Terrestrial environment

Accumulation of Pb, Cu, and Zn in native plants growing on contaminatedsites and their potential accumulation capacity in Heqing, Yunnan

LIU Xiaohai , GAO Yuntao , Sardar Khan , DUAN Gang , CHEN Aikui , LING Li , ZHAO Lei , LIU Zhonghan , WU Xuecan


Received October 18, 2007,Revised May 30, 2008, Accepted , Available online

Volume 20,2008,Pages 1469-1474

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Phytoremediation is one of the cost-e ective and environmental friendly technologies used to remove contaminants from contaminated soils, which has been intensively studied during the last decade. Presently, few economical and e ective remediation methods are available for the remediation of Pb contaminated sites. This study was conducted to assess the potential of 19 plants growing on contaminated sites in Pb mine area. Plants and associated soil samples were collected and analyzed for total metal concentrations. While total soil Pb, Cu and Zn concentrations varied from 1,239 to 4,311, 36 to 1,020 and 240 to 2,380 mg/kg, those in the plant shoots ranged from 6.3 to 2,029, 20 to 570, and 36 to 690 mg/kg, respectively. Among the plants, we found that one cultivated crop (Ricinus communis L.) and two native species (Tephrosia candida and Debregeasia orientalis) have a great potential for phytoremediation of Pb contaminated soils, the Pb hyperaccumulation capacity of the 3 plants was found as the order: R. communis > D. orientalis > T. candida in the investigated area.

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