从土壤到茶叶的放射性核素转移以及马来西亚民众的相应剂量。

IF 1.6 3区 工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR
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引用次数: 0

摘要

现在最受欢迎的提神饮料之一是茶,主要在马来西亚使用。种植茶树的相关土壤中的天然放射性在决定茶叶中是否含有放射性核素方面起着重要作用。本研究评估了放射性核素从土壤到茶叶的转移,然后估算了通过饮用茶叶而承诺的有效剂量。茶叶和相关土壤取自马来西亚金马仑高原最大的茶叶种植区。市场上销售的粉末状茶叶来自吉隆坡的超市。HPGe 伽马射线光谱仪用于测定茶叶中长寿命放射性物质的普遍浓度。茶叶土壤中 226Ra、232Th 和 40K 的放射性浓度分别为 49-101.7 Bq kg-1、74.5-124.1 Bq kg-1 和 79.6-423.2 Bq kg-1,而茶叶中的相应数值分别为 14.4-23.8 Bq kg-1、12.9-29.5 Bq kg-1 和 297-387.5 Bq kg-1。放射性核素的转移因子显示了典型值(40K.茶叶消耗阈值表明,为避免对健康产生负面影响,每天的茶叶消耗量不应超过 67 克(泡一杯茶需要约 4 克茶叶,因此每天 17 杯)。研究发现,饮用茶叶所产生的承诺有效剂量(5.18-6.08 μSv y-1)低于联合国原子辐射影响问题科学委员会(2000 年)关于食品的参考剂量指导限值(290 μSv y-1);不过,应当注意的是,该指导限值是针对所有食品的总体建议。这项研究提供了马来西亚茶叶中天然放射性的数据,可能有助于人们管理健康的生活方式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Radionuclides transfer from soil-to-tea leaves and concomitant doses to the Malaysian populace

One of the most well-liked energizing drinks is now tea, which is primarily used in Malaysia. The natural radioactivity in the associated soils where tea plants are cultivated plays a major role in determining the presence of radionuclides in tea leaves. The present study assesses the transfer of radionuclides from soil-to-tea leaves and then estimates the committed effective doses through tea consumption. Tea leaves and the associated soils were obtained from the largest tea plantation area, which is located in the Cameron Highlands, Malaysia. The marketed tea leaves in powdered form were obtained from the supermarkets in Kuala Lumpur. HPGe gamma-ray spectrometry was used to determine the prevailing concentrations of long-lived radioactive materials in tea leaves. Activity concentrations of 226Ra, 232Th, and 40K in tea soils ranged from 49 to 101.7 Bq kg−1, 74.5–124.1 Bq kg−1 and 79.6–423.2 Bq kg−1, respectively, while the respective values in tea leaves are 14.4–23.8 Bq kg−1, 12.9–29.5 Bq kg−1 and 297–387.5 Bq kg−1. Transfer factors of radionuclides showed typical values (<1.0) except for the 40K. The threshold tea consumption rates suggest that one should not consume more than 67 g of tea leaves per day (around 4 g of tea leaves are needed for making 1 cup of tea, so 17 cups per day) to avoid negative health effects. Committed effective doses due to tea consumption are found to be lower (5.18–6.08 μSv y−1) than the United Nations Scientific Committee on the Effects of Atomic Radiation (2000) reference dose guidance limit of 290 μSv y−1 for foodstuffs; however, it should be noted that the guidance limit is recommended for all foodstuffs collectively. Providing data on natural radioactivity in tea leaves grown in Malaysia, this study may help people manage a healthy lifestyle.

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来源期刊
Applied Radiation and Isotopes
Applied Radiation and Isotopes 工程技术-核科学技术
CiteScore
3.00
自引率
12.50%
发文量
406
审稿时长
13.5 months
期刊介绍: Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.
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