Dynamic and Equilibrium Studies on Adsorption of Direct Dye (Direct Yellow 28) by Low Cost Activated Carbon Derived from Jatropha curcas Stem Waste
J. Environ. Nanotechnol., Volume 4, No 3 (2015) pp. 74-81
Abstract
Activated carbon materials were prepared from abundantly available Jatropha Curcas stem waste. The carbon samples were prepared by subjecting the carbon material to various chemical processes. The adsorption capacity of selected derived carbon sample using Jatropha Curcas stem waste prepared by Dolomite process(CaCO3) was much greater than the capacities of the other carbons prepared by various processes. The adsorption of Direct Dye (Direct Yellow 28) on this dolomite treated activated carbon was investigated to assess the possible use of this adsorbent for the processing of Textile dyeing Effluent wastewater. The effect of major Variables governing the efficiency of process such as initial dye concentration, agitation time and temperature on the adsorption capacity has been studied. The percentage removal of dye is observed to decrease with the increase in initial dye concentration. With increase in temperature, the adsorption of dye also decreases, indicating exothermic nature of the reaction. Adsorption isothermal data could be interpreted by the Langmuir and Freundlich equations. Kinetic data have been studied using Elovich, Pseudo-first order and Pseudo-second order equations for understanding the reaction mechanism. The result have established good potentiality for the Activated Carbons material to be used for the adsorption of Direct Yellow 28 from wastewater
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