Evaluation of extractants for estimation of the phytoavailable trace metals in soils

Menzies, Neal W., Donn, Michael J. and Kopittke, Peter M. (2007) Evaluation of extractants for estimation of the phytoavailable trace metals in soils. Environmental Pollution, 145 1: 121-130. doi:10.1016/j.envpol.2006.03.021

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Author Menzies, Neal W.
Donn, Michael J.
Kopittke, Peter M.
Title Evaluation of extractants for estimation of the phytoavailable trace metals in soils
Journal name Environmental Pollution   Check publisher's open access policy
ISSN 0269-7491
Publication date 2007-08-06
Year available 2007
Sub-type Article (original research)
DOI 10.1016/j.envpol.2006.03.021
Open Access Status File (Author Post-print)
Volume 145
Issue 1
Start page 121
End page 130
Total pages 10
Place of publication Oxford
Publisher Elsevier Science
Language eng
Subject 300103 Soil Chemistry
300801 Environmental Management and Rehabilitation
050304 Soil Chemistry (excl. Carbon Sequestration Science)
050205 Environmental Management
050207 Environmental Rehabilitation (excl. Bioremediation)
C1
Abstract Despite its environmental (and financial) importance, there is no agreement in the literature as to which extractant most accurately estimates the phytoavailability of trace metals in soils. A large dataset was taken from the literature, and the effectiveness of various extractants to predict the phytoavailability of Cd, Zn, Ni, Cu, and Pb examined across a range of soil types and contamination levels. The data suggest that generally, the total soil trace metal content, and trace metal concentrations determined by complexing agents (such as the widely used DTPA and EDTA extractants) or acid extractants (such as 0.1 M HCl and the Mehlich 1 extractant) are only poorly correlated to plant phytoavailability. Whilst there is no consensus, it would appear that neutral salt extractants (such as 0.01 M CaCl2 and 0.1 M NaNO3) provide the most useful indication of metal phytoavailability across a range of metals of interest, although further research is required.
Keyword Environmental Sciences
Phytoavailability
Phytotoxicity
Bioavailability
Extractant
Trace Metals
Measurement
Plant-available Cadmium
Sludge-amended Soils
Heavy-metals
Contaminated Soils
Calcium-chloride
Copper Bioavailability
Chemical Speciation
Zinc
Toxicity
Extractability
Q-Index Code C1
Institutional Status UQ
Additional Notes This is an author version of an article originally published as Menzies, N.W., M.J. Donn, and P.M. Kopittke. 2007. Evaluation of extractants for estimation of the phytoavailable trace metals in soils. Environmental Pollution 145 (1) : 121-130. doi: 10.1016/j.envpol.2006.03.021 Copyright 2007 Elsevier. All rights reserved. Single copies only may be downloaded and printed for a user's personal research and study.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Agriculture and Food Sciences
 
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Citation counts: TR Web of Science Citation Count  Cited 212 times in Thomson Reuters Web of Science Article | Citations
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Created: Mon, 06 Aug 2007, 20:41:09 EST by Dr Peter Kopittke on behalf of School of Land, Crop and Food Sciences