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Enhanced multi-metal extraction with EDDS of deficient and excess dosages under the influence of dissolved and soil organic matter

This study investigated the influence of dissolved and soil organic matter on metal extraction from an artificially contaminated soil. With high concentration of DOM, the extraction of Cu, Zn and Pb was enhanced by forming additional metal–EDDS complexes under EDDS deficiency. However, the enhanceme... Full description

Journal Title: Environmental Pollution 01/2011, Vol.159(1), pp.78-83
Main Author: Yan, Dickson Y.S.
Other Authors: Lo, Irene M.C.
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 02697491 ; DOI: http://dx.doi.org/10.1016/j.envpol.2010.09.021
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recordid: crossref10.1016/j.envpol.2010.09.021
title: Enhanced multi-metal extraction with EDDS of deficient and excess dosages under the influence of dissolved and soil organic matter
format: Article
creator:
  • Yan, Dickson Y.S.
  • Lo, Irene M.C.
subjects:
  • Chelating Agent
  • Humic Acid
  • Fulvic Acid
  • Heavy Metal
  • Soil Remediation
ispartof: Environmental Pollution, 01/2011, Vol.159(1), pp.78-83
description: This study investigated the influence of dissolved and soil organic matter on metal extraction from an artificially contaminated soil. With high concentration of DOM, the extraction of Cu, Zn and Pb was enhanced by forming additional metal–EDDS complexes under EDDS deficiency. However, the enhancement of metal extraction under EDDS excess was probably due to the soil structure being disrupted owing to humic acid enhanced Al and Fe dissolution, which induced more metals dissolving from the soils. Fulvic acid was found to enhance metal extraction to a greater extent compared with humic acid because of its high content of the carboxylic functional group. Cu extraction from the soil with high organic matter content using EDDS was the lowest due to the high binding affinity of Cu to SOM, whereas Zn extraction became the highest because of a preference for EDDS to extract Zn due to the high stability constant of ZnEDDS. Research highlights► EDDS enhanced metal extraction was affected by a higher concentration of DOM.► The influences of DOM on metal extraction were different under deficient and excess dosages of EDDS.► Fulvic acid enhanced metal extraction to a greater extent compared with humic acid.► Cu extraction from the soil with high organic matter content was the lowest. This study focuses on the effect of dissolved and soil organic matter on EDDS enhanced metal extraction under both deficient and excess dosage conditions.
language: eng
source:
identifier: ISSN: 02697491 ; DOI: http://dx.doi.org/10.1016/j.envpol.2010.09.021
fulltext: fulltext
issn:
  • 02697491
  • 0269-7491
url: Link


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titleEnhanced multi-metal extraction with EDDS of deficient and excess dosages under the influence of dissolved and soil organic matter
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descriptionThis study investigated the influence of dissolved and soil organic matter on metal extraction from an artificially contaminated soil. With high concentration of DOM, the extraction of Cu, Zn and Pb was enhanced by forming additional metal–EDDS complexes under EDDS deficiency. However, the enhancement of metal extraction under EDDS excess was probably due to the soil structure being disrupted owing to humic acid enhanced Al and Fe dissolution, which induced more metals dissolving from the soils. Fulvic acid was found to enhance metal extraction to a greater extent compared with humic acid because of its high content of the carboxylic functional group. Cu extraction from the soil with high organic matter content using EDDS was the lowest due to the high binding affinity of Cu to SOM, whereas Zn extraction became the highest because of a preference for EDDS to extract Zn due to the high stability constant of ZnEDDS. Research highlights► EDDS enhanced metal extraction was affected by a higher concentration of DOM.► The influences of DOM on metal extraction were different under deficient and excess dosages of EDDS.► Fulvic acid enhanced metal extraction to a greater extent compared with humic acid.► Cu extraction from the soil with high organic matter content was the lowest. This study focuses on the effect of dissolved and soil organic matter on EDDS enhanced metal extraction under both deficient and excess dosage conditions.
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