Assessing the heavy metal transfer and translocation by Sida acuta and Pennisetum purpureum for phytoremediation purposes

CLEMENT O. OGUNKUNLE1*, PAUL O. FATOBA1

1Department of Plant Biology, University of Ilorin, Ilorin, Nigeria; 2Bioremediation and Research Unit, Department of Environmental and Analytical Sciences, University of Wolverhampton,

United Kingdom

3Institute of Ecology and Environmental Studies, Obafemi Awolowo University, Ile-Ife, Nigeria.

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Abstract

Field sampling of two prevalent weeds (Sida acuta and Pennisetum purpureum) growing on cement-polluted soil was
carried out seasonally to assess the root and leaf contents of Pb, Cu, Cr, Cd and Zn. Concentrations of heavy metal in
corresponding soils (total and bioavailable) were also determined and data generated were used to calculate the
respective transfer factors (TFs) and translocation indices (Tis) of metals in the weed species. The results of the TFs
and Tis were used to evaluate the potential ability of these weed species to accumulate heavy metals in their tissues and
suitability or phytoremediation. Findings indicated that S. acuta and P. purpureum are suitable for phytostabilization of
Cr, Cd and Zn in cement-polluted soil while Cr and Cd can be phytoextracted by these two weed species from cement- polluted soil.
Keywords: Accumulator plant, phytoremediation, weeds species, phytoextractor, transfer factor,
translocation index.

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