上海气溶胶中可溶态营养盐含量及影响因素.pdfVIP

2013,33(8) 1345~1353 China Environmental Science 1* 2 2 2 , , , (1., 200062 2. , 200062) ,, 2007 6 2009 3 27 ,NO3+NO2NH4+PO43SiO32.MilliQ (pH2), /(94%)(96%),(34%)(50%). ,.NO3+NO2NH4+ ,PO43SiO32., ,. X513 A 2013 1* 2 Concentration and impacting factors of soluble nutrients in aerosols, Shanghai. ZHANG An-yu , ZHANG Guo-sen , FENG Chong2 2 , ZHANG Jing (1.School of Resources and Environment Science, East China Normal University, Shanghai 200062, China 2.State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China). China Environmental Science, 2013,33(8)1345~1353 Abstract To investigate the concentration and variation of soluble nutrients in the aerosols of Shanghai, 27 aerosol samples were collected from June 2007 to March 2009 in East China Normal University and analyzed for the soluble nutrients, including NO3-+NO2-, NH4+, PO43 -and SiO32. By continuous leaching with Milli-Q water and hydrochloric acid (pH2), most of the nitrate/nitrite (94%) and ammonium (96%) could be leached in the first step, but the amount of silicate (34%) and phosphate (50%) dissolved in water was equal to or less than that in hydrochloric acid. Combine the nutrients concentration with the back trajectory, the origin and transportation process had significant impacts on aerosol nutrients concentration. The weight concentration for NO3-+NO2- and NH4+ showed the highest value in land-sourced aerosols, but there were not much difference for PO43- and SiO32- in different types of aerosols. The volume-weighted concentration of all nutrients were influenced by both sources and precipitation and showed obvious seasonal characteristics,