非法炼金废渣和污染土壤风险管控实例

从应用研究出发提出了一种矿山遗留废渣及污染土壤处置的技术和工程方案。通过前期的调查和评估,对历史遗留的非法金矿开采点的污染状况进行了定性和定量分析,确认了需对调查中发现的矿渣及周边污染土壤进行风险管控,砷管控目标值为60 mg/kg,采用“集中填埋—生态恢复—制度控制”的风险管控措施。通过以上管控措施,控制了遗留矿渣对周边农田和水体的污染风险,尤其是对饮用水水源点的污染风险。项目实施过程中积累的技术和工程经验,可为其他类似项目提供参考。

This article provides a technology and engineering solution for the disposal of mining residues and polluted soil from the perspective of applied research.Through preliminary investigation and evaluation,a qualitative and quantitative analysis was conducted on the pollution status of illegal gold mining sites left over from history.It has been confirmed that risk control measures need to be implemented for the slag and surrounding polluted soil discovered during the investigation.The target value for arsenic control is 60 mg/kg,and a risk control measure of"centralized landfill-ecological restoration-institutional control"will be adopted.Through the above control measures,the pollution risk of residual slag on surrounding farmland and water bodies has been controlled,especially the pollution risk of drinking water sources.The accumulated technical and engineering experience during the project implementation process can provide reference for other similar projects.