EVALUATION OF ADSORPTION CAPACITY OF Fe(III), Cr(VI) ON MODIFIED LATERITE MATERIALS

Abstract

   This paper focus on the adsorption of Fe(III), Cr(VI) in aqueous solution on modified laterite materials. One material was modified by Fe3+, SiO32-, PO43- solution and additional cerium (M1). The other material was modified by Fe3+, SiO32- solution with apatite ore additional cerium (M3). Some physicochemistry properties of the materials have been determined by Scanning Electron Microscopy (SEM) and BET (Brunaure-Emmet-Teller) method. The experiments were conducted using the following parameters: quilibrium time is 90 minutes for Fe(III), 120 minutes for Cr(VI); material size is 0,05÷0.2mm; adsorbent mass is 0.2g; pH is 2.5 for Fe(III), 2.0 for Cr(VI). Adsorption capacity for each metal was found as 76.92mg/g (Fe), 18.52mg/g (Cr) for M1; 39.53mg/g (Fe) and 17.85mg/g (Cr) for M3 at 250C, respectively. Adsorption capacity of Fe(III) and Cr(VI) on M1 is better than M3.