尼日利亚西南部奥贡州Ayetoro农场土壤和主要粮食作物中的天然放射性

Q4 Medicine

International Journal of Low Radiation Pub Date : 2017-10-31 DOI:10.1504/IJLR.2017.10008588

S. Alausa, O. O. Omotosho

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引用次数: 3

摘要

在尼日利亚的Ayetoro等沉积岩地区，食品和农田土壤中的放射性数据很少。玉米、木薯和地下土壤样本采集自Ayetoro。用伽马能谱仪测定了样品中的40K、226Ra和232Th活度浓度。评估了土壤到粮食作物的转移因子、作物的摄入有效剂量率和土壤的室外有效剂量率。玉米40K、226Ra和232Th的平均活性浓度分别为160.3±66.5 Bqkg - 1、18.1±7.1 Bqkg - 1和15.0±8.0 Bqkg - 1，土壤40K、226Ra和232Th的平均活性浓度分别为671.5±352.9 Bqkg - 1、66.8±25.3 Bqkg - 1和62.1±27.9 Bqkg - 1。40K、226Ra和232Th在木薯中的平均活性浓度分别为294.6±137.2 Bqkg−1、28.6±14.9 Bqkg−1和18.2±13.0 Bqkg−1，土壤中40K、226Ra和232Th的平均活性浓度分别为679.5±281.1 Bqkg−1、66.8±32.7 Bqkg−1和49.7±46.9 Bqkg−1。结果表明，活性浓度、摄入有效剂量和室外有效剂量均较低，预计不会造成严重的放射性健康影响。

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Natural radioactivity in farm soils and major food crops grown in Ayetoro, Ogun State, Southwestern Nigeria

Radioactivity data in food and farm soil in sedimentary rocky areas like Ayetoro, Nigeria, are scarce. Maize, cassava and the underneath soil samples were collected from Ayetoro. The 40K, 226Ra and 232Th activity concentrations in the samples were measured with a gamma ray spectrometer. The soil-to-food crop transfer factors, ingestion effective dose rates due to the crops and the outdoor effective dose rates due to soils were evaluated. The mean 40K, 226Ra and 232Th activity concentrations in maize were 160.3 ± 66.5 Bqkg−1, 18.1 ± 7.1 Bqkg−1 and 15.0 ± 8.0 Bqkg−1 respectively and the soils were 671.5 ± 352.9 Bqkg−1, 66.8 ± 25.3 Bqkg−1 and 62.1 ± 27.9 Bqkg−1 for 40K, 226Ra and 232Th respectively. The mean activity concentrations in cassava were 294.6 ± 137.2 Bqkg−1, 28.6 ± 14.9 Bqkg−1 and 18.2 ± 13.0 Bqkg−1 for 40K, 226Ra and 232Th respectively and the soils were 679.5 ± 281.1 Bqkg−1, 66.8 ± 32.7 Bqkg−1 and 49.7 ± 46.9 Bqkg−1 for 40K, 226Ra and 232Th respectively. The results indicated that the activity concentrations, ingestion effective dose and outdoor effective dose are low and no serious radiological health impact is expected.

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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.