Abstract：
The chemistry of ozone (O3) on indoor surfaces leads to secondary pollution, aggravating the air quality in indoor environments. Here, we assess the heterogeneous chemistry of gaseous O3 with glass plates after being 1 month in two different kitchens where Chinese and Western styles of cooking were applied, respectively. The uptake coefficients of O3 on the authentic glass plates were measured in the dark and under UV light irradiation typical for indoor environments (320 nm < λ < 400 nm) at different relative humidities. The gas-phase product compounds formed upon reactions of O3 with the glass plates were evaluated in real time by a proton-transfer-reaction quadrupole-interface time-of-flight mass spectrometer. We observed typical aldehydes formed by the O3 reactions with the unsaturated fatty acid constituents of cooking oils. The formation of decanal, 6-methyl-5-hepten-2-one (6-MHO), and 4-oxopentanal (4-OPA) was also observed. The employed dynamic mass balance model shows that the estimated mixing ratios of hexanal, octanal, nonanal, decanal, undecanal, 6-MHO, and 4-OPA due to O3 chemistry with authentic grime-coated kitchen glass surfaces are higher in the kitchen where Chinese food was cooked compared to that where Western food was cooked. These results show that O3 chemistry on greasy glass surfaces leads to enhanced VOC levels in indoor environments.
摘要：
室内表面的臭氧（O3）化学会导致二次污染，恶化室内环境的空气质量。这里,我们在两个不同的厨房中使用中式和西式烹饪1个月后，用玻璃板评估气态O3的非均相化学，分别。在黑暗中和在不同相对湿度下在室内环境(320nm<λ<400nm)典型的UV光照射下测量在真实玻璃板上的O3的吸收系数。通过质子转移反应四极杆界面飞行时间质谱仪实时评估了O3与玻璃板反应形成的气相产物化合物。我们观察到O3与食用油的不饱和脂肪酸成分反应形成的典型醛。癸醛的形成，6-甲基-5-庚烯-2-酮(6-MHO),和4-氧芬太尼（4-OPA）也观察到。采用的动态质量平衡模型表明，己醛的估计混合比，octanal,非肛门，decanal,Undecanal,6-MHO,和4-OPA由于O3化学与真正的污垢涂层厨房玻璃表面在中国菜烹饪的厨房比西餐烹饪的厨房更高。这些结果表明，油腻的玻璃表面上的O3化学导致室内环境中VOC水平提高。
