Removal of Mg2+ from Aqueous Hydrogen Peroxide by Styrene Divinyl Benzene Copolymer as Ion Exchange Resin

Concentration of hydrogen peroxide from 35% to 98 wt% is performed via the methods such as vacuum distillation and cooling crystallization, but hydrogen peroxide with concentration of ≥90%, is very sensitive to impurities and may be decompose. Therefore, the solution should be quite pure before concentration process. Herein, separation of Magnesium (Mg) cation from the commercial hydrogen peroxide solution (35 wt%) by ion exchange method using strong acid cation resin Amberlite IR-120 H+ with styrene divinylbenzene copolymer matrix and sulfunic acid functional group is investigated. Effect of the amount of resin and contact time on the separation of cation is considered. The metal ion concentration in the original solution and the metal ions left unabsorbed were determined by Inductive Coupled Plasma Spectrometry technique. Experimental results obtained from the separation of Magnesium were compared with Freundlich, Langmuir and Jovanovic adsorption isothermal models. Results show that, these isotherm models only in a certain range of concentrations, are consistent with experimental results. Although, the Langmuir equation of adsorption isotherm gives the best results.