[ Objective] The study aimed at discussing the purification effect of constructed wetland for treating river water flowing from phosphate mine areas into Fuxian Lake. [ Method] The running parameters of the constructed wetland were investigated for one year,and the purification effect of the constructed wetland for treating the sewage from phosphate mine areas was analy2ed. [ Result ] With the aid of the constructed wetland, the average removal rates of total nitrogen (TN), total phosphorus ( TP) and COD,-, were 52% ,32% and 54% , and the removal effects were beat when the designed hydraulic load was 0.67 m3/ (m · d). Running stably for six years, the constructed wetland had advantages of no power,low resistance and high removal rate. [Conclusion] "Hie constructed wetland effectively reduced the load of pollutants from phosphate mine areas into Fuxian Lake,which played important roles in the protection of water quality of Fuxian Lake.%[目的]研究抚仙湖磷矿开采区入湖河流末端温地的净化效果.[方法]对东大河河口湿地系统运行参数进行了一周年的测试,分析该湿地系统对磷矿来源污水的净化效果.[结果]湿地对TN、TP、CODCr入湖污染负荷量的平均去除率分别为52％、32％、54％,设计水力负荷为0.67 m3/(m2·d)时处理效果最好.工程已稳定运行6年,达到无能耗、防堵塞、高去除率的运行效果.[结论]该湿地有效削减了磷矿开采产生的入湖污染物负荷量,对保护抚仙湖起到关键的作用.
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