The effect of EDDS addition on the phytoextraction efficiency from Pb contaminated soil by Sedum alfredii Hance.
Present study reports the results of three pot experiments, conducted to investigate the chelate-assisted phytoextraction of Pb contaminated soils. The optimum phytoextraction was observed when 2.5mM ethylene diamine disuccinic acid (EDDS) was added in single dosage for 14 days to low Pb soil (treated with 400 mg kg(-1)soil). On the contrary, for high Pb soil (treated with 1200 mg kg(-1)soil), 5mM EDDS concentration in single dosage for 10 days produced better results. Post-harvest effects of EDDS on the concentrations of available Pb and dissolved organic carbon (DOC) were significantly higher as compared with check (CK i.e. without EDDS addition), and consequently decreased with the passage of time. Our results suggested that chelate-assisted phytoextraction was more suitable for slightly contaminated soils.
Wang
Xin
X
Zhejiang Forestry University, College of Landscape Architecture, Lin'an, China.
Wang
Ying
Y
Mahmood
Qaisar
Q
Islam
Ejazul
E
Jin
Xiaofen
X
Li
Tingqiang
T
Yang
Xiaoe
X
Liu
Dan
D
D001673:Biodegradation, Environmental; D002614:Chelating Agents; D005029:Ethylenediamines; D007854:Lead / Q000302:isolation & purification / Q000378:metabolism*; D031963:Sedum / Q000378:metabolism*; D012989:Soil Pollutants / Q000302:isolation & purification / Q000378:metabolism*; D013386:Succinates
C499100:(S,S)-ethylenediaminedisuccinate; D002614:Chelating Agents; D005029:Ethylenediamines; D012989:Soil Pollutants; D013386:Succinates; D007854:Lead