He Dong, Qiu Bo, Peng Jin-hui, Peng Liang, Hu Ling-xue, Hu Yao
College of Horticulture and Landscape, Hunan Agricultural University, Changsha 410128, China.
Huan Jing Ke Xue. 2013 Sep;34(9):3595-600.
The key of phytoremediation was researches and selecting of dominant species in the lead-zinc tailings. This assay analyzed the amount of heavy metals, and the enrichment and transporting features of heavy metals, such as Pb, Zn, Cu, Cd and Mn, in the dominant species in the district, and then we can select the pioneer plants for ecosystem restoration of the area. Results showed that there were 40 species of higher plants, which belonged to 40 chasses and 22 families in the area. And we selected 15 dominant species by heavy metals. Among these dominant species, the content of Pb in Ficus tikoua was 4. 01 times higher than that in other plants, the transfer factor (TF) was 3.91, and bioaccumulation factor (BCF) was 14.4. The capability of TF and BCF of Ficus zikoua was high, so Ficus tikoua had potentials in phytoremediation of heavy metals in polluted area and its enrichment capability of Pb was worth for the further research. Apart from Ficus zikoua, other 14 kinds of dominant plants had a better tolerance in metal pollution in tailings, and they can be used as pioneer plants of ecological rehabilitation in lead-zinc tailings in Xiashuiwan.
植物修复的关键在于对铅锌尾矿优势物种的研究与筛选。本试验分析了该区域优势物种中重金属的含量以及铅、锌、铜、镉和锰等重金属的富集与转运特征，进而可为该区域生态系统恢复筛选先锋植物。结果表明，该区域有高等植物40种，隶属于22科40属。通过重金属含量筛选出15种优势物种。在这些优势物种中，地果榕的铅含量比其他植物高4.01倍，转移系数（TF）为3.91，生物富集系数（BCF）为14.4。地果榕的TF和BCF能力较高，因此地果榕在污染区重金属植物修复方面具有潜力，其对铅的富集能力值得进一步研究。除地果榕外，其他14种优势植物对尾矿中的金属污染具有较好的耐受性，可作为下沙湾铅锌尾矿生态修复的先锋植物。
