招远市金矿采、选废水的利用与管理

USAGE AND MANAGEMENT OF PRODUCTIVE WASTEWATER FROM GOLD MINING AND FLOATATION IN ZHAOYUAN CITY

主要介绍招远市金矿矿坑外排废水水质、利用现状及金矿洗选废水对环境的污染问题。多年监测结果表明,招远市金矿矿坑水二次污染程度较轻,外排水水质全部符合农田灌溉和选矿用水的水质标准,部分还可作生活饮用水利用;区内金矿选矿废水中,氰化废水CN、Cu严重超标,浮选外排废水虽实现了达标排放,但总硬度、矿化度、C a2+及硫酸盐等成分含量普遍较高,对地下水仍有一定的污染作用。现场浸染试验结果反映出废水排放后在自然环境下的自然降解过程较短,对地下水影响局限于较小的范围内。

This paper mainly introduces the water quality of pit wastewater, its usage status quo, and the influence on environment. Monitoring results for years show that the secondary polluttion degree of the pit water is lighter. Local mineral processing plant generally uses the pit water in mineral processing. The wastewater has a low influence upon the farm irrigation. Some pit water can be use in drinking directly, and some must be disposed to be used as drinking water. Wastewater, the concentrations of CN and Cu in the cyanide-bearing wastewater are higher than the national standards. The wastewater of floatation reaches to the draining standard, but the contents of many components such as general rigidity, total hardness, salinity, Ca^2＋ , and sulfate are generally higher. The floatation wastewater is pollution sources for the groundwater. The result of the dip-dye test shows that the nature decline process of draining water is short： the floatation wastewater within 755 m,the cyanide wastewater within 1 000 m.