Terrestrial environment

Heavy metal accumulation by panicled goldenrain tree (Koelreuteriapaniculata) and common elaeocarpus (Elaeocarpus decipens)in abandoned mine soils in southern China


TIAN Dalun , ZHU Fan , YAN Wende , Fang Xi , XIANG Wenhua , DENG Xiangwen , WANG Guangjun , PENG Changhui

DOI:

Received June 22, 2008,Revised September 20, 2008, Accepted , Available online

Volume 21,2009,Pages 340-345

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Phytoremediation can be used as a sustainable technology for mine spoil remediation to remove heavy metals. This study investigated the concentration of 7 heavy metal contamination in soil and plant samples at an abandoned mine site. We found that, after vegetation remediation at the abandoned mine site, the reduction rates for 7 heavy metals were in the range of 4.2%–86%, where reduction rates over 50% were achieved for four heavy metals (Zn, Mn, Cd, Ni). Transfer coe cients of the panicled goldenrain tree (Koelreuteria paniculata Laxm) and the common elaeocarpus (Elaeocarpus decipens) for Zn, Mn, Ni, and Co were more than 1. Enrichment coe cients of both trees for Mn were higher than 1. Our results suggest that the panicled goldenrain tree and the common elaeocarpus tree may act as accumulators in remediation. Moreover, the woody vegetation remediation in abandoned mining areas play an important role in improving scenery besides removing heavy metal from contaminated soil.

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