Tetrasiklin Antibiyotiğinin Zeolitte Adsorpsiyonu

In this study, the adsorption of widely used antibiotic, oxytetracycline (OTC) onto sodium (Na+) and hexadecyltrimethylammonium (HDTMA) modified zeolite was investigated. Adsorption studies were carried out at different OTC concentrations, initial pH’s, and adsorbent dosages. The adsorption isotherm data were fitted to Freundlich model. Antibiotic adsorption on HDTMA-zeolite exhibited stronger pH dependence and 90% antibiotic removal was achieved at pH 8 and maximum OTC adsorption of Na-zeolite 88% occurred at pH 6.5. The kinetic models including pseudo-first and second order were tested to determine adsorption model for kinetics. The effect of various ions on the adsorption of OTC by Na and HDTMA-zeolite was also investigated. While the presence of calcium, magnesium, phosphate, chloride, and sulfate ions lead to decrease the sorption of OTC onto Na and HDTMA- zeolite, bicarbonate ion lead to improve the adsorption of OTC on HDTMA-zeolite. NH4+ and OTC were simultaneously removed from water by Na-zeolite. Keywords: Zeolite, Oxytetracycline, Adsorption, U.V. spectrophotometer