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—Heavy metals are extremely persistent in the environment and cannot degrade through chemical process, hence the long term accumulation cause induce to the environment. Soil is one of the major sink to heavy metal contamination due human activities associated to the development of global economies. Metals from waste stream, especially landfill leachate impact the soil and there is need to develop remedial option for the environmental safety of soil core. Various plants have been used to remedy polluted soil, yet metal interaction with plant differ with respect to medium or source of metal pollution. Phytoremediation technology is an alternative and cheaper approach for remediation of metal contaminated soil. Plant-based remediation is one of the most significant sustainable techniques to cope with overwhelming consequences of pollutants. Therefore this study aimed to study the potential of Cordyline sp plant and Durianta variegated for the phytoremediation of heavy metals (Pb, As, Mn, Ni, and Cr) from the leachate contaminated soil. The results showed that Cordyline sp plants tends to accumulate high amounts of this metals compared to Durianta variegated and control. Cordyline sp was able to remove 63 % of Pb, 90 % of As, 78.8 % of Mn, 88.9 % of Ni and 75 % of Cr from the metal polluted soil. The removal of heavy metal from the contaminated soil was significantly higher compared to control at P > 0.05. The highest heavy metal removal rate constant was obtained for As and Ni at same rate of 0.018 mg/kg day when Cordyline sp plants were used. Therefore we can conclude that, Cordyline sp have a potential to remediate heavy metal contaminated soil at a significant level.

Potential of Cordyline sp Plant for Remediation of Metal-Leachate Contaminated Soil