Primena homogenih i heterogenih unapređenih oksidacionih procesa za degradaciju tekstilne antrahinonske boje

Abstract

The subject of this dissertation will be to compare the degradation efficiency of anthraquinone dye Reactive Blue 19 (RB 19) by homogeneous (H2O2/UV, Fe2+/ H2O2 and Fe2+/H2O2/UV) and heterogeneous (TiO2/UV, TiO2/UV/H2O2 and TiO2/UV/KBrO2) advanced oxidation processes. This study will determine the optimal conditions for operating parameters of mentioned processes to optimize their use and achieve maximum efficiency. The mechanism of •ОH generation in certain processes and its effects on anthraquinone dye RB 19 will be defined. With homogeneous advanced oxidation processes, the results of the influence of initial peroxide concentration showed its specific activatory or inhibitory effect, which depends on its applied concentration. Optimal initial concentration of peroxide at which a maximum efficiency of the dye removal was obtained, was in the range from 20,0 to 40,0 mmol dm-3. With heterogeneous advanced oxidation processes, the optimal concentration of TiO2 was 1,0 g dm-3, and optimal concentration of electron acceptors (H2O2 and KBrO3) was 30,0 mmol dm-3. With the increase of RB 19 dye concentration, degradation efficiency decreases with all investigated processes. Dye removal efficiency increases along with the increase of UV ligut intensity, due to increase of generated •OH radicals concentration. Presence of organic and inorganic anions, typical constituents of surface waters and wastewates, revealed that investigated anions affected removal efficiency, which depends on their concentrations and initial pH value. Separation and identification of degradation intermediates will be carried out using LC-mass spectrometry (LC/ESI/MSn), and the identification of the low-molecular mineralization products will be carried out using ion chromatography.