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Journal of Fisheries and Aquatic Science
Year: 2013  |  Volume: 8  |  Issue: 1  |  Page No.: 87 - 93

Preliminary Studies on the Phytoremediation Potential of Phragmites karka (Retz.) in Asa River

U.N. Uka, H.A. Mohammed and E. Aina    

Abstract: The increase of urban and industrial activities has led to pollution and deterioration of Asa river. A study aimed at ascertaining heavy metal concentrations and allocation in Phragmites karka growing in polluted sites of Asa River with the prospect of using Phragmites karka in phytoextraction of zinc, copper, cadmium and lead was carried out. Phragmites karka was separated into (roots, stem and leaves), water and sediment samples were collected from three sampling points in Asa River were analysed using Flame atomic absorption Spectrophotometer. The results of the translocation ability were in the order Cu>Zn>Cd and Pb. The bioconcentration factor for Zn, Cu, Cd and Pb in the root, stem and leaf had low values thus, a limited transportability of heavy metals from the sediment to the plant. Heavy metal accumulation in the roots was greater than those of the shoots. The quantities of accumulation in the roots were in the order Zn>Cu>Pb>Cd. Translocation values>1 were found for Zn and Cu while Translocation values for Cd and Pb<1. It can be deduced from the result that these metals (Zn, Cu, Cd and Pb) have limited translocation to the aerial parts of plant. Cu and Zn accumulations are transported to shoots while Cd and Pb are stored in the roots. Enrichment coefficient of Zn, Cu, Pb and Cd was <1.0. This study suggests that Phragmites karka is less suitable for sequestering of these studied heavy metals.

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