Algerian Journal of Materials Chemistry
Volume 3, Numéro 1, Pages 39-47
2020-01-07

Phytoremediation Potentials Of Some Selected Vegetables On Polluted Soils In Kano State

Authors : Gurama Hassan Mustapha . Usman Muhammad Tukur .

Abstract

Phytoremediation is the process which uses green plants for relief, transfer, stabilization or degradation of pollutants from soil, sediments, surface waters, and groundwater. The phytoremediation potential of five vegetables, Carrot (D.carota), Cabbage (B. oleracea), Tomato (Lycopersicon esculentum), Pepper (C. annum), and Lettuce (L. sativa) planted on contaminated soil samples collected from Challawa Industrial Estate Kano was investigated. The plants were grown in plastic pots and were irrigated using the collected industrial waste water. The growth parameters of the plants were monitored for twelve weeks. Thereafter, the as-grown vegetables were harvested and prepared by means of digestion using aqua regia HNO3/HCl (1:3) for Atomic Absorption Spectroscopy (AAS) analyses.The mean levels of the metals in the soil from contaminated sites were found to be in sequence of Mg > Fe > Zn> Cu >Mn; control site, Fe>Mg >Mn > Zn > Cu; plant root from contaminated site contained Zn >Mg >Fe >Mn > Cu; whereas plant root from control site had Mg >Fe > Zn >Mn > Cu; Plant shoot from contaminated site showed Zn > Fe >Mn >Mg >Cu; while plant shoot from control site contained Mg >Zn > Fe >Mn > Cu; respectively. The bio-accumulation level of the target metals onthe various parts of the experimented plants confirms their ability for the phytoextraction of different metals from the soil. The results obtained demonstrates the potential of all our experimented plants in phytoremediation of multi-metal in contaminated soils and may serve as uneconomical and innocuous candidates for phytoremediation strategy in the future for controlling metal contamination level in soil.

Keywords

Phytoremediation, Phytoextraction, Bioaccumulation factor, Vegetables, Contaminated Soils, AAS.