I'm interested in PM2.5 monitoring exposure of individuals in rural or urban areas, but if anyone has a favourite example of some especially good air quality studies, I'm like to learn more.
The article "Assessment of population exposure to particulate matter pollution in Chongqing, China" (doi:10.1016/j.envpol.2007.07.030) might be helpful for your study.
And "Characterization, health risk of heavy metals, and source apportionment of atmospheric PM2.5 to children in summer and winter: an exposure panel study in Tianjin, China" (doi:10.1007/s11869-014-0289-0)
I'd suggest the research of Dr. Yifang Zhu, now at UCLA Medical School. She has developed novel engineering/testing techniques to help study the human impacts of exposure to UFPs (ultra-fine particles even smaller than the PM2.5 range) along with other sorts of pollutants. I believe her various footnotes, comparing her studies with earlier research, likely would also point toward a range of studies of health impacts from more "normal" and more fully studied pollution. Some of her studies have been of urban areas of China; some have been of populations in the U.S.
Maybe the atricle--'Relationship between Air Pollutants and Economic Development of the Provincial Capital Cities in China during the Past Decade' could help. Good luck! http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0104013