Removal of tetraclycine by biocomposites synthesized with immobilization of Rhizopus delamar and Candida types

In this study, tetracycline adsorption using the biocomposites prepared by the immobilization of chitosan polymer and Candida yeasts (Candida lipolytica, Candida membranaefaciens, Candida tropicalis, Candida utilis) and Rhizopus delemar fungus as a microorganism on chitosan was examined. In the used parameter ranges, temperature was determined as 25-550C, pH as 2-7, concentration as 10-100 mg / L, optimum pH value as 4.0 and optimum temperature as 250C, maximum capacity chitosan-Candida utilis biocomposite 1.179 mg / g as determined. The experimental equilibrium data were adjusted to the Freundlich isotherm model of chitosan and biocomposites and the kinetic data were adjusted to the pseudo-first-order kinetics model. Enthalpy, entropy and Gibbs free energy change of adsorption processes operating according to the thermodynamic parameters were determined to be exothermic and spontaneous. Chitosan-Candida utilis biocomposite for before and after adsorption FTIR, SEM analysis and characterization studies was realized. This study proved that the new PAN-Candida utilis biocomposite might emerge as alternatives for the removal of tetracycline. © 2019 Gazi Universitesi Muhendislik-Mimarlik. All rights reserved.