Original scientific paper

ADSORPTION OF ENROFLOXACINE ON NATURAL ZEOLITE - CLINOPTILOLITE

Danijela Ašperger ; Faculty of Chemical Engineering and Technology, University of Zagreb, Zagreb, Croatia
Ines Varga ; Faculty of Chemical Engineering and Technology, University of Zagreb, Zagreb, Croatia
Sandra Babić ; Faculty of Chemical Engineering and Technology, University of Zagreb, Zagreb, Croatia
Lidija Ćurković ; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia

Abstract

The potential use of Croatian natural zeolite - clinoptilolite as alternative adsorbents for removal of enrofloxacin (ENRO) as model pollutant was studied in a batch system. The influence of contact time and initial ENRO concentration on the sorption process was investigated. The percentage removal of ENRO from aqueous phase decreased with an increase in initial concentration. The experimental data were analyzed using the pseudo-second-order kinetic model. The equilibrium adsorption data were analyzed using two widely applied isotherms: Langmuir and Freundlich isotherm models. A linear method was used for comparing the best fitting of the isotherms. The little bit better fit was found to be Langmuir isotherm for adsorption of ENRO onto natural zeolite. The maximum ENRO capacity of natural zeolite from the Langmuir isotherm model at 318 K was 2.4307 mg/g.

Keywords

enrofloxacin; adsorption isotherms; kinetics of sorption; natural zeolite

Hrčak ID:

119512

URI

https://hrcak.srce.hr/119512

Publication date:

30.3.2014.

Visits: 1.496 *