Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 7 Issue 4, 2005; Page No.(733-736 )

ADSORPTION KINETICS OF DIRECT VIOLET 47 (DYE) ON ACTIVATED CARBON OBTAINED FROM LOW COST AGRICULTURAL WASTE

S.F. MALEEKA 8GUM, C.UMA, S.BALAMURUGAN AND M.KALYANI

Abstract

Removal of color from wastewater is most challenging and perplexing problem, use of low-cost and affordably disposable adsorbent can bring down the cost of decolorization to a substantial extent. In the present study, Coconut shell, which is of low cost and a agro based waste in nature, and which is readily available in plenty worldwide is used as adsorbent. Batch sorption studies were performed. Isotherm studies were conducted by varying initial concentration of dye from 250 to 400 mg /L at different fixed temperatures. The amount of sorption exhibited a gradual decreasing trend with increase in pH from 2 to 12. The rate of sorption increases with increase in dose of activated coconut shell with an initial concentration of 250 mg/L. The kinetics of sorption process follows first order rate expression of Lagergren equation. The linear plots of Cf /q at different temperatures and at different initial concentrations of dye demonstrated the applicability of Langmuir model of sorption.

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