Department of Soil Science and Land Management, Federal University of Agriculture, Abeokuta, Nigeria.
Department of Environmental Management and Toxicology, Federal University of Agriculture, Abeokuta, Nigeria.
Int J Phytoremediation. 2020;22(8):872-884. doi: 10.1080/15226514.2020.1717433. Epub 2020 Jan 29.
Heavy metals sorption behavior and phytoremediative potentials of 14 indigenous tropical plants were evaluated with EDTA and Urea as amendments. Order of preferential sorption of metals are: Pb > Cu > Zn > Cd. In competitive sorption, Pb sorption was increased by 4.98, Cu by 4.24, Zn by 1.40, and Cd by -6 units, implying potential Cd pollution. Order of plants' dry matter accumulation was: > > > > > > and preferentially translocate Cu and Zn, while and translocated Zn, Cu, and Pb. , and preferentially translocated Cu, Pb, Cd, and Zn. The plants are preferentially enriched in Cu and Zn, Pb was selected by , and . Urea and EDTA enhanced the metal uptake in the plants by 130% and 145%, respectively. Tolerance index (TI) of the plants were reduced by the amendments except in , , and . and could not tolerate the metals.
采用 EDTA 和尿素作为改良剂，评估了 14 种本土热带植物对重金属的吸附行为和植物修复潜力。金属优先吸附顺序为：Pb>Cu>Zn>Cd。在竞争吸附中，Pb 的吸附量增加了 4.98，Cu 增加了 4.24，Zn 增加了 1.40，Cd 减少了 6 个单位，这意味着可能存在 Cd 污染。植物干物质积累的顺序为：> > > > > > > > 优先转运 Cu 和 Zn，而 和 转运 Zn、Cu 和 Pb。 、 和 优先转运 Cu、Pb、Cd 和 Zn。这些植物优先富集 Cu 和 Zn，Pb 被 、 和 选择。尿素和 EDTA 分别使植物对金属的吸收增加了 130%和 145%。除了 、 、 和 外，这些改良剂降低了植物的耐受力指数（TI）。 、 和 不能耐受这些金属。
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