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在农村环境正义矿业社区的源分配和气候影响
Zain Alabdain Alqattan1, Alexandra Trahan1, God'sgift N Chukwuonye1
1Department of Environmental Science, College of Agriculture and Life Sciences, University of Arizona, Tucson, AZ, USA.
Environmental research
|February 16, 2025
概括
吉拉县的环境问题与 (Pb) 暴露于采矿和野火有关. 洪水动员了矿场金属,影响了家庭和户外灰尘,地质源影响了室内灰尘.
科学领域:
- 环境科学 环境科学
- 环境正义 环境正义
- 地质化学 地质化学
背景情况:
- 美国亚利桑那州吉拉县发生自然灾害后,社区对金属化物暴露和来源产生了担忧.
- 之前的研究记录了各种 (Pb) 同位素比率,需要对受影响地区的Pb来源进行全面分析.
研究的目的:
- 调查吉拉县环境样本 (沉积物,土壤,尘埃) 中的金属化物,特别是 (Pb) 的来源和同时存在情况.
- 评估自然灾害 (如洪水和野火) 对金属物质分配和环境正义的影响.
主要方法:
- 在非住宅沉积物,家庭土壤和室内/室外灰尘中分析金属合物度和Pb同位素,使用电感合等离子体质谱法.
- 来自37项研究的21个Pb同位素比率的比较,以确定Pb来源.
- 应用斯皮尔曼相关性,主要成分分析和正矩阵因数分解 (PMF) 来确定金属 (化物) 关联和来源.
主要成果:
- 在家庭和非住宅样本中发现了Pb和采矿活动之间的显著关联,以及As,Cd,Cu,Mo,Sb和Zn的同时出现.
- 室外灰尘显示出Pb来源的混合,包括采矿,野火,性油漆和垃圾填埋场,而室内灰尘主要与地质源有关.
- 沉积物和户外尘埃样本经常显示出采矿指纹,而显著的一部分户外尘埃和家庭土壤样本与野火Pb同位素签名保持一致. PMF表示洪水在从矿场重新调动金属中的作用.
结论:
- 开采活动是吉拉县Pb和相关金属化物的主要来源,影响住宅和非住宅环境.
- 野火,性油漆和垃圾填埋场也会导致室外尘埃污染,而室内尘埃受到自然地质源的影响.
- 洪水加剧了来自矿场的金属化物再分配. 这项研究为了解亚利桑那州的Pb来源,包括野火,奠定了基础.
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