Size distribution and chemical properties of urban paved road dust in several Chinese cities

ENVR 207

Xiaohua Chen, chenxiaohua@mail.nankai.edu.cn1, Jianhui Wu, envwujh@nankai.edu.cn1, Yinchang Feng, fengyc@nankai.edu.cn1, and Tan Zhu2. (1) College of Environmental Science and Engineering, Nankai University, Weijin Road 94#, Tianjin, 300071, China, (2) State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Weijin Road, 94#, Tianjin, 300071, China
Road dust has been an important origin of urban ambient airborne particulate matter in many Chinese cities. This paper investigated urban paved road dust in three Chinese cities: Taiyuan, Shijiazhuang and Jiaozuo. Mass-size distribution (less than 100 micrometer) was measured in a 9-interval (size) pattern and chemical components, including 19 elemental species, four ion species and total carbon (TC) and organic carbon (OC) were analyzed for abundances. The size distribution results indicated that paved road dust had a very small portion of inhalable particles. Some chemical species like Ca and TC were found enriched for a few-fold in paved road dust when compared to local soil dust. Finally, paved road dust was apportioned to primary sources by a chemical mass balance model and the results showed that soil dust was the most significant contributor to paved road dust.
 

General Papers
6:00 PM-8:00 PM, Wednesday, 13 September 2006 Moscone Center -- Hall D, Poster

Division of Environmental Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006