安徽铜陵某废弃金属矿山矿化围岩酸性水污染分析

Analysis of acid water pollution in mineralized surrounding rock of an abandoned metal mine in Tongling,Anhui Province

安徽省内矿产资源丰富,探明及开发利用的矿产地较多,在矿山生产过程中及闭坑之后,均面临着矿山酸性废水污染的问题。近年来,矿山尤其是闭坑矿山酸性废水治理逐渐由末端处理转向源头控制,因此,精准识别酸性水污染源,才能有效实现源头控制的目的。本文在对铜陵某金属矿山污染的调查中发现,该矿山矿体围岩具有硫铁矿矿化,地表水流经矿化围岩后,形成酸性水并析出重金属元素,对下游水体及土壤造成污染。

Anhui Province is rich in mineral resources,and there are many proved and exploited mineral resources.Mine acid wastewater pollution is a problem occurring in the process of mine production and after pit closure.In recent years,the treatment of acid wastewater in mines,especially in closed pit mines,has gradually changed from terminal treatment to source control.Therefore,only by accurately identifying the acid water pollution source can the purpose of source control be effectively achieved.In the investigation of pollution in a metal mine in Tongling,it was found that the surrounding rock of the ore body of the mine had pyrite mineralization.After the surface water flows through the mineralized surrounding rock,acid water formed,and heavy metal elements precipitateed,which polluted the downstream water and soil.