Adsorptive Removal of Al, Zn, Fe, Cr and Pb from Hydrogen Peroxide Solution by IR-۱۲۰ Cation Exchange Resin

Adsorption of cations Al, Zn, Fe, Cr and Pb from aqueous solution of hydrogen peroxide using IR-۱۲۰ cation-exchange resin was studied. The removal percentage of the cations was examined by varying experimental conditions (such as pH of the hydrogen peroxide solution, temperature, contact time and dosage of adsorbent) in a stirred-batch system. Under the optimal conditions (pH=۱, T=۲۵oC, contact time=۱۵۰ min, adsorbent dosage=۵g), it was found that more than ۹۸% removal was achieved. The cations adsorption was studied on the basis of Langmuir, Freundlich and linear isotherms in the concentration range of ۰-۵۰ mg/L. Adsorption of the cations on the resin followed first-order, pseudo-first-order (Lagergren) and intraparticle diffusion kinetic models in the cations range of ۱۰-۲۰ mg/L. The best fitted model for kinetic model was obtained as Lagergren model. The obtained studies showed that IR-۱۲۰ cation-exchange resin was successfully used as an efficient adsorbent for removal of the cations from aqueous solution of hydrogen peroxide.

کلیدواژه ها:

Adsorption isotherms ، Adsorption kinetics ، IR-۱۲۰ Cation exchange resin ، Hydrogen peroxide