Soil-to-plant transfer factors of uranium and thorium in mining and non-mining districts of Ghana

IF 1.9 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of environmental radioactivity Pub Date : 2024-11-14 DOI:10.1016/j.jenvrad.2024.107566

Edward Ankapong , Opoku Gyamfi , Victor Agyei , Matt Dodd , Osei Akoto , Godfred Darko

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Abstract

The activity concentrations of natural radionuclides in water, soil, cassava, cocoyam and yam grown in two mining districts and a non-mining district in Ghana were determined using a high-resolution gamma spectroscopy system with high-purity germanium detector. The estimated absorbed dose for soil from Amansie, Konongo, and Mampong were 206 nGy/h, 224 nGy/h and 198 nGy/h, respectively, which were all above 60 nGy/h set by the United Nations Scientific Committee on the Effects of Atomic Radiation. The soil-to-plant transfer factors (TF) for ²³⁸U, ²³²Th, and ⁴⁰K ranged from 0.11 to 1.11, 0.03 to 2.39, and 0.03 to 22.07, respectively. The results showed that the highest TF for ²³⁸U and ²³²Th were 1.11 and 2.39, respectively in cassava. There was no significant variation in the TF of ²³⁸U and ²³²Th among the soils in the different communities. The estimated transfer factors for ²³⁸U and ²³²Th for cassava, cocoyam and yam were higher than that reported by the International Atomic Energy Agency.

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加纳采矿区和非采矿区土壤中铀和钍向植物的转移因子。

利用配备高纯锗探测器的高分辨率伽马能谱系统，测定了加纳两个矿区和一个非矿区的水、土壤、木薯、椰子和山药中天然放射性核素的放射性活度浓度。估计 Amansie、Konongo 和 Mampong 土壤的吸收剂量分别为 206 nGy/h、224 nGy/h 和 198 nGy/h，均高于联合国原子辐射影响问题科学委员会设定的 60 nGy/h。2³⁸U、2³2Th 和⁴⁰K 的土壤-植物转移因子（TF）分别为 0.11 至 1.11、0.03 至 2.39 和 0.03 至 22.07。结果表明，木薯中 238U 和 232Th 的最高 TF 分别为 1.11 和 2.39。不同群落土壤中 238U 和 232Th 的转移因子没有明显差异。木薯、椰子和山药中 238U 和 232Th 的估计转移因子高于国际原子能机构的报告。

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来源期刊

Journal of environmental radioactivity 环境科学-环境科学

CiteScore

4.70

自引率

13.00%

发文量

209

审稿时长

73 days

期刊介绍： The Journal of Environmental Radioactivity provides a coherent international forum for publication of original research or review papers on any aspect of the occurrence of radioactivity in natural systems. Relevant subject areas range from applications of environmental radionuclides as mechanistic or timescale tracers of natural processes to assessments of the radioecological or radiological effects of ambient radioactivity. Papers deal with naturally occurring nuclides or with those created and released by man through nuclear weapons manufacture and testing, energy production, fuel-cycle technology, etc. Reports on radioactivity in the oceans, sediments, rivers, lakes, groundwaters, soils, atmosphere and all divisions of the biosphere are welcomed, but these should not simply be of a monitoring nature unless the data are particularly innovative.