Atmospheric particulate mercury concentration and its dry deposition flux in Changchun City, China.
From July 1999 to January 2000, we determined the particulate mercury [Hg(p)] concentration in the atmosphere of five function sites and one contrast site in the city of Changchun, China. During non-heating season, the Hg(p) concentration in air in urban areas ranged from 0.022 to 0.398 ng m(-3) with an average of 0.145 ng m(-3), and at the contrast site with an average of 0.084 ng m(-3). During the heating season, the Hg(p) concentration in urban areas was in the range of 0.148-1.984 ng m(-3) with an average of 0.461 ng m(-3) and with an average of 0.211 ng m(-3) at the contrast site. The Hg(p) concentration during heating season is two times higher than that during non-heating time. Coal burning and wind-blown soil material are the two important sources of Hg(p). Wind-blown soil material contributes 7.9-38.5% to the Hg(p) with an average of 24.1% in urban area. A theoretical model was used to estimate the dry deposition flux, with results of 43.06 microg m(-2) a(-1) in the urban area and 21.28 microg m(-2) a(-1) at the contrast site.
Fang
F
F
Changchun Institute of Geography, Chinese Academy of Sciences, Jilin, PR China. fangfengman@netease.com
Wang
Q
Q
Li
J
J
D000392:Air Movements; D000393:Air Pollutants / Q000032:analysis*; D004781:Environmental Exposure; D006801:Humans; D008628:Mercury / Q000032:analysis*; D008962:Models, Theoretical; D010316:Particle Size; D012621:Seasons; D014505:Urban Population
D000393:Air Pollutants; D008628:Mercury