Adsorption Studies of an Acid Dye From Aqueous Solution Using Lagerstroemia Indica Seed Activated Carbon as an Adsorbent
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2014, Vol 4, Issue 10
Abstract
The effectiveness of adsorption for acid dye removal from wastewaters has made it an ideal alternative to other expensive treatment options. The removal of acid Violet 4BS onto seeds of Lagerstroemia indica (LIS) from aqueous solutions was investigated using parameters such as contact time, pH, temperature, adsorbent doses, and initial dye concentration. Adsorption isotherms of dyes onto LIS were determined and correlated with common isotherm equations such as the Langmuir and Freundlich models. It was found that the Langmuir isotherm appears to fit the isotherm data better than the Freundlich isotherm. Parameters of the Langmuir and Freundlich isotherms were determined using adsorption data. The maximum removal of Acid Violet 4BS by the adsorbent was obtained at pH 2. The maximum percentage of dye removal (86.67%) was obtained at an initial dye concentration of 10mg/L with adsorbent dosage of 50 mg per 50 ml of dye solution. The adsorption kinetics of acid violet 4BS could be described by the pseudo-second order reaction model. The data obtained from adsorption isotherms at different temperatures were used to calculate several thermo-dynamic quantities such as the Gibbs energy (ΔG0), enthalpy (ΔH0), and entropy (ΔS0) of adsorption. The adsorption process was found to be spontaneous, exothermic and physical in nature. Locally available adsorbent LIS was found to have a low cost and was promising for the removal of acid violet 4BS from aqueous solutions
Authors and Affiliations
P. Satheesh kumar , K. N. Prabhakar , P. Shanthi , N. Jayakumar
Keywords
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