Adsorption and Kinetic Studies of Nickel(II) Ions onto Vermiculite based Ionite

Abstract

Using vermiculite based ionite, the absorption efficiencies of Ni2+ ions from synthetic solutions were investigated. The effects of pH and initial concentration of Ni2+ ions their absorption capacity were investigated to optimize process conditions using pseudo-first and pseudo-second-order. The results obtained from the sorption of Ni2+ ions on vermiculite based ionite show the kinetic characteristics close to the pseudo-second order. The high Ni2+ ions sorption is attributed due to the the complexation of metal ions with −NH2 groups present in the absorbent, which results in the strong coordination bonds.