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雪中微量元素的尺寸分辨率分析来自一个露天矿开采和升级地区的雪

Fiorella Barraza¹, Andy Luu¹, Tommy Noernberg¹

¹Department of Renewable Resources, University of Alberta, Bocock Chair for Agriculture and the Environment, 348B South Academic Building, Edmonton, AB T6G 2G7, Canada. shotyk@ualberta.ca.

Environmental science. Processes & impacts

|October 21, 2025

概括

加拿大矿附近的灰尘雪中含有有毒的微量元素 (TEs),主要是较大的颗粒. 溶解的TE非常低,这表明阿塔巴斯卡河水生生物的风险有限.

科学领域:

环境科学环境科学
地质化学地质化学
环境化学环境化学

背景情况:

采矿和炼等工业活动会产生含有潜在有毒微量元素的尘埃.
转化物的生态影响取决于它们的度和化学形式,而不仅仅是存在.
了解环境矩阵中的 TE 分布对于生态风险评估至关重要.

研究的目的:

分析来自阿塔巴斯卡河的尘土雪中的选定TE的尺寸分辨率度和化学形式.
评估雪融中的TEs对水生环境构成的潜在生态风险.

主要方法:

在阿塔巴斯卡河 (Athabasca River) 沿线收集大小分辨的灰尘雪样本.
分析了保护性元素,石化元素,富元素和石化元素的度.
在颗粒,可过和真正溶解的部分中特征 TE 分布,包括与有机合物相关联.

主要成果:

试验剂主要存在于颗粒碎片 (>0.45μm) 中,随着工业的接近而增加.
在工业场所附近的可过分数 (<0.45微米) 中发现Al,Mo和V的升高.
溶解的TE度非常低,与古代冰相比,一些Ni和Y与有机合物相关.

结论:

颗粒灰尘的矿物质成分类似于当地自然和人为来源.
尽管工业靠近,但融雪中的溶 TE 度通常低于河流平均值,对水生生物构成有限的威胁.
雪中TE的物理和化学形式是确定其环境风险的关键因素.

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