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https://hdl.handle.net/2440/23713
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Type: | Journal article |
Title: | Fixation of metals in soil constituents and potential remobilization by hyperaccumulating and non-hyperaccumulating plants: Results from an isotopic dilution study |
Author: | Hammer, D. Keller, C. McLaughlin, M. Hamon, R. |
Citation: | Environmental Pollution, 2006; 143(3):407-415 |
Publisher: | Elsevier Sci Ltd |
Issue Date: | 2006 |
ISSN: | 0269-7491 1873-6424 |
Statement of Responsibility: | Daniel Hammer, Catherine Keller, Michael J. McLaughlin and Rebecca E. Hamon |
Abstract: | In this study isotopic dilution methods were used to investigate the hypothesis that access to metals associated with specific chemical components in the soil that are not available to non-accumulator species could be involved in hyperaccumulation. The hyperaccumulator Thlaspi caerulescens and a non-accumulator species, Brassica napus, were grown in Cd and Zn enriched soil components calcite, goethite, charcoal and cryptomelane. The metal enriched components were aged to allow transformation of a proportion of added metals to non-labile forms. Results from the isotopic dilution L value method showed that despite taking up more metals, T. caerulescens accessed the same pool of metals as B. napus. Hence differential access to different solid-phase pools of metals appears to be an unlikely mechanism underlying metal hyperaccumulation. For all components except charcoal, L values for Cd and Zn were greater than the corresponding E values suggesting that E values may tend to underestimate the bioavailable fraction of metals in soils. Thlaspi caerulescens takes up more Cd and Zn than Brassica napus but from the same pools. |
Keywords: | E value L value Thlaspi caerulescens Brassica napus soil components |
Description: | Available online 7 February 2006. |
Rights: | Copyright © 2006 Elsevier Ltd All rights reserved. |
DOI: | 10.1016/j.envpol.2005.12.008 |
Description (link): | http://www.elsevier.com/wps/find/journaldescription.cws_home/405856/description#description |
Published version: | http://dx.doi.org/10.1016/j.envpol.2005.12.008 |
Appears in Collections: | Aurora harvest 6 Earth and Environmental Sciences publications Environment Institute publications |
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