Adsorption of Chromium(VI) from Aqueous Solution using Iron Oxide Loaded Strong Base Anion Exchange Resin

Abstract

A hybrid adsorbent (FO-Tulsion) was prepared by altering Tulsion A-62(MP), a commercial strongly basic anion-exchanging resin, with hydrated ferric oxide (HFO) particles of average crystallite size 49.6 nm and the removal of Cr6+ from water on Tulsion A-62(MP) and HFO-Tulsion was observed under optimized parameters. This study examines the effectiveness of chromium(VI) removal from water utilizing Tulsion A-62(MP) and Fe-loaded Tulsion A-62(MP) as selective sorbent materials. As the resin and HFO-ion-exchange Tulsion’s mechanism was rather easy and after 210 min of Cr6+ solution interaction, the optimum equilibrium was reached. Almost all the chromium ions was removed by the sorption process when the pH was between 4.0 and 5.0. The Freundlich and Langmuir adsorption isotherms were used to compare the equilibrium data for Cr6+ adsorption and it was found that both are highly suitable for Cr6+ adsorption. Under the same conditions, evaluation of the adsorption attainment of the prepared HFO-Tulsion and the anion resin indicated that the HFO-Tulsion had an elevated adsorption capability with a value of 207.18 mg/g than the anion resin (181.55 mg/g). The resulting hybrid resin was studied using spectroscopic and solid-state methods. Adsorption is governed by first-order reversible kinetics. It is possible that modifying anion resin with hydrated ferric oxide can greatly pick up the adsorption performance in the elimination of Cr6+ from drinking water and polluted water.