重金属污染,基于受体模型的来源识别,高度发达城市道路灰尘中的特定源生态和健康风险
Mukta Das1, Ram Proshad2,3, Krishno Chandra4
1Department of Zoology, Government Saadat College, Tangail, 1903, Bangladesh.
Environmental geochemistry and health
|September 8, 2023
概括
这项研究分析了孟加拉国坦加尔 (Tangail) 的重金属,发现了交通排放造成的严重污染和可能的癌症风险. 检测到高水平的铜,,和,突出显示了环境和健康方面的担忧.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 公共卫生 公共卫生
背景情况:
- 道路灰尘是城市环境中重金属的重要储备.
- 了解重金属污染的来源和风险对于环境管理和公共卫生至关重要.
- 孟加拉国之前的研究还没有完全阐明道路灰尘中的重金属的具体来源和相关风险.
研究的目的:
- 在孟加拉国Tangail的道路灰尘中量化Ni,Cu,Cr,Pb,Cd,As,Zn和Fe的含量.
- 通过正矩阵分解 (PMF) 模型识别这些重金属的来源.
- 评估与已确定来源相关的生态和人类健康风险.
主要方法:
- 感应合等离子体质谱 (ICP-MS) 用于元素度分析.
- 源分配的正矩阵因子化 (PMF) 模型.
- 污染指数包括内梅罗综合污染指数 (NIPI),污染负载指数 (PLI),内梅罗综合风险指数 (NIRI) 和潜在生态风险 (PER).
主要成果:
- 与大陆地相比,观察到Cu,Pb,Zn和Cd的平均度较高.
- 在84%的采样区域中,NIPI显示严重污染,42%的PLI显示严重污染,30%的NIRI显示严重污染,16%的PER显示严重污染.
- PMF确定了的混合来源,Fe的自然来源和Cd的交通排放.
- 交通排放带来了重大的生态和健康风险,所有来源都显示了可能的癌症风险.
结论:
- 孟加拉国Tangail的道路灰尘严重受重金属污染,主要与交通排放和混合来源有关.
- 与交通相关的污染带来了重大的生态和健康风险,包括对暴露的人群可能产生的致癌效应.
- 针对交通排放的有效污染控制战略对于减轻环境退化和保护公共健康至关重要.
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