Determination of natural radioactivity and hazard in soil samples in and around gold mining area in Itagunmodi, south-western, Nigeria
Determination of natural radioactivity and hazard in soil samples in and around gold mining area in Itagunmodi, south-western, Nigeria
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DOI：
10.1016/j.jrras.2014.06.001
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发表时间：
2014-07-01
影响因子：
1.7
通讯作者：
Adejumobi, Adeniyi Caleb
中科院分区：
文献类型：
--
作者：
Ademola, Augustine Kolapo;Bello, Adekunle Kazeem;Adejumobi, Adeniyi Caleb
采用碘化钠γ能谱法测定了伊塔贡莫迪金矿区土壤样品中天然放射性核素U-238、Th-232和K-40的活度浓度。对这些天然放射性核素进行了放射性危害评估。在矿区测定的238 U、232 Th和40 K的平均活度浓度分别为55.3 +/- 1.2、26.4 +/- 2.7和505.1 +/- 7.1 Bqkg（-1），而在正常生活区分别为8.8 +/- 1.9，17.5 +/- 2.7和102.8 +/- 12.1 Bqkg（-1）。矿区的年平均有效剂量为81.3 mSv，比世界平均水平高出约16%。研究区的平均镭当量活度浓度、平均外部和内部危害指数均低于世界平均水平。因此，Itagunmodi的采矿活动不会对公众造成放射性危害。Copyright（C）2014，The Egyptian Society of Radiation Sciences and Applications. Elsevier B. V.制作和主持。保留所有权利。
The activity concentrations of natural radionuclides U-238, Th-232 and K-40 in soil samples from the gold mining area in Itagunmodi were measured by gamma spectrometry using Sodium Iodide detector. Radiological hazard assessments due to these natural radionuclides were carried out. The average activity concentrations of 238U, 232Th and 40K determined in the mining sites were 55.3 +/- 1.2, 26.4 +/- 2.7 and 505.1 +/- 7.1 Bqkg(-1), respectively while in the normal living areas it was respectively 8.8 +/- 1.9, 17.5 +/- 2.7 and 102.8 +/- 12.1 Bqkg(-1). The mean annual effective dose in the mining site was 81.3 mSv which is about 16% higher than the world average. The mean radium equivalent activity concentration, the mean external and internal hazard indices in the study areawere less than the world averages. Therefore, mining activities in Itagunmodi poses no radiological hazard to the general public. Copyright (C) 2014, The Egyptian Society of Radiation Sciences and Applications. Production and hosting by Elsevier B.V. All rights reserved.