Environmental risk of tailings pond leachate pollution: Traceable strategy for leakage channel and influence range of leachate,Journal of Environmental Management

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Environmental risk of tailings pond leachate pollution: Traceable strategy for leakage channel and influence range of leachate
Journal of Environmental Management ( IF 8.0 ) Pub Date : 2023-01-21 , DOI: 10.1016/j.jenvman.2023.117341
Bowen Shi ₁ , Xixi Li ₂ , Weiwu Hu ₃ , Beidou Xi ₄ , Shengrong Liu ₅ , Di Liu ₆ , Congchao Xu ₁ , Zihao Jia ₆ , Rui Li ₁

Affiliation

State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China; State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University, St. John's, A1B 3X5, Canada.
School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Xi'an Center of Geological Survey, China Geological Survey, Xi'an, 710054, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.

Identifying the leakage channel and the influencing range is essential for controlling the environmental risks of leachate from the tailings pond. The investigation of leachate pollution in tailings pond has the defect of focusing only on the scope of tailings pond in recent studies. This study innovatively built a comprehensive investigation and accurate verification system for leachate leakage of tailings pond integrated with the aeromagnetic survey, ground penetrating radar, hydrochemistry and isotope coupling methods. Geophysical exploration found that among the four fault zones, and the F1 was the channel for leachate to recharge the groundwater 2.53 km away from the tailings pond. The fissures inside the tailings pond were connected with the natural fissures outside, forming a leachate migration channel. The hydrochemistry and isotope characteristics showed that the groundwater far away from the tailings pond were polluted by arsenic containing leachate, which verified the geophysical exploration results. The significant correlation between arsenic and SO2-4 concentration indicated that arsenic in leachate originated from the oxidation release of sulfide minerals (i.e., arsenopyrite). This study sheds light on the comprehensive investigation of leachate leakage in the tailings pond. This development method also provides guidance for environmental risk identification of other contaminated sites.

中文翻译：

尾矿库渗滤液污染环境风险：渗滤液渗漏通道及影响范围可追溯策略

识别渗漏通道及影响范围对于控制尾矿库渗滤液环境风险至关重要。近年来研究尾矿库渗滤液污染调查存在着只关注尾矿库范围的缺陷。本研究创新性地构建了集航磁、探地雷达、水化学、同位素耦合方法于一体的尾矿库渗滤液渗漏综合调查和精确验证体系。地球物理勘探发现，在4个断裂带中，F1是距尾矿库2.53公里处渗滤液补给地下水的通道。尾矿库内部的裂隙与外部的自然裂隙相连，形成渗滤液运移通道。水化学和同位素特征表明，远离尾矿库的地下水受到含砷渗滤液的污染，验证了物探结果。砷与SO2-4浓度之间的显着相关性表明，渗滤液中的砷来源于硫化物矿物（毒砂）的氧化释放。本研究为尾矿库渗滤液泄漏的综合调查提供了思路。该开发方法也为其他污染场地的环境风险识别提供了指导。

更新日期：2023-01-21

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