Ibuprofen Adsorption Study by Langmuir, Freundlich, Temkin and Dubinin-Radushkevich Models Using Nano Zinc Oxide from Mild Hydrothermal Condition

Abstract

Ibuprofen in the aquatic area as inflammatory drug residue is dangerous for environmental sustainability. The removal of ibuprofen at the aquatic area is carried out on nano zinc oxide (NZO) as an adsorbent. The NZO adsorbent was synthesized by gelatin self-Assembly as a green method and characterized by FT-IR and XRD techniques. The residual ibuprofen model was prepared by dissolution of ibuprofen in water-hexane at ratio 10:0; 1:9; 5:5, 9:1 and 0:10. The optimized batch of experimental parameters were 100 ppm for 55 min at room temperature. Adsorption data was investigated by Langmuir, Freundlich, Temkin and Dubinin-Radushkevich models. The result shows that Temkin model is the best model for describing the adsorption mechanism between ibuprofen as adsorbate and zinc oxide as an adsorbent. The adsorption capacity of 9:1 is the highest on that ibuprofen adsorption indicated that the composition of both solvents is favorable for ibuprofen dissolution due to polar-nonpolar interaction which is reaching 92% removal of ibuprofen. In the future, zinc oxide as adsorbent may be used for the removal of ibuprofen from any aquatic core area due to the economic and environmental reason.