Influence of Activation Time on Ibuprofen Adsorption Using Zinc Oxide from Gelatin Templating Method

Abstract

The present work aimed to investigate the performance of activated zinc oxide for ibuprofen adsorption. The zinc oxide was synthesized by the templating method using F127 and gelatine as a soft template and sulfuric acid as a catalyst. The zinc oxide was activated by an HCl solution 1M for 1, 8, and 24 hours. The raw and activated zinc oxides were characterized by XRD and by infrared spectroscopy. The HCl treatment increases both of the numbers of Zn-O-Zn groups and peak of Zn-O from diffractogram but decreases hydroxyl group content. Ibuprofen adsorption studies of kinetics and isotherms were carried out at room temperature with solid-liquid ratio 3:5(v/v) and water-hexane solution. The adsorption properties were correlated to the activated conditions. The isotherms of adsorption were better reproduced by Langmuir-Freundlich models using activated zinc oxide by HCl at 8 hours. The best performance of ibuprofen adsorption resulted from activated zinc oxide at 8h using water-hexane 1:9 as ibuprofen solvent. The activation time and a high ratio of water-hexane both influence the adsorption of ibuprofen performance.