Measurement of Natural Radioactivity in Lagoon Sands Used in Construction in the District of Abidjan, Côte d’Ivoire

Olkalé Jean-Claude Brigui, T. Dali, K. Djagouri, B. L. Gogon, S. Penabei, A. A. Koua, G. A. Monnehan
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引用次数: 1

Abstract

Sand is an important natural material for the construction of houses, work buildings and other public spaces. This work, which is one of the first contributions to the environmental quality of construction materials, concerns the measurement of natural radioactivity in the lagoon sands collected in the district of Abidjan. Nineteen (19) samples of these sands are analyzed by gam-ma-ray spectrometry equipped with HPGe detector. The mean values obtained for 226 Ra, 232 Th and 40 K are respectively 7.76 ± 1.84 Bq·kg −1 , 5.21 ± 1.36 Bq·kg −1 , and 217.31 ± 5.03 Bq·kg −1 . The estimated average value of radium equivalent (Raeq) is 31.94 Bq·kg −1 . The results show that the average values obtained are far lower than the global limits of 35, 30, and 400 Bq·kg −1 for the concentrations of 226 Ra, 232 Th and 40 K, respectively, and 370 Bq·kg −1 for the equivalent radium established by the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR). Therefore, the use of the analyzed lagoon sand samples in the different construction sectors should not cause serious radiological effects on the populations living in the District of Abidjan. Our results provide new data on building materials radioactivity in Côte d’Ivoire and all over the World. They can also be used as a reference for future work.
在阿比让地区用于建筑的泻湖砂中天然放射性的测量,Côte科特迪瓦
沙子是建造房屋、工作建筑和其他公共空间的重要天然材料。这项工作是对建筑材料环境质量的最初贡献之一,涉及测量在阿比让地区收集的泻湖砂的天然放射性。这些沙子的19(19)个样品被配备了HPGe探测器的伽马射线能谱分析。226 Ra、232 Th和40 K的平均值分别为7.76±1.84 Bq·kg - 1、5.21±1.36 Bq·kg - 1和217.31±5.03 Bq·kg - 1。估算的镭当量(Raeq)平均值为31.94 Bq·kg−1。结果表明,所得平均值远低于226 Ra、232 Th和40 K浓度的全球限值35、30和400 Bq·kg−1,也远低于联合国原子辐射效应科学委员会(UNSCEAR)规定的当量镭的全球限值370 Bq·kg−1。因此,在不同建筑部门使用经分析的泻湖砂样不应对居住在阿比让区的居民造成严重的放射性影响。我们的研究结果为Côte科特迪瓦和世界各地的建筑材料放射性提供了新的数据。也可作为今后工作的参考。
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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