Effects of EDTA and low molecular weight organic acids on soil solution properties of a heavy metal polluted soil

L. H. Wu; Y. M. Luo; P. Christie; M. H. Wong

doi:10.1016/S0045-6535(02)00225-4

Effects of EDTA and low molecular weight organic acids on soil solution properties of a heavy metal polluted soil

L. H. Wu, Y. M. Luo^*, P. Christie, M. H. Wong

^*Corresponding author for this work

Department of Biology

Research output: Contribution to journal › Journal article › peer-review

188 Citations (Scopus)

Abstract

A pot experiment was conducted to study the effects of EDTA and low molecular weight organic acids (LMWOA) on the pH, total organic carbon (TOC) and heavy metals in the soil solution in the rhizosphere of Brassica juncea grown in a paddy soil contaminated with Cu, Zn, Pb and Cd. The results show that EDTA and LMWOA have no effect on the soil solution pH. EDTA addition significantly increased the TOC concentrations in the soil solution. The TOC concentrations in treatments with EDTA were significantly higher than those in treatments with LMWOA. Adding 3 mmolkg^-1 EDTA to the soil markedly increased the total concentrations of Cu, Zn, Pb and Cd in the soil solution. Compared to EDTA, LMWOA had a very small effect on the metal concentrations. Total concentrations in the soil solution followed the sequence: EDTA ≫ citric acid (CA) ≈ oxalic acid (OA) ≈ malic acid (MA) for Cu and Pb; EDTA ≫ MA ≫ CA ≈ OA for Zn; and EDTA ≫ MA ≫ CA > OA for Cd. The labile concentrations of Cu, Zn, Pb and Cd showed similar trends to the total concentrations.

Original language	English
Pages (from-to)	819-822
Number of pages	4
Journal	Chemosphere
Volume	50
Issue number	6
DOIs	https://doi.org/10.1016/S0045-6535(02)00225-4
Publication status	Published - Feb 2003

Scopus Subject Areas

Environmental Engineering
Environmental Chemistry
Chemistry(all)
Pollution
Health, Toxicology and Mutagenesis

User-Defined Keywords

EDTA
Low molecular weight organic acids
Metals
Soil solution
TOC

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10.1016/S0045-6535(02)00225-4

Cite this

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title = "Effects of EDTA and low molecular weight organic acids on soil solution properties of a heavy metal polluted soil",

abstract = "A pot experiment was conducted to study the effects of EDTA and low molecular weight organic acids (LMWOA) on the pH, total organic carbon (TOC) and heavy metals in the soil solution in the rhizosphere of Brassica juncea grown in a paddy soil contaminated with Cu, Zn, Pb and Cd. The results show that EDTA and LMWOA have no effect on the soil solution pH. EDTA addition significantly increased the TOC concentrations in the soil solution. The TOC concentrations in treatments with EDTA were significantly higher than those in treatments with LMWOA. Adding 3 mmolkg-1 EDTA to the soil markedly increased the total concentrations of Cu, Zn, Pb and Cd in the soil solution. Compared to EDTA, LMWOA had a very small effect on the metal concentrations. Total concentrations in the soil solution followed the sequence: EDTA ≫ citric acid (CA) ≈ oxalic acid (OA) ≈ malic acid (MA) for Cu and Pb; EDTA ≫ MA ≫ CA ≈ OA for Zn; and EDTA ≫ MA ≫ CA > OA for Cd. The labile concentrations of Cu, Zn, Pb and Cd showed similar trends to the total concentrations.",

keywords = "EDTA, Low molecular weight organic acids, Metals, Soil solution, TOC",

author = "Wu, {L. H.} and Luo, {Y. M.} and P. Christie and Wong, {M. H.}",

note = "Funding Information: We are grateful for grant-aided support from the Natural Science Foundation of China (nos. 49831070 and 49871042), the Major State Basic Research and Development Program of the People{\textquoteright}s Republic of China (G1999011807). We are also grateful to the Postdoctoral Science Foundation of China, the Open Laboratory of Terrestrial Ecological Processes and the Joint Open Laboratory of Soil and Environment (JOLSE), at the Institute of Soil Science, Chinese Academy of Sciences for their financial support.",

year = "2003",

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AU - Wu, L. H.

AU - Luo, Y. M.

AU - Christie, P.

AU - Wong, M. H.

N1 - Funding Information: We are grateful for grant-aided support from the Natural Science Foundation of China (nos. 49831070 and 49871042), the Major State Basic Research and Development Program of the People’s Republic of China (G1999011807). We are also grateful to the Postdoctoral Science Foundation of China, the Open Laboratory of Terrestrial Ecological Processes and the Joint Open Laboratory of Soil and Environment (JOLSE), at the Institute of Soil Science, Chinese Academy of Sciences for their financial support.

PY - 2003/2

Y1 - 2003/2

N2 - A pot experiment was conducted to study the effects of EDTA and low molecular weight organic acids (LMWOA) on the pH, total organic carbon (TOC) and heavy metals in the soil solution in the rhizosphere of Brassica juncea grown in a paddy soil contaminated with Cu, Zn, Pb and Cd. The results show that EDTA and LMWOA have no effect on the soil solution pH. EDTA addition significantly increased the TOC concentrations in the soil solution. The TOC concentrations in treatments with EDTA were significantly higher than those in treatments with LMWOA. Adding 3 mmolkg-1 EDTA to the soil markedly increased the total concentrations of Cu, Zn, Pb and Cd in the soil solution. Compared to EDTA, LMWOA had a very small effect on the metal concentrations. Total concentrations in the soil solution followed the sequence: EDTA ≫ citric acid (CA) ≈ oxalic acid (OA) ≈ malic acid (MA) for Cu and Pb; EDTA ≫ MA ≫ CA ≈ OA for Zn; and EDTA ≫ MA ≫ CA > OA for Cd. The labile concentrations of Cu, Zn, Pb and Cd showed similar trends to the total concentrations.

AB - A pot experiment was conducted to study the effects of EDTA and low molecular weight organic acids (LMWOA) on the pH, total organic carbon (TOC) and heavy metals in the soil solution in the rhizosphere of Brassica juncea grown in a paddy soil contaminated with Cu, Zn, Pb and Cd. The results show that EDTA and LMWOA have no effect on the soil solution pH. EDTA addition significantly increased the TOC concentrations in the soil solution. The TOC concentrations in treatments with EDTA were significantly higher than those in treatments with LMWOA. Adding 3 mmolkg-1 EDTA to the soil markedly increased the total concentrations of Cu, Zn, Pb and Cd in the soil solution. Compared to EDTA, LMWOA had a very small effect on the metal concentrations. Total concentrations in the soil solution followed the sequence: EDTA ≫ citric acid (CA) ≈ oxalic acid (OA) ≈ malic acid (MA) for Cu and Pb; EDTA ≫ MA ≫ CA ≈ OA for Zn; and EDTA ≫ MA ≫ CA > OA for Cd. The labile concentrations of Cu, Zn, Pb and Cd showed similar trends to the total concentrations.

KW - EDTA

KW - Low molecular weight organic acids

KW - Metals

KW - Soil solution

KW - TOC

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Effects of EDTA and low molecular weight organic acids on soil solution properties of a heavy metal polluted soil

Abstract

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