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Study of lead adsorption on activated carbons


YU Kouakou
AS Ello
AJ Yapo
IM Gouli-Bi
A Trokourey

Abstract

In this study, the removal of lead (II) from water using commercial  activated carbons from wood and coconut shell were investigated in acidic medium (pH = 4). Atomic absorption spectrometer (AAS) was used to investigate initial (C0) and (equilibrium) (Ce) solution concentrations. Powder and granular activated carbons showed different adsorption capacity. The amount of Pb2+ adsorbed reached44.58, 38.96 and 39.06 mg/g for CPA, CGA 830 and CGA 1230 respectively at 25 °C. Langmuir and Freundlich adsorption models were used to represent the equilibrium data. Despite the high value of coefficient (R2) from Freundlich model, the best interpretation for the experimental data was given by the Langmuir model. The work showed that using powder activated carbon from wood exhibited relatively high adsorption capacity than activated carbon from coconut shell.

Keywords: Lead, activated carbon, adsorption, Langmuir, isotherm.

Journal Identifiers


eISSN: 1997-342X
print ISSN: 1991-8631