Removal of Cr(III) from Acid-Dissolution Water of Chromium Sludge by Cation Exchange Resin

Abstract

The purpose of the present study was to demonstrate the feasibility of adsorbent IRN77 resin for removal of Cr (III) from acid-dissolution water of chromium sludge. Extractions of Cr (III) from a model solution and a acid-dissolution water of chromium sludge were studied by IRN77 cation-exchange resin, respectively. The results suggested that extraction of Cr (III) with this resin followed the Lagergren first-order kinetics. The resin was high selective for Cr (III) sorption in the pH range 1-5 from a model solution containing 150 mg/L Cr (III), and a Cr (III) extraction above 99% was obtained. The studies further showed that 80% Cr (III) from a diluted acid-dissolution water containing about 150 mg/L Cr (III) could be removed which validated the process developed with model waste solution. At the same time, from the loaded resin 99% Cr (III) was eluted with 10% H2SO4. Therefore, this cation-exchange resin could be used as an efficient adsorbent material for the removal of chromium from acid-dissolution water of chromium sludge.