Distribution characteristics of radionuclides (226Ra, 234U, and 238U) and ratios (226Ra/234U, 226Ra/238U, and 234U/238U) in quarry lake environment: experimental and model assessment

IF 1.7 3区化学 Q3 CHEMISTRY, ANALYTICAL Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2024-08-09 DOI:10.1007/s10967-024-09678-1

Van Thang Nguyen, Cong Hao Le

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Abstract

The abandonment of stone quarries establishes a quarry lake ecosystem that includes soil, water, fish, and vegetarian cover. The activity concentrations (ACs) of natural radionuclides in the waters of several quarry lakes worldwide have not been investigated. In addition, the features of radionuclides, such as distribution, seasonal variability, and health risks, have not been studied. In this study, the ACs of ²²⁶Ra, ²³⁴U, and ²³⁸U were measured in a typical quarry lake in Vietnam with an area of approximately 4000 m². The average ACs of ²²⁶Ra, ²³⁴U, and ²³⁸U were 8.3, 13.8, and 17.7 mBq L⁻¹, respectively. The ratios of ²²⁶Ra/²³⁴U, ²²⁶Ra/²³⁸U, and ²³⁴U/²³⁸U were 0.47, 0.6, and 0.79, respectively. A linear correlation was found between ACs and water depth. The ACs predicted by the QWASI (Quantitative Water, Air, Sediment Interaction) model agree with the measured values.

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采石湖环境中放射性核素（226Ra、234U 和 238U）的分布特征和比率（226Ra/234U、226Ra/238U 和 234U/238U）：实验和模型评估

石矿废弃后会形成一个石矿湖生态系统，包括土壤、水、鱼类和植被。目前尚未对全球多个采石场湖泊水体中天然放射性核素的放射性活度浓度（AC）进行调查。此外，放射性核素的分布、季节性变化和健康风险等特征也未得到研究。本研究在越南一个面积约为 4000 平方米的典型采石湖中测量了 226Ra、234U 和 238U 的 AC 值。226Ra、234U 和 238U 的平均 AC 分别为 8.3、13.8 和 17.7 mBq L-1。226Ra/234U、226Ra/238U 和 234U/238U 的比率分别为 0.47、0.6 和 0.79。ACs与水深之间呈线性相关。QWASI（定量水、空气、沉积物相互作用）模型预测的 AC 与测量值一致。

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来源期刊

Journal of Radioanalytical and Nuclear Chemistry 化学-分析化学

CiteScore

2.80

自引率

18.80%

发文量

504

审稿时长

2.2 months

期刊介绍： An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.