Tian Dalun, Zhu Fan, Yan Wende, Fang Xi, Xiang Wenhua, Deng Xiangwen, Wang Guangjun, Peng Changhui
Section of Ecology Research, Central-South University of Forestry & Technology, Hunan 410004, China.
J Environ Sci (China). 2009;21(3):340-5. doi: 10.1016/s1001-0742(08)62274-3.
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 coefficients 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 coefficients 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.
植物修复可作为一种可持续技术用于矿山废石修复以去除重金属。本研究调查了某废弃矿场土壤和植物样本中7种重金属的污染浓度。我们发现，在废弃矿场进行植被修复后，7种重金属的降低率在4.2% - 86%范围内，其中4种重金属（锌、锰、镉、镍）的降低率超过了50%。栾树（Koelreuteria paniculata Laxm）和滇油杉（Elaeocarpus decipens）对锌、锰、镍和钴的转运系数均大于1。两种树对锰的富集系数均高于1。我们的结果表明，栾树和滇油杉在修复过程中可能充当富集植物。此外，废弃矿区的木本植被修复除了从污染土壤中去除重金属外，在改善景观方面也发挥着重要作用。
