尼日利亚西南部奥克-奥贡地区土壤放射性、室内氡浓度水平及其相关性的测定

Q4 Medicine

International Journal of Low Radiation Pub Date : 2016-01-01 DOI:10.1504/IJLR.2016.10002362

A. Ademola, R. Obed

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引用次数: 0

摘要

在奥克-奥贡地区(尼日利亚西南部)对116个房间的室内氡浓度进行了测量，并对房间周围土壤样品进行了伽马活度测量。土壤中40K、232Th和238U的平均活性浓度分别为3±5、25±7和212±99 Bqkg−1。估计的平均吸收剂量率(D)和有效剂量分别为44±8 nGy h−1和45±8 μSv y−1。室内氡浓度为148 ~ 627 Bqm−3，平均值为282±99 Bqm−3。估计年平均有效剂量为7±2毫西弗y - 1。因此，建议研究地区的居民定期给房屋通风，以减少患肺癌的可能风险。室内氡浓度与土壤样品中238U/226Ra活性呈良好的相关关系(R²= 0.702)。

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Determinations of soil radioactivity, indoor radon concentration levels and their correlation in Oke-Ogun area, Southwestern Nigeria

Indoor radon concentration measurements in 116 rooms and gamma activity measurements in the soil samples around the rooms were carried out in Oke-Ogun area (Southwestern, Nigeria). The mean activity concentrations of 40K, 232Th, and 238U in the soil were 3±5, 25±7 and 212±99 Bqkg−1, respectively. The mean absorbed dose rate (D) and the effective dose estimated were 44±8 nGy h−1 and 45±8 μSv y−1, respectively. Radon concentrations in the rooms varied from 148 Bqm−3 to 627 Bqm−3 with mean of 282±99 Bqm−3. The estimated mean annual effective dose is 7±2 mSv y−1. It is therefore advisable for the inhabitants of the study area to ventilate their houses regularly, to reduce the possible risk of contracting lung cancer. Radon concentration in the rooms surveyed show a good correlation (R² = 0.702) with 238U/226Ra activity in soil samples.

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来源期刊

International Journal of Low Radiation Environmental Science-Health, Toxicology and Mutagenesis

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期刊介绍： The IJLR is a peer-reviewed journal dedicated to the publication of research articles, review papers and technical notes in all domains related to low-dose radiation, among which are the biological and health effects in humans and the biota, in vitro and in vivo research on low radiation effects, regulatory and policy aspects, risk estimation and public perception.