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

doi:10.1016/j.jhazmat.2011.03.113

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Engineering and Science (including master's program) > Periodical Articles > Item 310902800/26977

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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, Menghau Lee, Chi-Yi Lee, Suen-Zone
Contributors:	環境工程與科學系
Keywords:	Phytoremediation Soil washing Heavy metals Compost Green remediation
Date:	2011-06
Issue Date:	2013-10-16 09:08:32 (UTC+8)
Publisher:	Elsevier
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.
Relation:	Journal of Hazardous Materials, 190(1-3), pp.125-131
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles

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