中文摘要：

在湖南某冶炼厂附近污染农田土壤上进行长期生态修复试验,通过连续采样研究土壤剖面不同深度渗漏水pH、水溶性有机碳（DOC）和重金属质量浓度等的变化,探讨污染土壤-芦竹-水体系中As,Cd,Pb和Zn的迁移行为。研究结果表明：与对照体系相比,芦竹修复体系下渗漏水中DOC质量浓度显著增加,As和Pb质量浓度明显降低;表层（0～25 cm）土壤剖面渗漏水中Cd和Zn质量浓度有下降趋势,但不显著;修复体系下渗漏水中As,Cd和Zn质量浓度达到地下水质量标准（GB/T 14848—93）Ⅲ类标准,而Pb质量浓度仅达到Ⅴ类标准;产后芦竹地上部年生物量约为4.5 kg/m2,对As,Cd,Pb和Zn的累积分别达0.03,0.04,0.21和0.17 g/m2;芦竹修复体系对污染土壤中As,Cd,Pb和Zn有一定的稳定和去除作用。

英文摘要：

Leaching trials for metals-contaminated soils were designed for the long-term ecoremediation field plot in the vicinity of smelting areas in Hunan Province.pH,dissolved organic carbon（DOC） and concentrations of metals,such as As,Cd,Pb and Zn in leachants from the different depth soil profiles in contaminated soil-giant reed（Arundo donax L.）-water systems,were investigated through continuous sampling.The results show that concentrations of DOC in leachants from the remediation systems are significantly increased while concentrations of As and Pb in leachants are significantly decreased compared to those from the control systems.Concentrations of Cd and Zn in topsoil layer（0-25 cm） leachants from the remediation systems,however,are slightly decreased.Concentrations of As,Cd and Zn in leachants from the remediation systems are less than the Grade Ⅲ of the Quality Standard for Groundwater（GB/T 14848—93）,while those of Pb in leachants just meet the Grade Ⅴ.The annual biomass of aerial part of giant reed is about 4.5 kg/m2 and it can accumulate 0.03,0.04,0.21,0.17 g/m2 of As,Cd,Pb and Zn,respectively.It is useful for stabilization and cleanup of As,Cd,Pb and Zn in metals-contaminated soils using giant reed.