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基于受体模型的来源追踪和跨境喜马拉雅河流沉积物中的元素风险评估

Rahat Khan¹, Amit Hasan Anik², Shabiha Hossain²

¹Institute of Nuclear Science & Technology, Bangladesh Atomic Energy Commission, Savar, Dhaka, 1349, Bangladesh.

|August 6, 2023

概括

这项研究分析了15种元素的布拉马普特拉河沉积物,发现大部分是自然来源. 虽然一些和显示出人为影响,但整体生态风险很小.

科学领域:

环境地质化学环境地质化学
河流沉积物分析
生态毒理学生态毒理学

背景情况:

像布拉马普特拉这样的跨境河流对于沉积物地质化学至关重要,但研究不足.
了解元素源对于评估河流生态系统的生态影响至关重要.

研究的目的:

确定布拉马普特拉河表面沉积物中15种地化学重要元素的丰度和来源.
预测元素分布的生态后果.
要区分自然和人为的对沉积物组成的贡献.

主要方法:

仪器中子激活分析 (INAA) 用于元素度的确定.
计算环境指数 (例如,污染负载指数).
积极矩阵因子化 (PMF) 模型用于源分配的应用.

主要成果:

与页岩相比,卢比 (Rb), (Cs), (Th) 和 (U) 的度较高.
沉积物污染状态从未被污染到中度被污染不等.
在60%的样本中, (Cr) 超过了值效应水平 (TEL),这表明了潜在的罕见生物效应.
生态风险评估表明大多数分析元素的生态毒理风险很小或不存在.
阳性矩阵因子化 (PMF) 确定地质/地来源 (∼72.69%) 为主,而人为来源的贡献明显较小 (∼27.31%).
(Cr) 和 (Mn) 的丰度主要受到人类活动的影响.

结论:

布拉马普特拉河沉积物主要受到自然 (地质) 源的影响.
人类输入,虽然较低,但显著影响特定元素,如Cr和Mn.
地质环境指南和受体模型是对河流沉积物的来源歧视的有效工具.

关键词:

孟加拉国孟加拉国孟加拉国布拉赫马普特拉河是布拉赫马普特拉河的一条河流.基本的分数是基本的分数.地质和非地起源.风险评估风险评估风险评估沉积物的质量评估沉积物质量评估来源追踪追踪来源

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