Combined mild soil washing and compost-assisted phytoremediation in treatment of silt loams contaminated with copper, nickel, and chromium

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Title:	Combined mild soil washing and compost-assisted phytoremediation in treatment of silt loams contaminated with copper, nickel, and chromium
Authors:	Sung, M.a , Lee, C.-Y.b, Lee, S.-Z.c
Contributors:	Department of Environmental Science and Engineering, Tunghai University
Keywords:	Compost;Green remediation;Heavy metals;Phytoremediation;Soil washing
Date:	2011
Issue Date:	2013-06-11T09:03:37Z (UTC)
Abstract:	A new soil remediation option, combining the soil washing process using pure water followed by the compost-assisted phytoextraction, is evaluated using silt loams contaminated with plating wastewater containing Cu, Ni, and Cr. Plants utilized in this study are the rapeseeds, sunflowers, tomatoes, and soapworts. Phytoextraction operation was carried out in pot experiments over a period of 4 months. Metal concentrations in roots and shoots of plants were analyzed upon completion of each pot experiment. Hypothesis testing was employed in assessing the significance of difference in the experimental data. Results indicated that the rapeseed, a hyperaccumulator, is most effective in extracting metals from the compost-amended silt loams. The fast-growing sunflowers and tomatoes are comparable to rapeseeds in accumulating metals despite their relatively low metal concentrations in tissues. Bioaccumulation coefficients obtained for all plants are less than one, indicating that phytostabilization rather than phytoextraction is the dominant mechanism at this simulated final-phase condition. ? 2011 Elsevier B.V.
Relation:	Journal of Hazardous Materials Volume 190, Issue 1-3, 15 June 2011, Pages 744-754
Appears in Collections:	[環境科學與工程學系所] 期刊論文

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