Biosorption Of Fe3+, Pb2+, Zn2+, Cr3+ And Cd2+ From Aqueous Solution Using Immobilized Bombax Costatum Leaves.
S.A.Osemeahon, J.T. Barminas, M.A. Hamma Adama
Key words; aqueous solution, heavy metal ions, Immobilized Bombax costatum leaves, sorption capacity.
ABSTRACT: The sorption capacity of Immobilized Bombax costatum leaves (IBCL) for the removal of metal ions (Fe3+, Pb2+, Zn2+, Cr3+ and Cd2+) was studied using batch experiments. The residual metal ion concentrations were investigated using Atomic Absorption Spectrophotometer (AAS). The influence of factors such as contact time, initial concentration, ionic strength, pH and temperature were investigated. The metal ions sorption capacity by IBCL decreases with increasing ionic strength but increases with increasing pH values and initial metal ion concentration. The sorption rate for the metal ions was rapid for the first 30 minutes and equilibrium was established within 2 hrs. The maximum sorption capacity for Fe3+, Pb2+, Cd3+, Cr2+, and Zn2+ were found to be 85.56, 80.48, 76.63, 73.84 and 70.35 respectively. From the experimental work on the sorption capacity of IBCL sorbent, our result showed that the abundant but presently wasted Bombax Costatum leaves could be turned into an environmentally friendly, and cost effective sorbent for the removal of heavy metal ions from waste water.
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