LEAVES POWDER OF SYZGIUM CUMINI AS AN ADSORBENT FOR REMOVAL OF CONGO RED DYE FROM AQUEOUS SOLUTION

In this study, batch adsorption of Congo Red (CR) dye from aqueous solution using leaves powder of sygium cumini (SC) was investigated. The effect of several operating endowmentess on adsorption namely contact time, adsorbent dose, temperature and ionic strength on the removel of dye from aqueous solution have been also investigated. The adsorption kinetics were described by using different Kinetic models such as pseudo-first-order, pseudo second, Elovich models, liquid film diffusion model, the modified Freundlich equation and the Bangham equation. The experimental data fitted very well to the pseudo-second-order kinetic model. Thermodynamic endowments namely change in Gibbs free energy (AG), change in enthalpy (AH) and change in entropy (AS) were calculated for adsorption of CR on the leaves powder of SC. It showed that adsorption of CR onto leaves powder of SC was exothermic process. This study demonstrated that leaves powder of sygium cumini (SC) are effective, environmentally friendly and low-cost biomaterial for dye removal from aqueous dye solutions and industrial effluents.