稀土原地浸矿区地下水污染风险评价方法研究

Risk assessment of groundwater pollution in the in-situ leaching mining area of rare earth

在综合解析稀土矿区水文地质特征、原地浸矿工艺特征,以及地下水水源地的基础上,构建了地下水脆弱性、污染源和地下水价值的综合评价耦合模型,提出了针对离子型稀土原地浸矿区地下水污染风险评价的多指标评价方法,确定了系统的地下水污染风险评价指标体系.利用构建的评价方法,以我国南方某离子型稀土矿区为例,进行了地下水污染风险评价,确定了主要污染风险区域.结果表明,地下水污染风险评价分级与实际地下水水质观测的污染程度基本吻合,所建方法是合理有效的.

Based on the comprehensive analysis of hydrogeological features in rare earth mining area, in-situ leaching mining characteristic, and groundwater source, integrated muli-intdex models including groundwater intrinsic vulnerability, contaminant sources and the value of groundwater are constructed to evaluate the risk of groundwater pollution in ion-absorbed rare earth mining area and a groundwater pollution risk evaluation index system is developed. The models are applied to the assessment of groundwater pollution risk of a ion-ab- sorbed rare earth mining area in southern China as a case study.The results indicate that the classification of evaluation indexes of groundwater pollution risk fits well with the level of actual observation of groundwater pollution in this rare earth mining area, and the method is reasonable and effective.