Dye Removal from Colored Textile Wastewater Using Tamarindus Indica Hull: Adsorption Isotherm and Kinetics Study

In this paper, the use of Tamarind hull biosorbent (Tamarindus indica) has been investigated to remove the cationic dye from textile effluent. Basic Blue 41 (BB41) was used as cationic dye model. The surface characteristics of Tamarind hull were investigated using Fourier transform infra-red and Scanning electron microscope. The influence of process variables such as adsorbent dosage, initial dye concentration and pH were studied. Data evaluated for compliance with the Langmuir, and Freundlich isotherm models. The presence of functional groups such as hydroxyl and carbonyl groups onto Tamarind hull surface were proved by FTIR analysis. The results indicate that the data for adsorption of BB41 onto Tamarind hull fitted well with Langmuir isotherm. Also, adsorption kinetics of BB41 on biosorbent was studied. The rates of sorption were found to conform to pseudo-second order kinetics with good correlation. Results indicate that Tamarind hull could be used as a biosorbent to remove the cationic dyes from contaminated watercourses. J. Color Sci. Tech. 3(2009),81-88.© Institute for Color Science and Technology.