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- W1966109414 abstract "A comprehensive survey for atmospheric pollution was carried out from February to December 2001 in Nanjing city in order to better control the problem. As part of the work, the current study mainly aims at the chemical characterization of water-soluble species of PM10 and PM2.5 atmospheric aerosols, together with their spatial variations. Much heavier particle loadings is observed in Nanjing city, which is more than 4–6 times of NAAQS of the USA, especially fine particles. During the sampling time, 63–77% of PM10 mass is in the PM2.5 fraction. Water-soluble fractions of PM10 and PM2.5 are acidic, and the acidity of PM2.5 is stronger than that of PM10. Water-soluble organic carbon, accounting for about 10% of particle mass, is the most significant component of the water-soluble fraction and shows no clear spatial variations. NO3−, SO42−, NHx (ammonia and ammonium), Ca2+, K+ and Na+ are also abundant in PM10 and PM2.5 aerosols. Among the detected water-soluble inorganic chemicals SO42− presented the first highest level of concentration in PM10 (16.70–23.51 μg/m3, 3.3–10.9% of the PM10 mass) and in PM2.5 (13.19–20.24 μg/m3, 3.8–11.2% of the PM2.5 mass), NO3− and NHx are the second highest level of chemicals followed by Ca2+, K+ and Na+. Nearly all those water-soluble inorganic components displayed the higher level of concentrations in the traffic center (SY) and the downtown area (FZ), and presented the lower level of concentrations in the scenery district and the residential area. The total mass of water-soluble fraction, including inorganic species and organic chemicals, also presented the higher concentrations (78.97–108.68 μg/m3, 15.7–42.9% of particle mass) at both sites of SY and FZ." @default.
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- W1966109414 date "2003-07-01" @default.
- W1966109414 modified "2023-10-17" @default.
- W1966109414 title "Chemical characterization of water-soluble components of PM10 and PM2.5 atmospheric aerosols in five locations of Nanjing, China" @default.
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- W1966109414 doi "https://doi.org/10.1016/s1352-2310(03)00271-1" @default.
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