectively. Despite the average absorbed dose across the five soil types surpassing global average values, the findings from the mean radiological risk parameters for various soil types (including OAED, IAED, H_in, and H_ex) suggest minimal radiation risk to biological tissue from exposure. This research indicates an irregularity in the radionuclide concentration within the soil of the examined area, yet implies that the soil may not present an immediate health threat to humans.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-13"},"PeriodicalIF":1.4,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144954672","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}