Ryegrass uptake of soil Cu and Zn induced by EDTA/EDDS together with a vertical direct-current electrical field
This paper summarizes a study on the application of vertical electric direct-current (DC) to control the migration of metal complexes in soil columns when EDTA or EDDS is used to enhance ryegrass uptake of Cu and Zn from contaminated soil. The results show that application of EDTA or EDDS significantly increased ryegrass uptake of Cu and Zn and the concentrations of Cu and Zn in all soil solutions sampled at three different levels of the soil column, i.e. 15, 30 and 50 cm. Application of vertical DC electrical field (1.0 V·cm-1) through top anode (close to the surface) and bottom cathode caused redistribution of Cu and Zn concentrations. Cooper and Zn concentrations significantly decreased in soil pore fluid that were sampled in the bottom sections of the column, suggesting an efficient control of the leaching risk of the Cu/Zn complexes when the vertical electrical field is applied. The shoot Cu concentration of ryegrass in the treatments with EDTA or EDDS and electrical field together was 46％-61％ higher than that in the treatments without electrical fields.
Vertical electrical field chelate-induced phytoremediation Cu, Zn leaching risk
Dong-Mei Zhou Hai-Fen Chen Long Cang Hai-Fen Chen Yu-Jun Wang Hai-Fen Chen
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
943-944
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）