| Summary: | 碩士 === 明志科技大學 === 環境與安全衛生工程系環境工程碩士班 === 105 === In this study, "purify indoor air quality simulation test box" was designed in the laboratory, test cabinets installed in the UVC lamps (254nm) and Ozone generators and water mist generators, using its Hydroxyl radicals (•OH) of toluene degradation by "O3/UV/H2O" synergistic effects, using different concentrations and fixed low airflow velocity. For the number of different UV lamps, different ozone concentration, Synergies of UV lamps and different ozone concentrations, full open equipment with improve the relative humidity, a series of experiments were conducted to investigate the advanced oxidation technologies of the removal performance of purification.
When the intake air flow rate is for test cabinets is too fast, the reaction residence time is too short, which will seriously affect the purification effect of UVC lamp and ozone and synergistic promoting mechanism on the treatment effects of toluene degradation, and thus affect the degradation rate α (%) formula accuracy.
At a certain flow velocity (≦0.8m/s), full open equipment of "O3/UV/H2O" synergistic promoting effects. For treatment the different initial concentration of toluene contamination (5 ppm, 15 ppm, 30ppm, 60 ppm). The test cabinets began to gradually degradation the stability curve at relative humidity (80%). The moisture content will be the core of mechanism that influences the synergistic promoting effects of purification outcomes, in addition to the influence of the flow rate on the reaction time.
The non-selectivity purifying effect of the OH reaction pollutant is greater than the selective purification effect of the ozone reaction pollutant, and the oxidizing potential and reduction potential, the hydroxyl radical 2.8V is greater than the ozone 2.07V, so OH is the main force for degradation toluene.
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