Liu Xiaohai, Gao Yuntao, Khan Sardar, Duan Gang, Chen Aikui, Ling Li, Zhao Leil, Liu Zhonghan, Wu Xuecan
Yunnan Institute of Environmental Science, Kunming 650034, China.
J Environ Sci (China). 2008;20(12):1469-74. doi: 10.1016/s1001-0742(08)62551-6.
Phytoremediation is one of the cost-effective and environmental friendly technologies used to remove contaminants from contaminated soils, which has been intensively studied during the last decade. Presently, few economical and effective 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.
植物修复是用于从污染土壤中去除污染物的具有成本效益且环境友好的技术之一，在过去十年中受到了广泛研究。目前，对于铅污染场地的修复，几乎没有经济有效的修复方法。本研究旨在评估在铅矿区污染场地生长的19种植物的修复潜力。采集了植物及其相关土壤样本，并分析了总金属浓度。土壤中铅、铜和锌的总浓度分别在1239至4311mg/kg、36至1020mg/kg和240至2380mg/kg之间变化，而植物地上部分的浓度分别在6.3至2029mg/kg、20至570mg/kg和36至690mg/kg之间。在这些植物中，我们发现一种栽培作物（蓖麻）和两种本地物种（野百合和水麻）对铅污染土壤具有很大的植物修复潜力，在所研究区域，这三种植物的铅超积累能力顺序为：蓖麻>水麻>野百合。
