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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 7, No. 1, 2010, pp. 147-156
Bioline Code: st10016
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 7, No. 1, 2010, pp. 147-156

 en Removal of chromium (VI) from aqueous solutions using Lewatit FO36 nano ion exchange resin
Rafati, L.; Mahvi, A. H.; Asgari, A.R. & Hosseini, S. S.

Abstract

The removal of the chromium (VI) ion from aqueous solutions with the Lewatit FO36 ion-exchange resin is described at different conditions. The effects of adsorbent dose, initial metal concentration, contact time and pH on the removal of chromium (VI) were investigated. The batch ion exchange process was relatively fast and it reached equilibrium after about 90 min of contact. The ion exchange process, which is pH dependent showed maximum removal of chromium (VI) in the pH range 5.0-8.0 for an initial chromium (VI) concentration of 0.5 mg/dm3. The equilibrium related to Lewatit FO36 ion- exchange capacity and the amounts of the ion exchange were obtained using the plots of the Langmuir adsorption isotherm. It was observed that the maximum ion exchange capacity of 0.29 mmol of chromium (VI)/g for Lewatit FO36 was achieved at optimum pH value of 6.0. The ion exchange of chromium (VI) on this cationexchange resin followed first-order reversible kinetics.

Keywords
Adsorption isotherm; Chromium (VI); Ion exchange kinetics; Lewatit FO36; Nano resin

 
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