Tween-40 Coated Carbonized Eucalyptus as Adsorbent for the Removal of Crystal Violet Dye from Wastewater
Abstract
In this research paper, adsorption of a well-known Crystal Violet dye was performed on to Tween-40 coated carbonized Eucalyptus wood. The coated charcoal adsorbent was characterized by using techniques of SEM-EDX and XRD. The batch studies were conducted to optimize the variables for the maximum adsorption of Crystal Violet dye and the parameters considered were initial dye concentration, adsorbent amount, time of contact, pH of the dye solution and temperature. The maximum adsorption of 94.30% was obtained for 10 ppm initial dye concentration, 1.0 g/L adsorbent, pH 9.0 and at a temperature of 40oC. The study of different adsorption kinetics was conducted within periphery of two most important models: pseudo-first order kinetics as well as pseudo-second order kinetics. It was found that the adsorption followed pseudo-second order kinetics. The experimental isotherm data was analyzed using Langmuir and Freundlich models. Both Langmuir and Freundlich isotherm models were found fit in this study, but Freundlich isotherm model gave better results than Langmuir isotherm model. Thus, this study indicates Tween-40 coated carbonized Eucalyptus wood can be utilized as an effective as well as efficient biosorbent for the eradication of crystal violet dye from wastewater solutions.
Keywords: Adsorption, Carbonized Eucalyptus, Crystal Violet, Isotherms, Tween-40.Dye removal,
