Abstract:
Objectives: The adsorption of indigo dye onto methylmethacrylate/sodium-Y-Zeolite composite and amidoximated acrylonitrile / Na-Y-Zeolite composte has been evaluated in watery solutions studying some different parameters namely, contact period, measure of the acidity or alkalinity of a solution, adsorbent dosage and thermal factor was also examined.
Methods: Two sorption isotherm imitations namely, Langimuir and Frendlich sorption imitations had been utilized for descriping equilibria isotherm. Evaluation of the activating forces of sorption were carried out regarding sorption of indigo dye on both composites. Kinetics of the sorption model were studied and two kinetic imitations were utilized in an attempt for descriping the kinetics of the process with regard to the practically obtained information.
Key findings: Regarding both composites, the psodo-second order kinetics imitation was suitable and is consistent with the practically obtained information. The activating force (Ea), difference in liberated energies (∆G), entalpy (∆H) and enthropy (∆S) of sorption methodology had been determined regarding the sorption of the indigo dye via both composites. The termodynamics of the sorption proved that the process regarding both composites had been both spontaneously and endothermically happening.
Conclusion: The practically obtained information indicated that both of methylmethacrylate/sodium-Y-Zeolite composite and amidoximated polyacrylonitrile/sodium-Y-Zeolite composite might serve well as inexpensive, efficient and reproducible adsorbants to get rid of indigo dyes from wastewaters.