Removal of congo red dye onto coconut (cocos nucifera) shell and bael (aegle marmelos) extracts using taguchi approach

Abstract

In the present paper adsorption technique was employed for removal of Congo-Red dye. Congo-Red dye is a carcinogenic dye which comes in the effluents of textile industries during dyeing and rinsing processes. The adsorption of Congo red from solution was carried out using low cost adsorbents like coconut (Cocos nucifera) shell extract and bael (Aegle marmelos) fruit extract with different contact times, temperatures, and pHs. .2 gm of adsorbent was taken in the dye solution for the adsorption process. The Taguchi experimental design method was applied for the systematic and effective investigation to determine the optimal conditions of the operation variables. In case of coconut it was observed that pH is the main factor for determining the rate of adsorption while in case of bael extract it was found to be time and bael showed characteristics of being an endothermic adsorbent.