REMOVAL OF Cr(VI) FROM AQUEOUS SOLUTION BY HAZELNUT HUSK CARBON

Abstract

In this study, Cr(VI) adsorption ability of hazelnut husk carbon (HHC) was examined by investigating various parameters such as initial pH of the solution, agitation time and initial concentration using batch mode adsorption. The carbon was prepared by the treatment of hazelnut husk with sulfuric acid for 24 h at ambient temperature. The HHC showed high affinity towards to Cr(VI) ions at pH of 1.0. The equilibration time was found to be 16 h. Cr(VI) adsorption equilibrium was analyzed by Langmuir and Freundlich isotherm equations. The adsorption of Cr(VI) on the HHC was well described with Langmuir model with maximum adsorption capacity of 344.83 mg g(-1). Also, the adsorption kinetics of Cr(VI) was followed by pseudo second order kinetic model. At the end, single stage batch adsorber was designed using the adsorption data.