Removal of Dye Crystal Violet From Waste Water by Low Cost Natural Adsorbent (Ccns)

Abstract

Adsorption study was conducted with dye crystal violet on natural low cost adsorbent charcoal of cashew nut shell. Adsorption of crystal violet dye was studied with the initial dye concentration at pH 6.0 at 298K, 303K, 308 K & 313 K. The adsorption study were carried out isothermally at four different temperatures. Freudlich isotherm and Langmuir isotherm were used to describe the equilibrium data and the result were discussed in details. The thermodynamic parameters such as standard free energy change, entropy change and enthalpy change were studied for charcoal of cashew nut shell. This values showed that the adsorption of crystal violet on charcoal of cashew nut shell was a spontaneous and endothermic process.