Natural radioactivity levels in benthic foraminifera Sorites marginalis as a pollution indicator.

IF 1.1 4区环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Isotopes in Environmental and Health Studies Pub Date : 2021-12-01 Epub Date: 2021-09-22 DOI:10.1080/10256016.2021.1974854

Wafaa Rashed, Khaled Salahel Din, Mohamed Youssef

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引用次数: 1

Abstract

Sorites marginalis as one of the benthic foraminifer's genera were collected from three coastal lagoons (Abu Shaar, Umm al-Huwaytāt, and Marsa Shūni) on the Egyptian Red Sea coast and investigated for their ²²⁶Ra, ²³²Th, and ⁴⁰K content using HPGe gamma-ray spectrometry. S. marginalis shells show high radioactivity levels with average activity concentration values of 251.8 ± 18.3, 86.8 ± 7.7, and 791.2 ± 57.6 Bq kg^-1, 327.1 ± 11.4, 97.4 ± 7.1, and 751.6 ± 54.7 Bq kg^-1, 246.6 ± 17.7, 65.1 ± 4.8, and 477.6 ± 34.8 Bq kg^-1 for ²²⁶Ra, ²³²Th, and ⁴⁰K in the samples from Abu Shaar, Umm al-Huwaytāt, and Marsa Shūni, respectively. ²²⁶Ra and ⁴⁰K have a high tendency to accumulate in S. marginalis compared to ²³²Th. High bioaccumulation of the studied radionuclides was found for samples from Umm al-Huwaytāt and Abu Shaar lagoons. Radiological parameters such as radium equivalent activity, gamma absorbed dose rate in air, and outdoor annual effective dose were calculated, and values higher than the permissible limits were obtained. Based on the obtained results, the estimation of radioactivity levels in S. marginalis shells may serve as an indicator of marine environment pollution.

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底栖有孔虫(Sorites marginalis)天然放射性水平作为污染指标。

本文从埃及红海沿岸的Abu Shaar、Umm al-Huwaytāt和Marsa Shūni三个沿海泻湖采集了底底有孔虫属Sorites marginalis，并利用HPGe γ -射线能谱法测定了其226Ra、232Th和40K的含量。Abu Shaar、Umm al-Huwaytāt和Marsa Shūni样品中226Ra、232Th和40K的平均活度浓度分别为251.8±18.3、86.8±7.7和791.2±57.6 Bq kg-1、327.1±11.4、97.4±7.1和751.6±54.7 Bq kg-1、246.6±17.7、65.1±4.8和477.6±34.8 Bq kg-1。与232Th相比，226Ra和40K在边缘草中积累的倾向更高。所研究的放射性核素在Umm al-Huwaytāt和Abu Shaar泻湖的样本中发现了高度的生物积累。计算了镭当量活度、空气中伽马吸收剂量率和室外年有效剂量等放射学参数，得到了高于允许限值的数值。根据所获得的结果，边角螺壳放射性水平的估计可以作为海洋环境污染的一个指标。

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

Isotopes in Environmental and Health Studies 环境科学-环境科学

CiteScore

2.80

自引率

7.70%

发文量

审稿时长

3.0 months

期刊介绍： Isotopes in Environmental and Health Studies provides a unique platform for stable isotope studies in geological and life sciences, with emphasis on ecology. The international journal publishes original research papers, review articles, short communications, and book reviews relating to the following topics: -variations in natural isotope abundance (isotope ecology, isotope biochemistry, isotope hydrology, isotope geology) -stable isotope tracer techniques to follow the fate of certain substances in soil, water, plants, animals and in the human body -isotope effects and tracer theory linked with mathematical modelling -isotope measurement methods and equipment with respect to environmental and health research -diagnostic stable isotope application in medicine and in health studies -environmental sources of ionizing radiation and its effects on all living matter