title: [Characteristics of aerosol water-soluble inorganic ions in three types air-pollution incidents of Nanjing City].
abstract: In order to compare aerosol water-soluble inorganic species in different air-pollution periods, samples of PM10, PM2.1, PM1.1 and the main water-soluble ions (NH4+, Mg2+, Ca2+, Na+, K+, NO2(-), F(-), NO3(-), Cl(-), SO4(2-)) were measured, which were from 3 air-pollution incidents (continued pollution in October 16-30 of 2009, sandstorm pollution in April 27-30 of 2010, and crop burning pollution in June 14 of 2010. The results show that aerosol pollution of 3 periods is serious. The lowest PM2.1/PM10 is only 0.27, which is from sandstorm pollution period, while the largest is 0. 7 from crop burning pollution period. In continued pollution periods, NO3(-) and SO4(2-) are the dominant ions, and the total anions account for an average of 18.62%, 32.92% and 33.53% of PM10, PM2.1 and PM1.1. Total water-soluble ions only account for 13.36%, 23.72% and 28.54% of PM10, PM2.1 and PM1.1 due to the insoluble species is increased in sandstorm pollution period. The mass concentration of Ca2+ in sandstorm pollution period is higher than the other two pollution periods, and which is mainly in coarse particles with diameter larger than 1 microm. All the ten water-soluble ions are much higher in crop burning pollution especially K+ which is the tracer from crop burning. The peak mass concentrations of NO3(-), SO4(2-) and NH4+ are in 0.43-0.65 microm.
authors.affiliation: Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China. zqc0904@163.com
authors.forename: Qiu-Chen
authors.initials: QC
authors.lastname: Zhang
authors.forename: Bin
authors.initials: B
authors.lastname: Zhu
authors.forename: Ji-Feng
authors.initials: JF
authors.lastname: Su
authors.forename: Hong-Lei
authors.initials: HL
authors.lastname: Wang
mesh_terms: D000336:Aerosols / Q000032:analysis*; D000393:Air Pollutants / Q000032:analysis*; D002681:China; D002947:Cities; D004784:Environmental Monitoring; D017745:Incineration; D007287:Inorganic Chemicals / Q000032:analysis*; D007477:Ions / Q000032:analysis; D052638:Particulate Matter / Q000032:analysis*; D018547:Plant Stems / Q000737:chemistry; D012822:Silicon Dioxide / Q000032:analysis; D012995:Solubility
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D007287:Inorganic Chemicals; D007477:Ions; D052638:Particulate Matter; D012822:Silicon Dioxide