Phytoextraction Potentials of Hyptis suaveolens and Euphorbia hirta Weeds for Cd2+ and Co2+
Keywords:Heavy metal, , contamination, soil, phytoextraction, Hyptis suaveolens
Communication in Physical Science 2020, 6(2):869-874
Authors: Hauwa, I. Muhammad* and Victoria Adedoyin
Received 22 October 2020/Accepted 27 December 2020
Cleanup of contaminated soils to get rid of heavy metals using environmental friendly methods is of great significance. Phytoremediation is a biological on-site clean up approach that makes use of plant with high metal uptake ability. In this study, Hyptis suaveolens and Euphorbia hirta were grown on soils that were contaminated by Cu2+, Cd2+, Ni2+ and Co2+ while the uncontaminated soil served as a control. The dried leaves, stems and roots of the harvested weeds were analyzed using Atomic Absorption Spectrophotometer (AAS). Both plants showed highest phytoextraction coefficients with respect to the root. Euphorbia hirta showed accumulating capacity for cadmium (i.e 37.75 µg/g) than cobalt (i.e 15.35 µg/g). Hyptis suaveolens also followed similar trend accumulating 45.85 and 23.95 (µg/g of cadmium and cobalt ions respectively.
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