Assessment of radioactivity in soil samples from Wolaita Sodo town, Ethiopia: implications for environmental and public health.

IF 0.8 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES

Radiation protection dosimetry Pub Date : 2025-03-06 DOI:10.1093/rpd/ncaf002

Nigus Maregu Demewoz, Lingerew Nebere Kassie, Hailu Geremew Zeleke

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Abstract

This study assesses the activity concentrations of the radionuclides 238U, 232Th, and 40K in soil samples collected from Wolaita Sodo town, located in the Southern Nations, Nationalities, and Peoples' (SNNP) Region, Ethiopia. A gamma-ray spectrometer equipped with a NaI(Tl) detector was used for the measurements. The concentrations of 238U, 232Th, and 40K varied from 3.25 ± 1.5 to 13.84 ± 2.2 Bq.kg-1, 0.4 ± 0.9 to 85.12 ± 3.4 Bq.kg-1, and 34.43 ± 2.7 to 748.07 ± 5.9 Bq.kg-1, respectively. The average activity concentrations were 7.83 ± 1.9 Bq.kg-1, 40.74 ± 2.7 Bq.kg-1, and 161.63 ± 3.9 Bq.kg-1 for 238U, 232Th, and 40K, respectively. The average radium equivalent activity was 192.25 Bq.kg-1, well below the recommended safety limit of 370 Bq.kg-1. The average gamma dose rate, and annual effective dose rate were 35.68 nGy.h-1, and 0.18 mSv.y-1, respectively. The internal and external indexes are below the recommended limit set by UNSCEAR and ICRP. However, the estimated excess lifetime cancer risk and indoor radon concentrations are slightly higher. Despite this, the overall radiological impact on the environment and public health in the study area remains negligible. This study provides valuable baseline data for radiation protection and informs urban and environmental policy in the region.

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埃塞俄比亚Wolaita Sodo镇土壤样品放射性评估：对环境和公共卫生的影响。

本研究评估了在埃塞俄比亚南部国家、民族和民族（SNNP）地区Wolaita Sodo镇收集的土壤样品中放射性核素238U、232Th和40K的活性浓度。使用配备NaI（Tl）探测器的伽马射线光谱仪进行测量。238U、232Th和40K的浓度变化范围为3.25±1.5 ~ 13.84±2.2 Bq。kg-1, 0.4±0.9至85.12±3.4 Bq。kg-1, 34.43±2.7 ~ 748.07±5.9 Bq。公斤,分别。平均活性浓度为7.83±1.9 Bq。kg-1, 40.74±2.7 Bq。kg-1, 161.63±3.9 Bq。238U、232Th和40K分别为kg-1。平均镭当量活度为192.25 Bq。远低于370 Bq.kg-1的建议安全限值。平均γ剂量率为35.68 nGy.h-1，年有效剂量率为0.18 mSv。分别y-1。内部和外部指数都低于科委会和红十字国际委员会规定的建议限度。然而，估计的终生癌症风险和室内氡浓度略高。尽管如此，对研究地区的环境和公众健康的总体辐射影响仍然可以忽略不计。这项研究为辐射防护提供了宝贵的基线数据，并为该地区的城市和环境政策提供了信息。

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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来源期刊

Radiation protection dosimetry 环境科学-公共卫生、环境卫生与职业卫生

CiteScore

1.40

自引率

10.00%

发文量

223

审稿时长

6-12 weeks

期刊介绍： Radiation Protection Dosimetry covers all aspects of personal and environmental dosimetry and monitoring, for both ionising and non-ionising radiations. This includes biological aspects, physical concepts, biophysical dosimetry, external and internal personal dosimetry and monitoring, environmental and workplace monitoring, accident dosimetry, and dosimetry related to the protection of patients. Particular emphasis is placed on papers covering the fundamentals of dosimetry; units, radiation quantities and conversion factors. Papers covering archaeological dating are included only if the fundamental measurement method or technique, such as thermoluminescence, has direct application to personal dosimetry measurements. Papers covering the dosimetric aspects of radon or other naturally occurring radioactive materials and low level radiation are included. Animal experiments and ecological sample measurements are not included unless there is a significant relevant content reason.