Adsorption – Desorption of Trimethoprim Antibiotic Drug from Aqueous Solution by Two Different Natural Occurring Adsorbents

Abstract

In this study, removal of one of antibiotic drags from aqueous solution by adsorption was investigated. For this purpose, trimethoprim was used as one of antibiotic drug model. The cellulose acetate polymer and attapuligate clay were used as adsorbents. The equilibrium adsorption contact time were investigated for both cellulose acetate and attapuligate. Adsorption isotherms of trimethoprim on the two surfaces used from aqueous solution were determined. These adsorption isotherms were seen to be consistent with Freundlich adsorption isotherm. k and n constants were determined from Freundlich linear equation. The effect of initial drug concentration, temperature, pH of solution, ionic strength and desorption of the drug from the two adsorbents were studied.