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Photocatalytic ozonation for degradation of 2-sec-butyl-4,6-dinitrophenol (DNBP) using titanium dioxide: effect of operational parameters and wastewater treatment |
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| Authors: | T Mousanejad M Khosravi S M Tabatabaii A R Khataee K Zare |
| Institution: | 1. Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran 2. Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran 3. Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran |
| Abstract: | The results of degradation efficiency of 2-sec-butyl-4,6-dinitrophenol (DNBP) in a batch system by various advanced oxidation processes revealed the order of TiO2/UV/O3 > TiO2/O3 > UV/O3 > O3 > UV/TiO2. All processes followed pseudo-first order kinetics. The influence of operational parameters such as initial pH, initial concentration of DNBP, ozone and catalyst dosage on the TiO2/UV/O3 process, which was the most significant investigated method. The ozone dosage was found to have the noticeable impact on the process; however, initial pH and TiO2 dosage were less effective. The mineralization of 40 mg/L of DNBP and petrochemical wastewater under the obtained optimal conditions was monitored by total organic carbon and chemical oxygen demand, respectively. The results demonstrated that the TiO2/UV/O3 process was a very effective method for degradation and mineralization of DNBP in aqueous solutions and industrial wastewater. The degradation intermediates were identified by GC–MS. |
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