School of Resources and Environmental Science, Hubei University, Wuhan, China; Hubei Key Laboratory of Regional Development and Environmental Response, Hubei University, Wuhan, China.
Institute of Environmental Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan, ROC.
Chemosphere. 2018 Oct;208:808-817. doi: 10.1016/j.chemosphere.2018.06.035. Epub 2018 Jun 5.
Chinese cooking fume is one of the sources of volatile organic compounds (VOCs) in the air. An innovative control technology combining photocatalytic degradation and ozone oxidation (UV/TiO+O) was developed to decompose VOCs in the cooking fume. Fiberglass filter (FGF) coated with TiO was prepared by an impregnation procedure. A continuous-flow reaction system was self-designed by combining photocatalysis with advanced ozone oxidation technique. By passing the simulated cooking fume through the FGF, the VOC decomposition efficiency in the cooking fume could be increased by about 10%. The decomposition efficiency of VOCs in the cooking fume increased and then decreased with the inlet VOC concentration. A maximum VOC decomposition efficiency of 64% was obtained at 100 ppm. Similar trend was observed for reaction temperature with the VOC decomposition efficiencies ranging from 64 to 68%. Moreover, inlet ozone concentration had a positive effect on the decomposition of VOCs in the cooking fume for inlet ozone≤1000 ppm and leveled off for inlet ozone>1000 ppm. 34% of VOC decomposition efficiency was achieved solely by ozone oxidation with or without near-UV irradiation. A maximum of 75% and 94% VOC decomposition efficiency could be achieved by O+UV/TiO and UV/TiO+O techniques, respectively. The maximum decomposition efficiencies of VOCs decreased to 79% for using UV/TiO+O technique with adding water in the oil fume. Comparing the chromatographical species of VOCs in the oil fume before and after the decomposition of VOCs by using UV/TiO+Otechnique, we found that both TVOC and VOC species in the oil fume were effectively decomposed.
中式烹饪油烟是空气中挥发性有机化合物（VOCs）的来源之一。开发了一种将光催化降解和臭氧氧化相结合的创新控制技术（UV/TiO+O）来分解烹饪油烟中的 VOCs。采用浸渍法制备了涂覆 TiO 的玻璃纤维过滤器（FGF）。通过将光催化与先进的臭氧氧化技术相结合，自行设计了连续流动反应系统。通过将模拟烹饪油烟通过 FGF，可将烹饪油烟中的 VOC 分解效率提高约 10%。随着入口 VOC 浓度的增加，烹饪油烟中 VOC 的分解效率先增加后降低。在 100ppm 时，VOC 的最大分解效率为 64%。反应温度也表现出类似的趋势，VOC 分解效率在 64%至 68%之间。此外，对于入口臭氧浓度在 1000ppm 以下的情况，入口臭氧浓度对烹饪油烟中 VOC 的分解具有积极影响，而对于入口臭氧浓度高于 1000ppm 的情况，其影响趋于稳定。单独通过臭氧氧化（无论是否有近紫外线照射）可实现 34%的 VOC 分解效率。O+UV/TiO 和 UV/TiO+O 技术可分别实现 75%和 94%的最大 VOC 分解效率。在油烟中添加水后，使用 UV/TiO+O 技术时，VOC 的最大分解效率降低至 79%。通过使用 UV/TiO+O 技术分解油烟中的 VOC 前后比较 VOC 的色谱种类，我们发现油烟中的 TVOC 和 VOC 种类都得到了有效分解。
