Removal of chromium (III) from aqueous solution by Linde Type A (LTA zeolite)

Linde Type-A (LTA) Zeolite has been prepared from sodium aluminate and sodium metasilicate by hydrothermal process precursors. Sodium metasilicate prepared from molten NaOH and SiO . The zeolite was characterized by FTIR, X-ray diffraction (XRD) analysis, XRF and SEM images. Zeolite LTA was synthesized by SiO : Al O : H O: Na O at 100 ºC at 24 hours crystallization time. Zeolite LTA was studied to obtain ion-exchange capacity for Cr (III). The results indicate that the pH, zeolite dose, ion concentration and shaking time are significant but the reaction temperature is insignificant. Maximum removal of Cr (III) closely 99% on to zeolite was achieved at shaking time 90 min, pH 5, zeolite mass 0.4 g and Cr (III) concentration 100 mg L- . Kinetics of Cr (III) removal by LTA zeolite was fitted by Pseudo- second – order model.

کلیدواژه ها:

Cr (III) ، LTA zeolite ، Removal ، Kinetic