Optimization of chelator-assisted phytoextraction, using EDTA, lead and Sedum alfredii Hance as a model system.
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.
Liu
Dan
D
School of Tourism and Health, Zhejiang Forestry University, 311300 Lin'an, China. liudan7812@yahoo.com.cn
Islam
Ejazul
E
Ma
Junshan
J
Wang
Xin
X
Mahmood
Qaisar
Q
Jin
Xiaofen
X
Li
Tingqiang
T
Yang
Xiaoe
X
Gupta
Dharmendra
D
D002614:Chelating Agents / Q000494:pharmacology*; D004492:Edetic Acid / Q000494:pharmacology*; D052918:Environmental Restoration and Remediation; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000378:metabolism*; D008954:Models, Biological; D018520:Plant Shoots / Q000737:chemistry / Q000378:metabolism; D031963:Sedum / Q000737:chemistry* / Q000378:metabolism*; D012989:Soil Pollutants / Q000378:metabolism*
D002614:Chelating Agents; D012989:Soil Pollutants; D007854:Lead; D004492:Edetic Acid