Survey of Natural Radioactivity of Soil and Rock Samples and their Radiological Implications to Human Health in Ugwuele Quarry Mining Site, Uturu, Abia State, Nigeria

Journal of Applied Sciences and Environmental Management Pub Date : 2024-02-28 DOI:10.4314/jasem.v28i2.31

E. O. Echeweozo, K. K. Agwu, J. C. Ogada, P. Ike

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Abstract

This work measured the activity concentration of natural radionuclides 238U, 232Th and 40K in soil and rock samples collected in Ugwuele mining site and it surrounding communities in Uturu, Abia state, Nigeria. Fifteen different samples collected were analyzed. A NaI (Tl) spectrometry detector system was adopted for this research. The results obtained were used to estimate the radiological implication of the quarry mining in the study area. The average gamma activity obtained for 238U, 232Th and 40K in soil were 53.39 ± 3.08, 76.79 ± 9.66 and 1061.02 ± 15.72 Bq/kg respectively and 55.09 ± 5.71, 90.96 ± 16.10 and 1281.78 ± 6.38 Bq/kg respectively for rock samples. The calculated radiological hazard indices from Absorbed dose rate, Annual effective dose, Radium equivalent, internal hazard index and External hazard index gave 120.25 nGy/h, 0.147 msv/yr, 247.5 Bq/kg, 0.833 and 0.687 respectively. The average dose rate was higher than the recommended limit. Therefore, soil and rock materials found in Ugwuele could increase the radiological hazards on miners and residents of the area due to long time cumulative exposure.

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尼日利亚阿比亚州乌图鲁市 Ugwuele 采石场采矿点土壤和岩石样本的天然放射性及其对人类健康的辐射影响调查

这项研究测量了在尼日利亚阿比亚州乌图鲁的 Ugwuele 矿区及其周边社区采集的土壤和岩石样本中天然放射性核素 238U、232Th 和 40K 的放射性活度浓度。对收集到的 15 个不同样本进行了分析。研究采用了 NaI (Tl) 光谱检测系统。所得结果用于估算研究地区采石场开采的放射性影响。土壤样本中 238U、232Th 和 40K 的平均伽马活度分别为 53.39 ± 3.08、76.79 ± 9.66 和 1061.02 ± 15.72 Bq/kg；岩石样本中 238U、232Th 和 40K 的平均伽马活度分别为 55.09 ± 5.71、90.96 ± 16.10 和 1281.78 ± 6.38 Bq/kg。根据吸收剂量率、年有效剂量、镭当量、内部危害指数和外部危害指数计算得出的辐射危害指数分别为 120.25 nGy/h、0.147 msv/yr、247.5 Bq/kg、0.833 和 0.687。平均剂量率高于建议限值。因此，在 Ugwuele 发现的土壤和岩石材料可能会因长期累积照射而增加对矿工和该地区居民的放射性危害。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Journal of Applied Sciences and Environmental Management

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