聚天冬氨酸强化籽粒苋修复Cd污染土壤

Enhanced phytoremediation of Cd-contaminated soil with Amaranthus Hypochondriacus L.by polyaspartic acid

以籽粒苋为修复植物,采用生物表面活性剂聚天冬氨酸(PASP)对Cd污染土壤进行了强化修复研究。考察了PASP施加量对3种Cd污染浓度土壤强化修复效果的影响。结果表明,施加PASP处理组的籽粒苋叶和根生物量、Cd浓度和Cd吸收量均有显著增加,分别是CK组的1.31~1.96倍、1.08~1.53倍和1.46~2.19倍。当土壤Cd浓度为1.0 mg/kg,施加2.0 g/kg PASP时,植物的BCF和TF达到最大,分别是CK处理组的1.43倍和1.35倍。可见PASP对Cd污染土壤具有良好的强化修复效果。

In this paper,a biosurfactant polyaspartic acid(PASP)was used to enhance the phytoremediation of Cd-contaminated soil using Amaranthus Hypochondriacus L..The effect of PASP dosage on remediation efficiency of three kinds of Cd-contaminated soil was investigated.The results showed that the biomass,Cd concentration and Cd absorption of Amaranthus Hypochondriacus L.were significantly improved after adding PASP,and were 1.31-1.96 times,1.08-1.53 times and 1.46-2.19 times of the corresponding controls,respectively.When the Cd concentration in soil was 1.0 mg/kg and 2.0 g/kg PASP was added,the BCF and TF values of the plants reached the maximum and were 1.43 and 1.35 times higher than those of the controls.Thus,PASP showed good enhanced phytoremediation performance for Cd-contaminated soil.