ADSORPTION KINETICS AND ISOTHERM MODELS OF Cd(II), Zn(II), AND Cr(VI) BY GEORGIAN NATURAL AND MODIFIED FORMS OF MORDENITE.

Environmental pollution with heavy metals is a problem of worldwide importance due to their toxicity and potential health risks. Among the heavy metals found in industrial waters are such toxic metals as Cd(II), Zn(II), and Cr(VI). In this study, the potential of Georgian natural and modified mordenite as a low-cost, eco-friendly adsorbent for the removal of cadmium (II), zinc (II), and chromium (IV) from aqueous solutions is studied. Langmuir and Freundlich isotherms are used to model adsorption data. Studies have shown that the correlation coefficient values (R²) were best fitted by the Langmuir isotherm. The maximum adsorption capacities are 0.84mg/g, 118.92mg/g and 2.25mg/g for cadmium(II), zinc(II) and chromium(IV) respectively as described by Langmuir isotherm. [ABSTRACT FROM AUTHOR]