Adsorption of Cr(VI) from aqueous solutions by low cost activated carbon

A.Anandan and T.Janakiram

Abstract

The efficiency of activated carbon prepared from Albizia lebbeck stem [ALSC] for the adsorption Cr(VI) ions from aqueous solution has been studied as a function of agitation time, adsorbent dosage, initial metal ion concentration, temperature and pH of adsorbate solution. The optimal conditions for the adsorption have been arrived and experiments were conducted to find out the Langmuir constants, Freundlich parameters and thermodynamic parameters such as ∆G°, ∆H° and ∆S°. Desorption studies were carried out for the recovery of both adsorbent and the metal ions.