Optimization of Chelator-Assisted Phytoextraction, Using EDTA, Lead and Sedum alfredii Hance as a Model System
2008
Liu, Dan | Islam, Ejazul | Ma, Junshan | Wang, Xin | Mahmood, Qaisar | Jin, Xiaofen | Li, Tingqiang | Yang, Xiaoe | Gupta, Dharmendra
Pot and leaching column experiments were conducted to optimize chelator-assisted phytoextraction of lead (Pb) from contaminated soils. Optimum phytoextraction occurred at added EDTA concentration of 5 mM in single dose for 10 days in low Pb soil (treated with 400 mg kg⁻¹ soil), while it would be better for high Pb soil (treated with 1,200 mg kg⁻¹ soil) with five intermittent doses of 10 mM EDTA for 7 days. Combined with column experiment, it could be inferred that chelator-assisted phytoextraction is more suitable for the slightly contaminated soils.
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