Titanium (IV)-Improved H 2 O 2 /O 3 Process for Acetic Acid Degradation under Acid Conditions.

The effect of Ti(IV) on the degradation efficiency of acetic acid by O3/H2O2 was investigated. The removal rate of acetic acid by O3/H2O2 increased from 8.0% to 62.9% after 30 min when Ti(IV) was added to acetic acid solution at pH 2.8. The optimized parameters were as follows: the pH of acetic acid solution less than 5.0; the mass concentration ratios of H2O2 to Ti(IV), and to acetic acid about 40:1, and 3:50, respectively. The analysis of the kinetics of acetic acid degradation using the relative method showed that Ti(IV)/H2O2/O3 produced more hydroxyl radicals than did H2O2/O3. [ABSTRACT FROM AUTHOR]