不同臭氧化方式对嗅味物质IBMP去除效果研究

THE RESEARCH ON THE EFFICIENCY OF DIFFERENT OXIDIZED FORMS TO THE REMOVAL OF IBMP

研究了不同O3投加方式情况下,O3、H2O2及其联用工艺对嗅味物质2-甲氧基-3-异丁基吡嗪(IBMP)的去除效果。结果表明,在同一O3投加方式条件下,O3-H2O2联用工艺(O3间歇流法26.1%,O3连续流法100%)对IBMP的去除效果最好,其次是单独O3(O3间歇流法23.17%,O3连续流法:96.9%),单独H2O2(7.6%)效果最差。H2O2可催化O3加速产生.OH,使IBMP氧化速率加快,提高了去除率。O3投加方式对IBMP的去除效果有着较大影响,当采用间歇流法时,IBMP的去除率仅为25%左右,当采用连续流法时,IBMP的去除率接近100%,可见O3连续流法更易于去除水中的IBMP。

The effect of different oxidants （and H202） and different 03 dosing methods on the removal of Taste and Odor compound 2-isobutyl-3- methoxypyrazine （IBMP） was investigated. The results showed that the degradation efficiency of IBMP by the combination process of O3 and H202 （periodical flow of ozone： 26.1%; continuous flow of ozone： 100%） were superior to that by ozonation （periodical flow of ozone： 23.17%; continuous flow of ozone： 96.9%） or H2O2 （7.6%） only, at the same 03 dosing method. Hydrogen peroxide will accelerate the decomposition of ozone to form more hydroxyl radical. This process could speed up the oxidation of the IBMP and improve its removal efficiency. The dosing methods of the ozone had the important effect on the removal of IBMP. When using the way of periodical flow of ozone, the degradation rate oflBMP was only about 25%. When using the way of continuous flow of ozone, the degradation rate of IBMP up to 100%, so the continuous flow of ozone had the better efficiency to the removal of IBMP.