African Journal of Biotechnology
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African Journal of Biotechnology Vol. 4 (9), pp. 923-927, September 2005
Desorption of Pb2+ and Cu2+ from Nipa palm (Nypa
fruticans Wurmb) biomass Wankasi,
D1, Horsfall, M. Jnr2* and Spiff, A. I.2 1Department
of Pure and Applied Chemistry, Faculty of Science, Niger Delta University,
Wilberforce Island, P. M. B. 071, Yenagoa, Bayelsa State, Nigeria. 2Department
of Pure and Industrial Chemistry, Faculty of Science, University of Port
Harcourt, Choba Uniport P. O. Box 402, Port Harcourt, Nigeria.
*Corresponding Author’s E- mail:
horsfalljnr@yahoo.com. Accepted
28 July, 2005 |
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| Abstract | |||||
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The desorption of Pb2+ and Cu2+ from Nypa frutican Wurmb biomass originally loaded with these two metals in a batch adsorption experiment was investigated using acidic, basic and neutral desorption solutions. The metal-loaded biomass was treated with 0.1 M HCl, 0.1 M NaOH and distilled water at varying contact time. The data shows that desorption in all the reagent increased with increase in contact time, reaching 75.3 and 63.7% in acid reagent, 18.9 and 14.06% in basic reagent and 3.35 and 2.44% in distilled water for Pb2+ and Cu2+, respectively, at a contact time of 140 min. The desorption kinetic showed that the release constant, kdes, for both metal ion in acidic system was faster (6.3 x 102 and 7. 9 x 102 min-1 for Pb2+ and Cu2+) than other desorption reagents.
Key words: Desorption, adsorption, heavy metals, Nipa palm, industrial effluent. |
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