光催化真空紫外-臭氧氧化一体的反应器研制

Development of the Photocatalytic Vacuum Ultraviolet and Ozone Oxidation Integrated Reactor

自行研制了集光催化真空紫外及臭氧氧化为一体的反应器,并采用正交实验考察其对苯酚的降解性能。结果表明,其对苯酚的矿化速率常数分别是单独真空紫外光氧化(VUV)、光催化(UV/V-N-TiO_2)的3.01和2.10倍,分别是组合真空紫外光催化(VUV/V-N-TiO_2)、真空紫外臭氧氧化(VUV/O_3)和光催化臭氧氧化(UV/V-N-TiO_2/O_3)的1.48、2.08和2.60倍,三者形成协同促进作用矿化苯酚效果好。苯酚初始质量浓度对其矿化性能影响最大,越低矿化效果越好。在初始苯酚质量浓度10 mg/L、循环体积流量0.5 L/min、p H为4、空气体积流量0.2 L/min的优化条件下,反应4 h矿化率达92.6%。一体反应器结构紧奏、工艺简单。

The integrated reactor of photocatalytic vacuum ultraviolet and ozone oxidation was self-developed,the degradation property of phenol was investigated by orthogonal experiment.The results showed that,the mineralization rate constant of phenol was 3.01 and 2.1 times of the single vacuum ultraviolet oxidation（VUV）and photocatalysis（UV/V-N-Ti O_2）,and was 1.48,2.08 and 2.60 times of the combination vacuum ultraviolet photocatalysis（VUV/V-N-Ti O_2）,vacuum ultraviolet ozone oxidation（VUV/O_3）and photocatalytic ozonation（UV/V-N-Ti O_2/O_3）respectively.The synergistic effect of the three technologies was beneficial to phenol removal.The initial mass concentration of phenol had the greatest influence on its mineralization performance,the lower mass concentration,the better mineralization effect.When the initial mass concentration of phenol,the circulating volume flow rate,p H and the volume flow rate of air was 10 mg/L,0.5 L/min,4 and 0.2 L/min respectively,the mineralization rate could reach 92.6%after 4 h reaction.The integrated reactor also had compact structure and simple technology.