Abstract
The pollution characterizations of water-soluble anions of PM2.5(fine particle matter with aerodynamical diameter <2.5 m="" in="" wuhan="" economic="" and="" technological="" development="" zone="" china="" were="" studied="" during="" april="" 2013="" the="" concentration="" of="" pm="" sub="">2.5 and four kinds of water-soluble anions that consisted of fluoride (F-), chloride (Cl-), sulfate (SO42-), and nitrate (NO3-) were determined. The results indicated that the urban air quality in Wuhan was polluted by fine particle matter to some extent. During the monitoring period, there were 50% of the daily mean concentration of PM2.5exceeded the China second-class ambient air quality standards (75μgm-3). The concentrations of water-soluble anions in PM2.5followed the order of SO42-> NO3-> F-> Cl-. SO42-and NO3-were the dominant anions in Wuhan Economic and Technological Development Zone, and contributed more than 70% to the total measured water-soluble anions. The mean ratio of NO3-and SO42-in PM2.5was calculated to be 0.49, which indicated that coal combustion was the major source of PM2.5in Wuhan Economic and Technological Development Zone, China.
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