云南某危废填埋场地下水环境状况调查与评价

Investigation and Assessment on Groundwater of a Typical Hazardous Waste Safe Landfill in Yunnan

云南属于典型的喀斯特地貌,地形地貌复杂,地下水交替循环活跃。地下水作为供水水源是重要的战略资源,了解地下水基础环境状况对地下水的保护和治理有重要意义。危险废物填埋场是地下水污染的重要来源之一。该文首次调查研究了云南省具有典型代表性的危险废物填埋场对于其周边地下水环境质量的影响,调查结果表明:安全填埋场周边地下水的F^-、NH_3-N 2个监测指标出现轻微超标情况,所有监测井的As、CN^-、NH_3-N均有检出。选用地下水综合水质指数评价了地下水环境质量状况,并结合填埋场周边环境和土壤背景值调查对污染物可能的来源进行了解析。

Yunnan belongs to the typical karst topography,the landform was complex,the circulation of groundwater was active.Groundwater as a source of water supply was an important strategic resource,understanding the basis of groundwater was of great significance to the groundwater protection and control.For the first time,the influence of hazardous waste landfill on environmental quality for groundwater was researched by taking a typical hazardous waste landfill in Yunnan for example.The results indicated that the Monitoring indicators F^- and NH_3-N were over standard slightly,and As,CN^-,NH_3-N were detected in all monitoring wells.Comprehensive water quality index was used to evaluate the groundwater conditions,and the possible contamination sources were analyzed according to the investigation of the surrounding environment and soil background values of the safe landfill.