对埃及市售大理石和花岗岩尾石可能造成的放射性危害进行评估

Q4 Medicine

International Journal of Low Radiation Pub Date : 2016-01-01 DOI:10.1504/IJLR.2016.10002420

A. Mostafa

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引用次数: 0

摘要

本文报道了埃及用于建筑覆盖材料的不同类型的本地和进口大理石和花岗岩砖的天然放射性和可能的放射性危害。用伽马能谱法测定了226Ra、232Th和40K的活度浓度。在226Ra、232Th和40K中，大理岩的Bq - kg -1分别为15 ~ 73,29 ~ 203,50 ~ 253bq - kg -1，花岗岩的Bq - kg -1分别为23 ~ 179,78 ~ 317,113 ~ 1207。采用间接方法计算氡的呼出率，得到的数值分别为2.1 ~ 9.7 Bq m−2 h−1和3 ~ 23.9 Bq m−2 h−1。还估计了大理石和花岗岩样品引起的室内氡浓度。在正常通风(0.5 h−1)下，获得的数值低于世界卫生组织推荐的参考水平(100 Bq m−3)。大多数外部年剂量和室内氡暴露(ERn)引起的年剂量值在推荐范围内。

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Assessment of the possible radiological hazard caused from marble and granite tails commercially available in Egypt

This paper reports the natural radioactivity and possible radiological hazards in different types of local and imported marble and granite tiles used as covering building materials in Egypt. Gamma-ray spectrometry was used to estimate the 226Ra, 232Th and 40K activity concentrations. The obtained values were found in the ranges 15-73, 29-203, and 50-253 Bq kg−1 in marbles and 23-179, 78-317, 113-1207 Bq kg−1 in granites for 226Ra, 232Th and 40K, respectively. Using indirect methods radon exhalation rates were calculated, the obtained values varied from 2.1 to 9.7 and from 3-23.9 Bq m−2 h−1 for marble and granite samples, respectively. Radon concentrations in the room caused by marble and granite samples were also estimated. Under normal ventilation (0.5 h−1), the obtained values were below reference level (100 Bq m−3) recommended by World Health Organization. Most values of external annual dose and annual doses due to the indoor radon exposure (ERn) were within recommended.

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来源期刊

International Journal of Low Radiation Environmental Science-Health, Toxicology and Mutagenesis

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期刊介绍： The IJLR is a peer-reviewed journal dedicated to the publication of research articles, review papers and technical notes in all domains related to low-dose radiation, among which are the biological and health effects in humans and the biota, in vitro and in vivo research on low radiation effects, regulatory and policy aspects, risk estimation and public perception.