Sorption kinetics of Pb2+and Cu2+ions from aqueous solution by Nipah palm ( Nypa fruticans Wurmb) shoot biomass
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Keywords

adsorption
heavy metal binding
Nipah palm

How to Cite

1.
Wankasi D, Horsfall Jnr. M, Spiff AI. Sorption kinetics of Pb2+and Cu2+ions from aqueous solution by Nipah palm ( Nypa fruticans Wurmb) shoot biomass. Electron. J. Biotechnol. [Internet]. 2006 Oct. 15 [cited 2024 Dec. 6];9(5):0-. Available from: https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/v9n5-5

Abstract

The sorption kinetics of Pb2+ and Cu2+ ions in aqueous solution by unmodified and mercaptoacetic acid modified biomass of Nypa fruticans shoot has been investigated. The equilibrium sorption capacity of Pb2+ and Cu2+ was determined from the Langmuir equation and found to be 15.59 mg/g and 21.85 mg/g for unmodified biomass and 52.86 mg/g and 66.71 mg/g for modified biomass at 30ºC. The time dependent studies showed relatively rapid sorption of 5 - 10 min to reach equilibrium for both metal ions. A batch sorption model, based on the assumption of the pseudo-second-order mechanism, was applied to predict the rate constants (g mg-1 min-1), which were found to be 3.59 x 10-4 (Pb2+) and 1.85 x 10-4 (Cu2+) and 2.82 x 10-2 (Pb2+) and 3.67 x 10-2 (Cu2+) on unmodified and mercaptoacetic acid modified biomass respectively. The activation energy of the sorption of Pb2+ and Cu2+ on Nypah palm reveals an endothermic process.

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