Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11016
Title: Extraction of heavy metals from e-waste contaminated soils using EDDS
Authors: Yang, R
Luo, C
Zhang, G
Li, X 
Shen, Z
Keywords: Biodegradable chelant
E-waste
EDDS
Heavy metal
Soil washing
Issue Date: 2012
Publisher: Elsevier
Source: Journal of environmental sciences, 2012, v. 24, no. 11, p. 1985-1994 How to cite?
Journal: Journal of environmental sciences 
Abstract: Environmental contamination due to uncontrolled e-waste recycling activities is drawing increasing attention in the world. Extraction of these metals with biodegradable chelant [S,S]-ethylenediaminedisuccinic acid (EDDS) and the factors influencing extraction efficacy were investigated in the present study. Results showed that the addition of EDDS at low pH (5.5) produced higher metal extraction than that at high pH (8.0) solution. Metal speciation analysis indicated that Cu was completely complexed with EDDS at different pH conditions with various amounts of EDDS applied. For Pb and Zn, at low EDDS dose of 0.304 mol/kg soil, they were present as Pb- and Zn-EDDS. However, at high EDDS dose of 1.26 mol/kg soil, most of Pb was bound with dissolved organic matter. Ca and Al were found to be strong competitors for trace metals to EDDS at low application dose and low pH condition.
URI: http://hdl.handle.net/10397/11016
ISSN: 1001-0742
EISSN: 1878-7320
DOI: 10.1016/S1001-0742(11)61036-X
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