关键词: 双氧水, 亚硫酸铵, 臭氧, 氧化率

Abstract: Methods to enhance the oxidation of ammonium sulfite are introduced in this paper. Hydrogen peroxide as an efficient and environment friendly oxidant was used to promote ammonium sulfite oxidation. In the experiment，the bubbling oxidation reactor was used to oxidize ammonium sulfite solution through air aeration or ozone aeration，and the oxidation rate of ammonium sulfite was measured with time. Compared with oxidation through air or ozone aeration，feeding hydrogen peroxide could remarkably increase ammonium sulfite oxidation rate，for example，through air aeration，when oxidation efficiency of 0.1mol/L ammonium sulfite solution reached 60%，reaction time was reduced by 50min and for 0.5mol/L ammonium sulfite solution under the condition of ozone aeration，reaction time was reduced by 30min. However the consumption of hydrogen peroxide was also quite high，resulting in rapid depletion of hydrogen peroxide. In addition，during the ammonium sulfite oxidation process fed by hydrogen peroxide，not all of hydrogen peroxide took part in the oxidation reaction，and the amount of hydrogen peroxide effectively utilized for oxidation became larger under the condition of ozone oxidation than air oxidation. For example，through ozone aeration，the mass fraction of hydrogen peroxide was 15% larger than that through air aeration in 0.5mol/L ammonium sulfite solution. There might be some synergistic effect between ozone and hydrogen peroxide in the ammonium sulfite oxidation process.

Key words: hydrogen peroxide, ammonium sulfite, ozone, oxidation efficiency