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Phytoremediation of mixed-contaminated soil using the hyperaccumulator plant Alyssum lesbiacum: Evidence of histidine as a measure of phytoextractable nickel

Singer, Andrew C.; Bell, Thomas; Heywood, Chloe A.; Smith, J.A.C.; Thompson, Ian P.. 2007 Phytoremediation of mixed-contaminated soil using the hyperaccumulator plant Alyssum lesbiacum: Evidence of histidine as a measure of phytoextractable nickel. Environmental Pollution, 147 (1). 74-82. 10.1016/j.envpol.2006.08.029

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Abstract/Summary

In this study we examine the effects of polycyclic aromatic hydrocarbons (PAHs) on the ability of the hyperaccumulator plant Alyssum lesbiacum to phytoextract nickel from co-contaminated soil. Planted and unplanted mesocosms containing the contaminated soils were repeatedly amended with sorbitan trioleate, salicylic acid and histidine in various combinations to enhance the degradation of two PAHs (phenanthrene and chrysene) and increase nickel phytoextraction. Plant growth was negatively affected by PAHs; however, there was no significant effect on the phytoextraction of Ni per unit biomass of shoot. Exogenous histidine did not increase nickel phytoextraction, but the histidine-extractable fraction of soil nickel showed a high correlation with phytoextractable nickel. These results indicate that Alyssum lesbiacum might be effective in phytoextracting nickel from marginally PAH-contaminated soils. In addition, we provide evidence for the broader applicability of histidine for quantifying and predicting Ni phytoavailability in soils. Alyssum lesbiacum was shown to phytoextract nickel from PAH-contaminated soils from which the pool of nickel accessed for phytoextraction is closely modelled by a histidine-soil extract.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.envpol.2006.08.029
Programmes: CEH Programmes pre-2009 publications > Biodiversity
CEH Sections: Hails
ISSN: 0269-7491
Additional Keywords: hytoextraction, phytoremediation, bioremediation, nickel, Alyssum lesbiacum, metal hyperaccumulator, histidine, co-contaminated soil
NORA Subject Terms: Agriculture and Soil Science
Date made live: 13 Dec 2007 11:32
URI: http://nora.nerc.ac.uk/id/eprint/1606

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