Kinetic study on degradation of tylosin in aqueous media using potassium peroxydisulfate in the presence of immobilized nanosilver

Abstract

In the present research, the degradation of tylosin (TYL) by nano Ag/S 2 O 2À 8 process under various reaction conditions was investigated. The experiments were performed in a batch reactor, using nanosilver as a catalyst. Effects of pH, persulfate concentration, temperature, and catalytic nano Ag on the degradation efficiency of TYL by persulfate are examined. For treatment of solutions containing 50 mg/L of TYL, the optimum obtained conditions were: 0.4 g/L of nano Ag, 100 mM of the KPS, initial pH of 6.0, and temperature of 40˚C. The degradation of TYL by nano Ag/S 2 O 2À 8 oxidation process has been found to follow the pseudo-first-order kinetic model. Finally rate equation for TYL degradation using Langmuir-Hinshelwood kinetic model is: r ¼ 9630:5 exp À 32:552 RT C 0:9925