基于UV灯组合降解室内有害化学污染物的实验研究

Experimental Research of Decontaminating Indoor Harmful Chemical Pollutants on UV Lamp Combination Based

臭氧氧化和紫外辐照工艺组合联用的高级氧化技术几乎可以无选择性将有害有机化学污染物氧化成二氧化碳、水或矿物盐等无害的无机物,被广泛应用于难降解有机物的消除净化。基于185 nm和254 nm两种波长的UV灯组合进行室内有害化学污染物降解实验研究,实验表明:UV灯组合能有效降解室内低浓度甲醛(0 mg/m^3~1.000mg/m^3);254 nm UV灯协同作用下甲醛降解效果得到加强,在本实验中CADR增幅达11.95%;湿布加湿中UV灯组合协同降解CADR值可达39.2280 m^3/h。实验中臭氧氧化仍起主导作用,O_3-UV-H_2O协同高级氧化作用有限,仍需进一步优化工艺以提高净化效率,对简便实现室内有害化学污染物高效降解的高级氧化工艺研究具有指导意义。

Advanced oxidation processes that combined ozone oxidation and UV irradiation can oxidize organic chemical pollutants into harmless inorganic such as CO2, H20 or some other mineral salts without selecting, and was widely used in the elimination of refractory organic purification. This experimental research based on UV lamp combination to decontaminating indoor harmful chemical pollutants, it＇s results show that with 185nm and 254nm UV lamp combination can effectively degrade low-concentration formaldehyde （0 - 1.000 mg/m3）. With 254 nm UV lamp＇s synergistic effect, formaldehyde degradation was strengthened, and in this experiment, the CADR was increased by a value of 11.95%, the highest CADR value of the UV lamp combination synergistic effect was 39.2280 m3/h with wet cloth humidifying. Ozone oxidation still play a leading role in the experiment, and the synergistic effect of O3-UV-H2O combination was weak. Then it is necessary to optimize the process continuously to improve the purification efficiency, and it is of great significance to realize a higher efficiency advanced oxidation processes to the degradation of indoor harmful chemical pollutants.