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https://hdl.handle.net/2440/68372
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Type: | Journal article |
Title: | Transfer functions for solid-solution partitioning of cadmium for Australian soils |
Author: | De Vries, W. McLaughlin, M. Groenenberg, J. |
Citation: | Environmental Pollution, 2011; 159(12):3583-3594 |
Publisher: | Elsevier Sci Ltd |
Issue Date: | 2011 |
ISSN: | 0269-7491 1873-6424 |
Statement of Responsibility: | W. de Vries, M.J. McLaughlin, J.E. Groenenberg |
Abstract: | To assess transport and ecotoxicological risks of metals, such as cadmium (Cd) in soils, models are needed for partitioning and speciation. We derived regression-based "partition-relations" based on adsorption and desorption experiments for main Australian soil types. First, batch adsorption experiments were carried out over a realistic range of dissolved Cd concentrations in agricultural soils in Australia. Results showed linear sorption relationships, implying the adequacy of using Kd values to describe partitioning. Desorption measurements were then carried out to assess in-situ Kd values and relate these to soil properties The best transfer functions for solid-solution partitioning were found for Kd values relating total dissolved Cd concentration to total soil Cd concentrations, accounting for the variation in pH, SOM contents and DOC concentrations. Model predictions compared well with measurements of an independent data set, but there was a tendency to underestimate dissolved Cd concentrations of highly polluted soils. |
Keywords: | Cadmium Transfer function Adsorption Partitioning Pollution |
Rights: | Copyright © 2011 Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.envpol.2011.08.006 |
Published version: | http://dx.doi.org/10.1016/j.envpol.2011.08.006 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 5 Environment Institute publications |
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