Natural radioactivity levels in some vegetables and fruits commonly used in Najaf Governorate, Iraq

A. Abojassim, H. Hady, Z. Mohammed
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引用次数: 22

Abstract

Radioactivity in Food may be contaminated with radioactive materials due to the natural and a nuclear emergency. The vegetables and fruits will become radioactive by deposit of radioactive materials falling on that from the air or through rain water. The aims of the present work were to measure the specific activity and annual effective dose as a result of the intake of vegetables and fruits collected from local market in Najaf governorate. Natural radioactivity was measured in samples using gamma ray spectrometer in this study. The results show that the average specific activities in vegetables samples for 238 U, 232 Th and 40 K were 5.21, 4.76, and 186.15 Bq kg -1 , respectively, the average specific activities for 232 Th, 40 K in fruit samples were 2.53, 211.64 Bq kg -1 , while the total average annual effective dose in vegetables samples for adults, children (10 years old) and infants is estimated to be 0.117, 0.122, and 0.179 mSv, respectively, while the total average annual effective dose in fruit samples for adults, children (10 years old) and infants is estimated to be 0.141, 0.295, and 0.388 mSv, respectively. The values found for specific activity and the annual effective dose in all samples in this study were lower than worldwide median values for all groups according to UNSCEAR (2000) and ICRP (1996) respectively; therefore, these values are found to be safe.
伊拉克纳杰夫省一些常用蔬菜和水果的天然放射性水平
食品中的放射性物质在自然灾害和核事故中可能受到放射性物质的污染。蔬菜和水果会因为空气中或雨水中落下的放射性物质的沉淀而变得具有放射性。本工作的目的是测量从纳杰夫省当地市场收集的蔬菜和水果的摄入所造成的比活度和年有效剂量。本研究用伽马射线谱仪测定了样品的天然放射性。结果表明,蔬菜样品中238 U、232 Th和40 K的平均比活度分别为5.21、4.76和186.15 Bq kg -1,水果样品中232 Th和40 K的平均比活度分别为2.53、211.64 Bq kg -1,而蔬菜样品中成人、儿童(10岁)和婴儿的年平均有效剂量分别为0.117、0.122和0.179 mSv。而水果样品中对成人、儿童(10岁)和婴儿的年平均有效剂量估计分别为0.141、0.295和0.388毫西弗。本研究中所有样品的比活度和年有效剂量值分别低于联合国辐射科委会(2000年)和ICRP(1996年)的世界范围内所有组的中位数;因此,这些值是安全的。
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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