Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/2565
| Title: | A novel strategy using biodegradable EDDS for the chemically enhanced phytoextraction of soils contaminated with heavy metals | Authors: | Luo, C Shen, Z Baker, AJM Li, X |
Issue Date: | Jul-2006 | Source: | Plant and soil, July 2006, v. 285, no. 1-2, p. 67-80 | Abstract: | For the sake of cost and potential environmental risk, it is necessary to minimize the amount of chelants used in chemically enhanced phytoextraction. In the present study, a biodegradable chelating agent, EDDS was added in a hot solution at 90°C to the soil in which garland chrysanthemum (Chrysanthemum coronarium L.) and beans (Phaseolus vulgaris L., white bean) were growing. The application of hot chelant solutions was much more efficient than the application of normal chelant solutions (25°C) in improving the uptake of heavy metals by plants. When 1 mmol kg⁻¹ of EDDS as a hot solution was applied to soil, the concentrations of Cu, 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 chelant-enhanced metal uptake. The soil leaching study demonstrated that decreasing the dosage of chelant resulted in decreased concentrations of soluble metals in soils. On the 28th day following the application of chelant, the concentrations of soluble metals in the EDDS treated soil were not significantly different from the concentrations in the control soil to which chelants had not been applied. The application of biodegradable EDDS in hot solutions to soil may be an efficient alternative in chemically-enhanced phytoextraction to increase metal removal and to reduce possible leaching. | Keywords: | Phytoextraction Heavy metals EDDS EDTA Hot solution Root damage Leaching |
Publisher: | Springer | Journal: | Plant and soil | ISSN: | 0032-079X | EISSN: | 1573-5036 | DOI: | 10.1007/s11104-006-0059-3 | Rights: | © Springer Science+Business Media B.V. 2006. The original publication is available at www.springerlink.com. |
| Appears in Collections: | Journal/Magazine Article |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| B73 Plant and Soil 2006.pdf | Pre-published version | 289.77 kB | Adobe PDF | View/Open |
Access
View full-text via PolyU eLinks 
Page views
125
Last Week
0
0
Last month
Citations as of Jun 4, 2023
Downloads
217
Citations as of Jun 4, 2023
SCOPUSTM
Citations
44
Last Week
0
0
Last month
1
1
Citations as of Jun 8, 2023
WEB OF SCIENCETM
Citations
41
Last Week
0
0
Last month
0
0
Citations as of Jun 8, 2023
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.