Chitosan and Surfactant Impregnated Chitosan Beads for Removal of Textile Dye Brilliant Black BN from Aqueous Solution

Abstract

Chitosan and CTAB (Cetyl Trimethyl Ammonium bromide) impregnated chitosan beads were prepared and used for the removal of dye Brilliant black BN from aqueous solution. Batch experiments were conducted to study the effect of CTAB concentration, contact time, agitation speed, adsorbent dosage, initial dye concentration and pH. CTAB concentration was varied from 0.01% (v/v) to 0.04% (v/v) and maximum adsorption capacity was attained at 0.02%. Adsorption was initially rapid and attained equilibrium after 5 hours. Adsorption capacity increased with increase in initial dye concentration and decreased with increase in pH. Equilibrium adsorption data were analyzed using Langmuir and Freundlich models and data agreed very well with Freundlich isotherm. Kinetic data showed better fit to pseudo second order rate model than pseudo first order rate model.