Thermodynamic Parameters For Adsorption of Some Disperse Dyes From Industrial Wastewater on Carbon Soot

Wastewaters of three disperse dyes obtained from a dyeing unit were subjected to color removal by adsorption technique onto carbon soot (a bi-product during partial oxidation of natural gas) as a cheap alternative for conventional carbon adsorbents. Freundlich isotherm was used to describe the adsorption of dyes from the industrial wastewater. Dubinin-Radushkevick equation was also used to evaluate the adsorption process. The processes were carried out at different temperatures between 25oC to 60oC and Van't Hoff equation was used to evaluate thermodynamic parameters (?H, ?S) for the interpretation of the adsorption process.