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Title: Evaluation of a Carbonaceous Sorbent Prepared from Pearl Millet Husk for Its Removal of Basic Dyes
Authors: Inbaraj, B Stephen
Selvarani, K
Sulochana, N
Issue Date: Nov-2002
Publisher: NISCAIR-CSIR, India
Abstract: The capacity of a carbonaceous sorbent prepared from Pearl Millet Husk (PMHC), an agricultural byproduct to remove basic dyes was evaluated by choosing Methylene blue as the test dye. Batch-mode adsorption studies were carried out systematically, involving process parameters, such as agitation time, initial dye concentration, carbon dose, and pH. The adsorption followed a simple first order kinetic equation given by Lagergren and the rate was controlled by both film and intra-particle diffusion processes, isotherm analyses of the equilibrium data involving Freundlich, Langmuir and Redlich-Peterson models have shown that Freundlich model fits well with the experimental data more precisely, although reasonably better fit was obtained for Langmuir and Redlich-Peterson isotherm models. The adsorption parameters were obtained by non-linear optimization method and the adsorption capacity derived from Langmuir isotherm model was 82.37 mg/g. The influence of pH on dye removal was insignificant and a portion of the dye was recovered from the spent carbon in organic medium.
Page(s): 971-978
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.61(11) [November 2002]

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