潜流人工湿地处理矿山废水的实验研究

Experimental Study on Mine Wastewater Treatment with Subsurface Flow Constructed Wetland

以陕南某矿山废水为处理对象,利用水葱、野茭白、香蒲、李氏禾构建潜流人工湿地,研究了潜流人工湿地对矿山废水的处理效果。研究发现,所设计的潜流人工湿地运行13 d后,对Mn(Ⅱ)、COD、Cu(Ⅱ)和Zn(Ⅱ)初始浓度为229.8 mg/L、368.3 mg/L、28.6 mg/L、56.1 mg/L的矿山废水,A型潜流人工湿地末端出水口处Mn(Ⅱ)、COD、Cu(Ⅱ)和Zn(Ⅱ)的浓度依次为:3.17 mg/L、3.8 mg/L、0.47 mg/L,0.86 mg/L,B型潜流人工湿地末端出水口处Mn(Ⅱ)、COD、Cu(Ⅱ)和Zn(Ⅱ)的浓度依次为:4.25 mg/L、5.8 mg/L、0.96 mg/L和0.88 mg/L。不同的植物种植顺序对最终出水水质影响有限,但是各植物在处理过程中的贡献会因为种植顺序不同而受到极大影响。

The Subsurface Flow Constructed Wetland were builded with Scirpus validus, Zizania aquatica,Ty-pha L. and Leersia hexandra.The mine wastewater of Southern Shaanxi was treatmented by the Subsurface Flow Constructed Wetland.The research shows that the constructed wetlands have excellent treatment effect on mine wastewater containing Mn（Ⅱ）,COD,Cu（Ⅱ） and Zn（Ⅱ）.In the case of constructed wetlands to run for 13 days,Mn（Ⅱ） concentration decreased from 229.8mg/L to 3.17mg/L（Subsurface Flow Constructed Wetland A） and 4.25mg/L（Subsurface Flow Constructed Wetland B）,COD concentration decreased from 368.3mg/L to 3.8mg/L（Subsurface Flow Constructed Wetland A） and 5.8mg/L（Subsurface Flow Constructed Wetland B）,Cu（Ⅱ） concentration decreased from 28.6mg/L to 0.47mg/L（Subsurface Flow Constructed Wetland A） and 0.96mg/L（Subsurface Flow Constructed Wetland B）,Zn（Ⅱ） concentration decreased from 56.1mg/L to 0.86mg/L（Subsurface Flow Constructed Wetland A） and 0.88mg/L（Subsurface Flow Constructed Wetland B）.At the same time,the research shows that the planting order of Subsurface Flow Constructed Wetland plants has limited impact on the final effluent water quality,but has greatly affected on the contribution of wetland plants in the process.