厄立特里亚科卡矿区水质量评价及水污染特征研究

在2008年-2010年分别对厄立特里亚Zara矿区11个地下水和6个地表水(雨季采样)采样点进行抽样检测,运用世界卫生组织饮用水标准对26个水质指标进行单因子评价.结果表明,该地区水质因受地层矿物溶滤成分的影响不适合直接饮用.地下水中重金属超标严重,硫酸盐、溴酸盐和总磷也高于饮用水的最大允许水平(MPL).各指标在空间分布上差异较大,距矿区较远的监测点水质相对较好.地表水中仅总Fe和总Al含量超标,优于地下水水质,最大超标倍数分别为12.9倍和18.8倍.

Water Quality Evaluation and Water PollutionCharacteristics of Zara Koka Mine in Eritreap

In this paper,11 groundwater sampling points and 6 surface water samples(only the rainy season)were sampled from the year of 2008 to 2010 in Zara Koka Mine, Eritrea.26 water quality indexes were evaluated with single factor evaluation method of World Health Organization(WHO)drinking water standard.The results show that the water was significantly controlled by components of minerals leaching so that can not be used for drinking.The heavy metals were overexceeded in groundwater.In addition, the contents of sulfate, bromate and total phosphorus were also higher than the Maximum Permissible Level(MPL)of WHO drinking water standards.Water quality of the monitoring points were big different in the spatial distribution, which was closely related with locations of sampling points to mining areas.The quality of surface water was better than groundwater.Only total Fe and Al exceeded the standards, and the maximum exceeded multiple were 12.9 and 18.8, respectively.