Adsorption of Copper and Cadmium lons by Activated Carbon From Rice Hulls

Authors : Murat TEKER, Mustafa İMAMOĞLU

Pages : 185-192

View : 15 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The removal of copper insert ignore into journalissuearticles values(II); and cadmium insert ignore into journalissuearticles values(II); ions from aqueous solutions, by adsorption on activated carbon prepared from rice hulls insert ignore into journalissuearticles values(ACRH);, was investigated depending on pH, activated carbon dosage, contact time, initial metal concentration and solution temperature. The optimum values of pH, ACRH dosage and contact time were determined to be 5-8, 0.5 g ACRH/25 mL solution an 60 minutes respctively for the adsorption of Cu insert ignore into journalissuearticles values(II); ions and 5-8, 1.5 g ACRH/25 mL solution and 60 minutes for the adsorption of Cd insert ignore into journalissuearticles values(II); ions. From the initial concentrations, the constants for the Freundlich and Langmuir isotherm were calculated at 293 K and 313 K. The adsorption of Cu insert ignore into journalissuearticles values(II); and Cd insert ignore into journalissuearticles values(II); ions from aqueous solutions was found to be exothermic [D H°=-13.474 KJ/mol for Cu insert ignore into journalissuearticles values(II); and D H°=-2.302 KJ/mol for Cd insert ignore into journalissuearticles values(II);]. Furthermore, the other thermodynamic data for D G° and D S°, were also calculated at 293 K and 313 K.
Keywords : Adsorption, heavy metal, activated carbon, rice hulls