ADSORPTION OF REACTIVE BLUE-4 DYE FROM AQUEOUS SOLUTION ONTOACID ACTIVATED MUSTARD STALK: EQUILIBRIUM AND KINETIC STUDIES

Anupa Ullhyan

Abstract

Present study deals with the adsorption of Reactive blue 4 (RB-4) dyes onto mustard stalk activated carbon (MSAC). Batch studies were performed to evaluate the influences of various experimental parameters like adsorbent dose, pH, contact time and initial concentration for removal of RB-4. The RB-4 removal were found to be 61.5% at optimum conditions pH 7, adsorbent dose 10g/l and equilibrium time 360 min. for 150mg/l of concentration. Adsorption of RB-4 followed pseudo-second order kinetics. Equilibrium isotherms for the adsorption of RB-4 on MSAC were analyzed by Freundlich, Langmuir, Temkin, D-R isotherm models. Out of these four models, a Langmuir isotherm was found to be best with experimental data for adsorption of RB-4 onto MSAC. The results indicate that MSAC is a good adsorbent for the removal of RB-4 from wastewater.