肯尼亚卡卡梅加县Rosterman金矿尾矿样本的自然放射性和外剂量率

Journal of Engineering and Technology for Industrial Applications Pub Date : 2020-12-11 DOI:10.5935/jetia.v6i26.718

C. Wanyama, J. Makokha, F. Masinde, M. N. Waswa

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引用次数: 0

摘要

本文对肯尼亚卡卡梅加县Rosterman金矿尾矿中天然放射性核素浓度进行了评价。按标准取样程序采集了Rosterman金矿30份尾矿样品，用NaI (TI) γ -射线能谱分析了其中的238U、232Th和40K。238U、232Th和40K的活性变化范围分别为39±1.63 ~ 118±4.43 Bq/Kg、72±2.24 Bq/Kg ~ 223±8.36 Bq/Kg和85±3.6 Bq/Kg ~ 362±10.65 Bq/Kg。所有样品的镭当量活度均低于370 Bq/Kg。根据沉积物中放射性核素水平估计的外部伽马剂量率范围为32±3.4 nGy/h至68±5.83 nGy/h。因此，在Rosterman开采黄金对普通民众和矿工的健康影响微乎其微。

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Natural radioactivity and external dose rates in tailing samples from Rosterman gold mine, Kakamega county, Kenya

In this article, documented results of natural radionuclide concentrations in tailings at Rosterman gold mine, Kakamega county, Kenya were evaluated. Thirty tailing samples from Rosterman gold mine were collected as per standard sampling procedures and were analyzed for 238U, 232Th and 40K by NaI (TI) gamma-ray spectroscopy. The activities of 238U, 232Th and 40K was found to vary from 39 ± 1.63 Bq/Kg to 118 ± 4.43 Bq/Kg, 72 ± 2.24 Bq/Kg to 223 ± 8.36 Bq/Kg and 85 ± 3.6 Bq/Kg to 362 ± 10.65 Bq/Kg respectively. Radium equivalent activities were found below 370 Bq/Kg in all the collected samples. External gamma dose rates estimated from the levels of radionuclides in sediments had a range of 32 ± 3.4 nGy/h to 68 ± 5.83 nGy/h. Hence, mining of gold at Rosterman has minimal significant health implications to the general population and the miners.

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来源期刊

Journal of Engineering and Technology for Industrial Applications

CiteScore

0.60

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0.00%

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