INFLUENCE OF OPERATING CONDITIONS ON THE REMOVAL OF BRILLIANT VITAL RED DYE FROM AQUEOUS MEDIA BY BIOSORPTION USING RICE HUSK

Abstract

Biosorption is emerging as an economical and ecofriendly methodology for the removal of hazardous and toxic chemicals from waste water. The operating conditions have a great influence on the efficiency of this process. Conventional and indigenous biosorbents like baggase, wheat husk and rice husk have been evaluated for their removing efficiency of Brilliant Vital Red dye from water. Rice husk is proved better among them. The effect of important operating conditions for the removal of the dye using rice husk were studied. The observed optimum values for various factors are; 0.2 g of biosorbent, 25 ppm initial dye concentration, 30°C temperature, 15 minutes contact time, 300 rpm stirring speed and 2.0 pH. Langmuir adsorption isotherm model was also applied to evaluate maximum adsorption capacity of rice husk for Brilliant Vital Red dye. Qmax value was 15.06 which indicated that rice husk can effectively be used for the removal of Brilliant Vital Red dye from wastewater using the optimized operational conditions. This study would be accommodative with regard to practical wastewater treatment