Cr(VI) Removal from Aqueous Solutions by Using Weak Base Epoxy Anion-Exchange Resin as Adsorbent
In this study, 701 weak base epoxy anion-exchange resin was used as a low-cost adsorbent to remove Cr(V) from the light polluted water. To optimize its usage, the influences of pH, contact time, resin dosage and coexisting ions were investigated. Adsorption process was found to be highly pH dependent. The optimum pH range for adsorption of Cr(VI) was found to be between 6 and 8. The necessary time to reach adsorption equilibrium is about 20min. Langmuir and Freundlich adsorption isotherms were applicable to the adsorption process and their constants were evaluated. It was found that the Langmuir model yields a much better fit to the data compared with that of the Freundlich model.
Reza Iranpour, Ji Zhao, Aijie Wang, Fenglin Yang and Xinyong Li
H. M. Ma et al., "Cr(VI) Removal from Aqueous Solutions by Using Weak Base Epoxy Anion-Exchange Resin as Adsorbent", Advanced Materials Research, Vols. 518-523, pp. 2451-2455, 2012