Removal of Procion Blue by Using Marsilea mutica Dead Biomass: Adsorption Kinetics and Equilibrium Studies

S. Jemimah1,2,* and S.R. Bheeter2

1Department of Chemistry, St. Joseph's Institute of Technology, Chennai-600 119, India

2Department of Chemistry, St. Joseph's College (Autonomous), Tiruchirappalli-620 002, India

*Corresponding author: Fax: +91 44 24503133; Tel: +91 44 24503132; E-mail: jemimahraj@gmail.com

Abstract

The adsorption of procion blue H-5R dye onto an economical, easily accessible and potential adsorbent water clover has been studied. The effects of contact time, initial pH, initial dye concentration and adsorbent dosage have been investigated. The removal of procion blue H-5R was found to increase with increase in contact time until the attainment of equilibrium. The amount of dye biosorbed per unit weight of biomass was found to decrease with increasing pH and adsorbent dosage. Pseudo first order and pseudo second order kinetic models were used to follow the adsorption process. It was found that the adsorption of procion blue H-5R onto water clover could be described by the pseudo-second order equation. The experimental isotherm data were analyzed using Langmuir and Freundlich equations, wherein adsorption of procion blue onto water clover followed the Langmuir isotherm. The water clover dead biomass before and after adsorption were characterized by FT-IR, EDAX and SEM techniques. The characterization results revealed that the porous nature of the adsorbent highly favours the adsorption of procion blue H-5R onto water clover.

Keywords

Procion blue, Reactive blue 13, Adsorption, Water clover, Biosorption.

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