Luo Chunling, Shen Zhenguo, Lou Laiqing, Li Xiangdong
Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
Environ Pollut. 2006 Dec;144(3):862-71. doi: 10.1016/j.envpol.2006.02.012. Epub 2006 Apr 17.
The potential of 18 different plants to be used in the chemically enhanced phytoextraction of Cu, Pb, Zn and Cd was assessed using pot experiments. Chrysanthemum coronarium L. was the species most sensitive to the application of EDTA, and had the highest enhancement of Cu and Pb concentrations in its shoots. Compared with EDTA, EDDS was more effective in enhancing the concentration of Cu in the shoots of Chrysanthemum coronarium L. and Zea mays L. grown on multi-metal contaminated soils. The EDTA-treated soil still had a significant ability to enhance the concentrations of Cu and Pb in the shoots of Zea mays L. six months after the chelant treatment. However, the EDDS-treated soil did not have any effect in enhancing the concentrations of metals in the shoots of Zea mays L. in the second crop test. The results may indicate that EDDS biodegrades more rapidly than EDTA in soil and is better in limiting potential metal leaching.
通过盆栽试验评估了18种不同植物用于化学强化植物提取铜、铅、锌和镉的潜力。茼蒿是对乙二胺四乙酸（EDTA）施用最敏感的物种，其地上部铜和铅浓度的增幅最高。与EDTA相比，乙二胺二琥珀酸（EDDS）在提高生长于多金属污染土壤上的茼蒿和玉米地上部铜浓度方面更有效。螯合剂处理六个月后，经EDTA处理的土壤仍具有显著提高玉米地上部铜和铅浓度的能力。然而，在第二季作物试验中，经EDDS处理的土壤对提高玉米地上部金属浓度没有任何作用。结果可能表明，EDDS在土壤中的生物降解速度比EDTA更快，并且在限制潜在金属淋溶方面表现更好。
