BEHAVIOR OF SULFATE, NITRATE AND OTHER POLLUTANTS IN THE LONG-RANGE TRANSPORT OF AIR-POLLUTION

Behavior of sulfate, nitrate and other secondary pollutants in the long-range transport of air pollution was investigated by a co-operative field observation. Gaseous HNO//3 and particulate NO//3** minus , SO//4**2** minus and NH//4** plus increased notably along the route of the polluted air mass. In the inland area, the ion balance in aerosol between SO//4**2** minus , NO//3** minus , Cl** minus , NH//4** plus , Na** plus , K** plus , Ca**2** plus and Mg**2** plus was usually good. However, when the long-range transport over 150 km caused high concentration of oxidants (Ox) in this area, the ion balance leaned towards the anion side. From this, the existence of droplets of H//2SO//4 or NH//4HSO//4 was suggested. Gaseous HNO//3 was converted into the aerosol phase when the polluted air mass moved over the mountain pass and was transported into the mountainous region.