世界上最大的轻稀土矿的长期露天采矿活动对长途道路尘埃中的轻稀土元素产生重大影响
Xiaoxiao Han1, Zhunan Xiong1, Siyu Wang1
1Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Journal of hazardous materials
|November 3, 2024
概括
巴扬奥博矿床的长期采矿对60公里外的道路灰尘中轻稀土元素 (LREEs) 产生了重大影响. 采矿污染的土壤是道路灰尘中LREEs的主要来源,而不是采矿排放.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 采矿工程 采矿工程 采矿工程
背景情况:
- 巴扬奥博矿床是世界上最大的轻稀土元素 (LREEs) 露天矿.
- 大规模采矿活动对道路灰尘中的元素度的长期环境影响仍然基本上未经调查.
- 了解道路灰尘中LREEs的空间分布和来源对于评估采矿相关污染至关重要.
研究的目的:
- 调查露天采矿对道路灰尘中的元素度的长期影响.
- 确定采矿对轻稀土元素 (LREEs) 的影响的空间范围.
- 区分采矿排放与污染土壤对路尘LREE分布的影响.
主要方法:
- 从Bayan Obo矿山的不同距离收集散装道路灰尘 (BRD) 和再悬浮道路灰尘 (RRD).
- 收集的道路灰尘样本的基本分析.
- 统计和空间分析以确定元素的变化和来源,特别是LREEs (La,Ce,Pr,Nd).
主要成果:
- 由于采矿活动,轻稀土元素 (LREEs),特别是La,Ce,Pr和Nd,与其他元素相比,呈现出明显的统计和空间变化.
- 随着距离矿山的距离的增加,LREE度下降,在重悬浮道路灰尘 (RRD) 中观察到更高的值.
- 采矿污染的土壤,而不是直接的采矿排放,被确定为影响长期道路灰尘中LREE度的主要因素,影响面积高达60公里.
结论:
- 长期在Bayan Obo开采的露天采矿对长途道路尘埃中的LREE度产生了重大影响.
- 该研究强调了采矿污染的土壤在环境中LREEs的远程运输和积累中的关键作用.
- 一个数据驱动的框架证实了长期采矿对LREE分布的重大环境影响.
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