红河流域红河州段微量重金属污染及其防治

通过分析选矿直排废水汇入红河水体前及汇入后下游13km处底泥、水质中的As、Pb、Cd、Cu、F及其在水中的迁移、转化、沉降，可以看出重金属被悬浮物吸附随水流迁移。沉积迁移使下游水生生物栖息地改变，水质量下降，采取物理的尾矿库沉淀或化学方法混凝、澄清后循环使用、完善排污收费等措施，对于改善下游水质及水生生态环境，恢复水质规划功能具有重要作用。

Heavy Metal Pollution and Its Control in the Segment of Honghe Prefecture of Honghe River

Based on the study of the concentrations and their transportation,transformation and settling of As,Pb,Cd,Cu in water column and the sediment in the water body before the ore-dressing wastewater converged into Honghe River and in the lower reaches(13km away from the convergence),it is found that heavy metals absorbed by suspended substance transport with water current.Sedimentation and transportation have changed the habitat for hydrobiont and degraded water quality.To adopt physical precipitation or chemical coagulation so as to reuse the wastewater and to perfect the measures for pollution charge have important impact on bettering water quality and ecological environment in the lower reaches.