INVESTIGATION of the EFFECTS of PREPARED PVA/NANO LA2O3 MIXTURE on ALIZARIN DYE REMOVAL: KINETIC, ISOTHERM and THERMODYNAMIC STUDIES

Abstract

With the increasing industrialization, the use of dyestuffs increases. This increasing use causes serious dangers to the environment as waste. For this reason, studies on the removal of dyestuffs have increased. In this study, an adsorbent was prepared by adding nano-sized Lanthanum Oxide (La2O3) to Polyvinyl Alcohol for Alizarin Red S removal. The chemical structures of this adsorbent were confirmed by FT-IR analysis. The effects of adsorbent masses, pH, contact time on Alizarin Red S removal were investigated in adsorption studies. Accordingly, the highest 94.5% removal was achieved in 1 gram adsorbent mass, pH 7, 60 minutes. In addition, thermodynamic, isotherm and kinetic studies were carried out in the study. In isotherm studies, it was determined that the most suitable model was Freundlich and the qmax value was found to be 5.06 mg/g. However, the pseudo second order kinetic model was found to be suitable.

Keywords

• Polyvinyl Alcohol
• Lantanium Oxide
• Alizarin
• adsorption

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