Biology Department, Faculty of Naturals Sciences, Biosystematic Research Group, Technological University of Chocó, Quibdó, Colombia.
Chemistry Department, Universidad de Córdoba, Montería, Colombia.
Int J Phytoremediation. 2020;22(1):87-97. doi: 10.1080/15226514.2019.1644291. Epub 2019 Jul 30.
The phytoremediation capacity of Willd. ex Flüggé, was evaluated in soils from a gold mine contaminated with cadmium (Cd) and lead (Pb), using three concentration levels of each metal (15, 30, and 50 mg kg). Their ability to assimilate Cd and Pb in its different tissues was evaluated during 90 days of exposure. Plant growth behavior, accumulation of Cd and Pb, and translocation (TF) and bioaccumulation (BAF) factors were also determined. During the first 60 days of exposure, Cd had an inductive effect on the growth of ; however, after 90 days, this metal had begun to show toxic effects. Plants showed a similar pattern of accumulating Cd and Pb in their tissues with concentrations decreasing in the order roots > leaves > stem. However, the accumulated concentrations of Cd were generally higher than those of Pb with the highest metal uptakes being observed during the first 30 days of exposure. was shown to have a phytostabilization effect with regard to Cd, high concentrations of metals in tissues and little translocation, whereas it showed phytoextraction capacity for Pb. In addition, it can increase pH and organic matter in the soil rhizosphere.
采用三种浓度水平的 Cd 和 Pb（15、30 和 50mg/kg）对采自受 Cd 和 Pb 污染金矿的土壤进行了威氏海桑（Willd. ex Flüggé）的植物修复能力评估。在暴露 90 天期间，评估了其在不同组织中对 Cd 和 Pb 的同化能力。还测定了植物的生长行为、Cd 和 Pb 的积累、迁移（TF）和生物积累（BAF）因子。在暴露的前 60 天，Cd 对 的生长具有诱导作用；然而，90 天后，该金属开始表现出毒性作用。植物在其组织中积累 Cd 和 Pb 的模式相似，浓度顺序为根>叶>茎。然而，Cd 的积累浓度通常高于 Pb，在暴露的前 30 天观察到最高的金属吸收。威氏海桑对 Cd 具有植物稳定化作用，其组织中含有高浓度的金属，且迁移较少，而对 Pb 则具有植物提取能力。此外，它可以增加土壤根际的 pH 值和有机质。
