ADSORPTION OF PSEUDOMONAS AERUGINOSA FROM AIR BY CLINOPTILOLITE: MODELING, ISOTHERM AND KINETIC

摘要

The aim of this research was to study the Pseudomonas aeruginosa adsorption from air by clinoptilolite using response surface method (RSM). The obtained data were employed to assess the effects of clinoptilolite dose (g), air flow rate (L/min) and initial microbe concentration (CFU/mL) on the efficiency of clinoptilolite for Pseudomonas aeruginosa adsorption. The results showed that maximum adsorption efficiency was achieved at the following optimum conditions: an initial microbe concentration of 2000000 (CFU/mL), a clinoptilolite dose of 3 (g) and an airflow rate of 1.5 (L/min). Statistical checks indicated that the model was acceptable for representing the experimental data. The Langmuir, Freundlich and Dubinin-Radushkevick isotherm models were used to describe Pseudomonas aeruginosa adsorption onto clinoptilolite. In accordance with the obtained correlation coefficients, the adsorption data showed that the Freundlich model was the most suitable for modeling Pseudomonas aeruginosa adsorption onto clinoptilolite (R~2 = 0.948). The results indicated that the pseudo-second order kinetic model was the best of the kinetic models (R~2 = 0.999).