W6 PM Environmental Changes in Response to China's Economic Expansion
Wednesday, 16 November 2005: 1:50 PM - 5:30 PM in 324-326
(ZHU-1118-028259) Pollution and Sources Survey of Polycyclic Aromatic Hydrocarbons in Indoor Air.
Zhu, Lizhong1, Wang, Jing2, Liu, Yongjian3, 1 Zhejiang University, Hangzhou, Zhejiang, PR China2 Zhejiang University, Hangzhou, Zhejiang, PR China3 Zhejiang University, Hangzhou, Zhejiang, PR China
ABSTRACT- The quality of indoor air has an important impact on person′s well being. Polycyclic aromatic hydrocarbons (PAHs) are important pollutants in indoor air, which come from not only outdoor air but also indoor emission sources such as smoking, cooking, heating. In China, the characters of indoor PAHs pollution are significantly different from other countries because of the peculiar Chinese culinary methods and living convention. Thus, pollution and sources survey of PAHs in the resident indoor air Hangzhou, China were conducted. It was indicated that the total average concentration of PAHs in indoor air of eight homes was 1.91-29.08 
g/m3, much higher than that in two homes of Japan. The PAHs concentrations in the rooms were bedroom > kitchen > living room > balcony. Naphthalene was the most abundant PAHs found in indoor air, it contributed more than 60% to the sum of PAHs. The levels of PAHs, BaP in the smokers′ homes were 1.2-11.6 and 1.1-3.0 times higher than that in the nonsmokers′ homes, respectively. Conventional Chinese cooking practices were responsible for such heavy indoor PAHs pollution. The PAHs emissions from cooking practice related to the cooking method, fat content of the food, cooking oils and temperature. It was found that boiling produced the least levels of PAHs. For fish, a low-fat food, frying it produced a larger amount of PAHs compared to broiling practice, except pyrene and anthracene. Heating at the same temperature, the PAHs concentrations in different oil-fumes were lard > soybean oil > rape seeds oil. An increase in cooking temperature increased the levels of PAHs, especially acenaphthene.
Key words: Polycyclic Aromatic Hydrocarbons, Indoor air, Source