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- Title
Oksitetrasiklin hidroklorürün doğal zeolit ile sulu çözeltilerden giderimi.
- Authors
Başkan, Gülşah; Açıkel, Ünsal; Levent, Menderes
- Abstract
The toxicity of antibiotic residues in water resources adversely affects the environment. Recent studies have focused on the removal of organic pollutants such as antibiotics from aqueous solutions with cheap and environmentally compatible adsorbents. In this study, adsorption of oxytetracycline hydrochloride (OTCHCL) on the natural Manisa-Gördes clinoptilolite was investigated in the batch system at 298-323 K. Effects of pH, initial concentration, adsorbent dosage, contact time, stirring speed and temperature on adsorption were examined and optimum parameters were determined. Isotherm models including Langmuir, Freundlich, Dubinin-Radushkevich (D-R), Temkin were applied to analyze the adsorption data. Kinetic constants were determined by pseudo-first order (PFO), pseudo-second order (PSO), intraparticle diffusion and Elovich models. Adsorption of OTC-HCL on natural zeolite fitted well to the Freundlich and pseudo-second order models. The maximum adsorption capacity of natural zeolite was determined as 60.97 mg/g at 323 K. Thermodynamic studies indicated that the adsorption of OTC-HCL on natural zeolite was spontaneous and endothermic. Physicochemical characterization of natural zeolite was conducted by N2 adsorptiondesorption, XRD, FTIR, SEM-EDX analyses before and after adsorption. SBET, specific surface area of the natural zeolite decreased after adsorption process. Characterization results showed that OTC-HCL molecules were successfully adsorbed on the natural zeolite surface.
- Subjects
ADSORPTION capacity; CLINOPTILOLITE; X-ray diffraction; ZEOLITES; PH effect; ANTIBIOTIC residues; DIFFUSION
- Publication
Journal of the Faculty of Engineering & Architecture of Gazi University / Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi,, 2023, Vol 38, Issue 3, p1505
- ISSN
1300-1884
- Publication type
Article
- DOI
10.17341/gazimmfd.1008501