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采用雪中的微量元素的开采矿粉尘的空间变化和化学反应性

Fiorella Barraza¹, Muhammad Babar Javed², Tommy Noernberg¹

¹Department of Renewable Resources, University of Alberta. Edmonton, AB, Canada.

|December 31, 2023

概括

在阿塔巴斯卡石砂尘埃中的微量元素反应性使用雪液进行了评估. 大多数尘埃的酸性溶解性有限,这表明生物可访问性低,环境中的移动性不同.

科学领域:

环境地质化学环境地质化学
微量元素分析微量元素分析
工业污染监测工业污染监测

背景情况:

在阿塔巴斯卡砂 (ABS) 地区的矿开采和提升产生含有各种微量元素 (TE) 的尘埃.
了解这些TEs的化学反应性和移动性对于评估环境影响至关重要.
雪是收集和分析大气尘埃沉积的有价值媒介.

研究的目的:

评估来自ABS地区的工业灰尘中TEs的化学反应性.
评估这些TE在环境中的潜在流动性和生物可访问性.
为了研究TE度和反应性的空间变性.

主要方法:

从阿塔巴斯卡河 (AR) 沿线的14个地点和3个偏远地点收集雪样.
超清洁酸浸出 (pH < 1) 的雪样,以确定TEs的酸溶性分数.
使用ICP-MS对浸出样品进行分析,使用SEM-EDS对不溶性颗粒进行检查.

主要成果:

雪中的酸溶性TE度有显著的变化,工业场所附近的V和光电素元素的丰富.
粉尘的反应性 (酸溶性/总比率) 通常低于50%,表明生物可访问性有限.
观察到的TE行为差异 (例如,Cd/Pb与Ni/V) 与矿物学和粒子类型 (例如硫化物,碳酸盐,petcoke) 有关.

结论:

在ABS粉尘中的TEs表现出不同的反应性和空间分布,受粒子特征和来源的影响.
尘埃的有限溶解性表明直接环境风险较低,但长期命运需要进一步研究.
极端的漏条件突出了反应的上限;自然水 (pH 4-8) 预计将调动较少的TE.

关键词:

气溶的反应性气溶的反应性阿塔巴斯卡 (Athabasca) 油砂是一种油砂.尘埃尘埃的尘埃,就是我们的尘埃.雪雪雪雪雪雪雪微量元素中的微量元素.

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