Size distribution of suspended particulates in different areas and seasons as a function of their sulphate and ammonium content.
The size distribution of particles as a function of sulphate, ammonium and total suspended particulates was investigated in the air of two urban and one industrial area in winter and in summer. An Andersen cascade impactor was used for sampling. Regardless of the character of the area and irrespective of season the size weight distributions of sulphate and ammonium-containing particles were comparable in all separation stages. A relatively high value of equivalent ammonium ion/sulphate ion ratio for separation stages IV and V for the urban areas as well as a good correlation between sulphate and ammonium ion concentrations were determined. The results support the assumption of ammonium ion being a dominant cation which binds to sulphates in urban atmospheres.
Gentilizza
M
M
Institute for Medical Research and Occupational Health, Zagreb, Yugoslavia.
Vadjić
V
V
D000393:Air Pollutants / Q000032:analysis*; D010316:Particle Size; D000644:Quaternary Ammonium Compounds / Q000032:analysis*; D012621:Seasons; D013431:Sulfates / Q000032:analysis*; D015022:Yugoslavia
D000393:Air Pollutants; D000644:Quaternary Ammonium Compounds; D013431:Sulfates