Korean Journal of Chemical Engineering, Vol.31, No.9, 1577-1581, 2014
Removal of tylosin from aqueous solution by UV/nano Ag/S2O8^(2-) process : Influence of operational parameters and kinetic study
The present work deals with the photooxidative degradation of tylosin antibiotic (TYL) in the presence of potassium peroxydisulfate (K2S2O8) irradiated by UV-C in the presence of immobilized nano silver. Effects of pH, temperature, peroxydisulfate concentration and immobilized nano silver dosage on the degradation efficiency of TYL were examined. Degradation efficiency was small when the oxidation was carried out in the absence of UV irradiation. Results showed that degradation of TYL increases with temperature, nano Ag and peroxydisulfate initial concentration and decreases with pH. Due to UV/nano Ag/S2O8^(2-) processes, more than 90% of TYL can be degraded at room temperature in 35 min at an initial concentration of 50 mgl^(-1). Degradation reaction order of TYL by UV/nano Ag/S2O8^(2-) process is 1.89. Meanwhile, the initial rates of degradation in UV/nano Ag/S2O8^(2-) processes can be described well by the Langmuir-Hinshelwood kinetic model.
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