| Summary: | 碩士 === 國立臺灣大學 === 環境工程學研究所 === 90 === The oxidation of 2,4-diaminotoluene in water with ozone and combined with hydrogen peroxide and UV radiation has been studied.
By using the fractional factorial design, a kind of experiment designs, the influence of ozone dosage, pH, hydrogen peroxide concentration and UV radiation on the ozonation of 2,4-diaminotoluene was investigated.
The results show that under most conditions, 2,4-diaminotoluene could be eliminated by ozonation. However, the total organic carbon (TOC) removal is relatively low by single ozonation alone.
According to the analysis of variances (ANOVA) of experiment data, it appears that UV radiation is the most important factor in this study. That means the TOC removal is improved by UV/O3 system effectively. Ozone dosage is also an important factor. Higher ozone concentration can also enhance the TOC removal.
Except that in acidic condition, TOC removal rate is decreased, the effect of pH controlled by buffer solution is not evident. The use of H2O2 improves TOC removal but the effect is not obvious difference when the H2O2 concentration rises from 2.68×10-4M to 2.68×10-2M.
The most proper condition of ozonation of 2,4-diaminotoluene in this study is high ozone dose with low H2O2 concentration and with UV radiation in unbuffered solution.
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