高砷煤矿废水对表层岩溶水水质的影响

矿业开发过程对水环境的影响是严重的,而表层岩溶水是喀斯特地区居民的主要水源之一,具有典型的脆弱性. 因此,研究酸性矿山水对岩溶水质的影响尤为重要. 以兴仁县交乐高砷煤矿区为例,从水化学角度研究高砷煤矿废水对矿区周边表层岩溶水水质的影响. 结果表明:酸性矿山排水中ρ(SO_4~(2-))和溶解态金属中ρ(Cd),ρ(Cu),ρ(Zn),ρ(Mn)和ρ(Fe)高,pH低;矿山废水主要影响下游溪流地表水及其流经的岩溶管道水体的水质,对当地居民的正常使用影响较大;pH沿溪流方向逐渐升高,而水体中主要离子浓度呈不同程度的降低趋势;与酸性矿山排水没有水力联系的周边支流及泉点目前尚未受到影响.

Influence of Wastewater from a High Arsenic Coal Mine on Quality of Epikarst Water

Water environment is affected seriously by mining activities. Epikarst water, one of the important water resources in the karst areas, is typically sensitive. Therefore, it is very important to study the influence of acid mine drainage (AMD) on quality of epikarst water. A high Arsenic coal mining area in Jiaole, Xingren County, was chosen to primarily study the effects of wastewater from a high As coal mine on quality of epikarst water nearby the coal mining area from the viewpoint of hydrochemistry. It was found that the AMD is characterized by low pH with high contents of SO_4~(2-) and dissolved metals (Cd, Cu, Zn, Mn, Fe). It affects the quality of the surface water in the downriver rivulet and pipeline water in rock passing by, and has a great impact on the life of the local residents. As the water flows down through the study area, its pH increases asymptotically and the concentrations of main ions decrease to different degrees. However, the changes of water chemistries have not been found in the surrounding tributaries and springs, which have no link to the AMD.