Adsorption & Cation Exchange Removal of Ni (Ii) Ion from Aqueous Solution Using Modified Coir Dust

Abstract

The removal of Ni(II) ion from aqueous solution by ion exchange was studied from the coir dust of extract and residue. The extent of removal of Ni(II) was found to be dependent on contact time and it was found out that percentage of adsorption increases with contact time. The experimental data was described by pseudo 1^st and 2^nd orders and intra-particle diffusion as kinetic models while Froehlich, Langmiur and Flory-Huggines model for equilibrium. Intra-particle diffusion model has a correlation coefficient of R² = 0.956 and R² = 0.895 respectively.

Keywords: Adsorption; Cation-exchange; Coir Dust; Ni(II); Contact time.