Sun Y Y, Xu H X, Li J H, Shi X Q, Wu J C, Ji R, Guo H Y
a Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Hydrosciences Department, Nanjing University , Nanjing , China.
b Jiangsu Maritime Safety Administrations , Nanjing , China.
Int J Phytoremediation. 2016;18(2):150-6. doi: 10.1080/15226514.2015.1073668.
To assess the phytoremediation potential of an autochthonous willow (Salix × aureo-pendula CL 'J1011') for phenanthrene (PHE)-contaminated soils and PHE-cadmium (PHE-Cd) co-contaminated soils, we conducted field experiments in the lower reaches of the Yangtze River, China. Ethylenediaminetetraacetic acid (EDTA) and ethyl lactate were tested for individual and combined effects on the phytoremediation efficiency. For PHE-contaminated soils, willow plus ethyl lactate resulted in significant removal of PHE from soils after 45 days, and the PHE concentration in the shoots was significantly higher with than without ethyl lactate. For PHE-Cd co-contaminated soils, both willow plus EDTA and willow plus EDTA and ethyl lactate led to a significant decrease in the concentrations of PHE and Cd in the soils after 45 days, whereas willow alone did not. The PHE and Cd concentrations in the willow shoots were significantly enhanced in the presence of EDTA alone and with ethyl lactate, except for the PHE concentration in stems with EDTA alone. Under the same treatment, the presence of Cd had no significant influence on the PHE removal from soils. The results indicate the feasibility of using this willow together with both EDTA and ethyl lactate for the simultaneous removal of PHE and Cd from soils.
为评估本地柳树（Salix × aureo - pendula CL 'J1011'）对菲（PHE）污染土壤及菲 - 镉（PHE - Cd）复合污染土壤的植物修复潜力，我们在中国长江下游开展了田间试验。测试了乙二胺四乙酸（EDTA）和乳酸乙酯对植物修复效率的单独及联合影响。对于PHE污染土壤，柳树加乳酸乙酯处理45天后，土壤中PHE显著去除，且添加乳酸乙酯时柳树地上部分的PHE浓度显著高于未添加时。对于PHE - Cd复合污染土壤，柳树加EDTA以及柳树加EDTA和乳酸乙酯处理45天后，土壤中PHE和Cd浓度均显著降低，而单独种植柳树则无此效果。单独添加EDTA以及添加EDTA和乳酸乙酯时，柳树地上部分的PHE和Cd浓度均显著提高，但单独添加EDTA时柳树茎中的PHE浓度除外。在相同处理下，Cd的存在对土壤中PHE的去除无显著影响。结果表明，将这种柳树与EDTA和乳酸乙酯联合使用可同时从土壤中去除PHE和Cd。
