This study aimed to investigate the phytoremediation potential promoted by Baccharis dracunculifolia DC. and Baccharis trimera (Less.) DC. in copper mining tailing area, in the Southern part of Brazil. The plants were selected considering their spontaneous growth in tailing area. The phytoremediation indexes including translocation factor (TF), bioconcentration factor (BCF), metal extraction ratio (MER), and plant effective number (PEN) were assessed. Both species showed higher concentrations of heavy metals in the roots than to the shoots. B. trimera has potential for phytoextraction of Zn, Cd, Cr, and Pb and phytostabilization of Ba and Ni, whereas B. dracunculifolia demonstrated potential for phytoextraction of Pb and phytostabilization of Cu, Zn, and Ba. B. trimera showed higher potential in phytoremediation of the metals such as Cu > Zn > Cr > Ni and Cd than the B. dracunculifolia plants. A smaller number B. trimera plants was required to remove 1 g of Cu, Zn, Cr, Pb, Ni, and Cd than B. dracunculifolia plants, and implies that B. trimera is more efficient for decontamination of the metals. Both species showed potential for phytoremediation of metals in the mining tailing area under study.

本研究旨在探讨Baccharis dracunculifolia DC 促进的植物修复潜力。和Baccharis trimer (Less.) DC。在巴西南部的铜矿尾矿区。选择这些植物是考虑到它们在尾矿区的自发生长。评估植物修复指标包括易位因子（TF）、生物浓缩因子（BCF）、金属提取率（MER）和植物有效数（PEN）。这两个物种的根部重金属浓度均高于芽部。 B. trimera具有植物提取 Zn、Cd、Cr 和 Pb 以及植物稳定 Ba 和 Ni 的潜力，而B. dracunculifolia则具有植物提取 Pb 和植物稳定 Cu、Zn 和 Ba 的潜力。与龙舌兰植物相比，三叶草在对 Cu > Zn > Cr > Ni 和 Cd 等金属的植物修复方面表现出更高的潜力。与dracunculifolia植物相比，去除 1 g 铜、锌、铬、铅、镍和镉所需的三叶B. trimer植物数量较少，这意味着三叶B. trimer净化金属的效率更高。这两种物种都显示出对所研究的采矿尾矿区金属进行植物修复的潜力。