DDT及其主要降解产物污染土壤的植物修复

PHYTOREMEDIATION OF DDT AND ITS MAIN DEGRADATION PRODUCT-CONTAMINATED SOIL USING GRASS

用植草方法研究了受DDT及其主要降解产物污染土壤的植物修复试验 ,比较了 1 0种草在不同污染浓度下对 5种土壤的修复能力 .研究表明 ,同一品种的草在不同土壤中对污染物的清除能力是不同的 ,不同品种的草在同一土壤中对污染物的清除能力也是不同的 .在植物修复的过程中 ,通过草对有机污染物吸收的途径而去除土壤中污染物所作的贡献很小 ,植草 3个月后 ,草对DDT及其主要降解产物的吸收与富集仅占原施药总量的 0 1 3 %—3 0 % ,而 7 1 0 %— 71

Phytoremediation of DDT and its main degradation product-contaminated soils using grasses was described in this paper.The phytoremediation abilities of 10 grass species in 5 soils types with different concentrations of DDT and its main degradation product were compared.The results indicated that the different species of grass possessed different remediation ability in same soil,and also the same species of grass possessed different remediation in different soil.It was very little that through grass to absorb DDT and its main degradation product in soil.The amount of DDT and its main degradation product taken up by grass was only from 0.13% to 0.30% of initial amount of ΣDDT in soil,and from 7.10% to 71.94% of initial amount of and its main degradation product DDT in soil disappeared after the growth of grass in 3 months.