| A novel strategy using biodegradable EDDS for the chemically enhanced phytoextraction of soils contaminated with heavy metals |
| |
| 作者姓名： | Chunling LUO Zhenguo SHEN Alan J.M. Baker Xiangdong LI |
| |
| 作者单位： | [1]Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong [2]College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China [3]School of Botany, The University of Melbourne, VIC 3010, Melbourne, Australia |
| |
| 摘 要： | For the sake of cost and potential environmental risk, it is necessary to minimize the amount of chelates used in chemically-enhanced phytoextraction. In the present study, a biodegradable chelating agent, EDDS was added in a hot solution at 90℃ to the soil in which garland chrysanthemum （Chrysanthemum coronarium L.） and beans （Phaseolus vulgaris L., white bean） were growing. The application of hot chelate solutions was much more efficient than the application of normal chelate solutions （25℃） in improving the uptake of heavy metals by plants. When 1 mmol kg1 of EDDS as a hot solution was applied to soil, the concentrations ofCu, Zn and Cd and the total phytoextraction by the shoots of the two plant species exceeded or approximated those in the shoots of plants treated with 5 mmol kg^-1 of normal EDTA solution. The concentrations of metals in the shoots of beans were significantly correlated with the relative electrolyte leakage rate of root cells, indicating that the root damage resulting from the hot solution might play an important role in the process of chelate-enhanced metal uptake. The soil leaching study demonstrated that decreasing the dosage of chelate resulted in decreased concentrations of soluble metals in soils. On the 28th day following the application of chelate, the concentrations of soluble metals in the EDDS treated soil were not significantly different from the concentrations in the control soil to which chelates had not been applied.
|
| 关 键 词： | 土壤污染 重金属 EDDS 生物分解 |
A novel strategy using biodegradable EDDS for the chemically enhanced phytoextraction of soils contaminated with heavy metals |
| |
| Chunling LUO Zhenguo SHEN Alan J.M. Baker Xiangdong LI.A novel strategy using biodegradable EDDS for the chemically enhanced phytoextraction of soils contaminated with heavy metals[J].Chinese Journal of Geochemistry,2006,25(B08):115-115. |
| |
| Abstract: | |
| |
| Keywords: | phytoextraction metal EDDS hot solution root damage |
| 本文献已被 维普 等数据库收录！ |
|
