加纳中部地区海岸角市北地区土壤和水中天然放射性的辐射影响评估。

Radiological impact assessment of natural radioactivity in soil and water in Cape Coast North, Central Region of Ghana.

机构信息

National Nuclear Research Institute, Ghana Atomic Energy Commission, Box LG 80, Legon-Accra, +233/0303, Ghana.

Department of Physics, School of Physical Sciences, University of Cape Coast, Cape Coast, +233/0332, Ghana.

出版信息

Radiat Prot Dosimetry. 2024 Sep 19;200(15):1450-1461. doi: 10.1093/rpd/ncae188.

DOI:10.1093/rpd/ncae188

PMID:39242111

Abstract

The objective of the study is to evaluate natural radioactivity and its radiological impact on the health of the populace within Cape Coast North. Soil and water samples were taken and analysed using a high purity germanium (HPGe) detector. Results for the average activity concentrations of 226Ra, 232Th, and 40K in soil samples range from 15.0 to 60.8 Bq/kg with a mean of 20.9 ± 7.2 Bq/kg, 16.3 to 97.2 Bq/kg with a mean of 43.8 ± 2.4 Bq/kg, and 4.7 to 411.4 Bq/kg with an average of 140.6 ± 4.2 Bq/kg, respectively. The absorbed dose rate in air and outdoor annual effective dose to the public were estimated to be 46.6 nGyh-1 and 0.1 mSv, respectively, which fell below the recommended average. The average activity concentrations of 226Ra, 232Th, and 40K in water samples were 1.4, 0.4, and 1.2 Bq/L, respectively. The annual effective dose is 0.4 mSv, which is greater than the WHO recommended level of 0.1 mSv/y.

摘要

本研究旨在评估自然放射性及其对 Cape Coast North 地区居民健康的放射性影响。采集了土壤和水样，并使用高纯锗（HPGe）探测器进行了分析。土壤样品中 226Ra、232Th 和 40K 的平均活度浓度范围为 15.0 至 60.8 Bq/kg，平均值为 20.9 ± 7.2 Bq/kg；43.8 ± 2.4 Bq/kg，范围为 16.3 至 97.2 Bq/kg；平均值为 140.6 ± 4.2 Bq/kg，范围为 4.7 至 411.4 Bq/kg。空气中的吸收剂量率和公众的室外年有效剂量分别估计为 46.6 nGyh-1 和 0.1 mSv，均低于建议的平均值。水样中 226Ra、232Th 和 40K 的平均活度浓度分别为 1.4、0.4 和 1.2 Bq/L。年有效剂量为 0.4 mSv，大于世界卫生组织建议的 0.1 mSv/y 水平。