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ENVIRONMENTAL Environmental Pollution 102,Sl (1998)263-268

Environmental Pollution 102,Sl (1998)263-268
Analysis of ammonia, ammonium aerosols and acid gases in
the atmosphere at a commercial hog farm in eastern
North Carolina, USA
Ronald B. McCulloch"*, G. Stephen Fewa, George C. Murray, Jr." and Viney P. Anejab
"North Carolina Department of Environment and Natural Resources, Division of Air Qua&, Raleigh, NC 27426, USA
bNorth Carolina State University,Department of Marine, Earth and Atmospheric Science, Raleigh, NC 27695, USA
Received 27 March 1998;accepted 9 September 1998
Measurements of atmospheric ammonia, acid gases, and ammonium aerosols were made at a commercial hog farm in Eastern North
Carolina, USA, during September through December of 1997. Annular denuder systems (ADS) were used to sample gaseous
(hydrogen chloride, nitrous acid, nitric acid, sulfur dioxide and ammonia) and fine aerosol (ammonium, chloride, nitrate, and sulfate)
species. Ammonia and ammonium concentrations were determined by calorimetric analysis of the sample extracts. The acid gases
and remaining fine particle ionic species were determined by ion chromatographic analysis of the sample extracts. Mean
concentrations of the gaseous hydrogen chloride, nitrous acid, nitric acid, sulfur dioxide and ammonia were 0.743&m3, 0.255p.g/m3,
0.154 &m3, 2.968/lg/m3, and 10.48&m3, respectively. Mean concentrations of the fine particle chloride, nitrate, sulfate and
ammonium were 0.321&m3, 0.548cLglm3,3.247@m3, and 1.102&m3, respectively. The fine aerosol fraction was dominated by
ammonium sulfate particles. A linear regression of sulfate versus ammonium by equivalent concentration showed a slope of 0.715


Source: Aneja, Viney P. - Department of Marine, Earth and Atmospheric Sciences, North Carolina State University


Collections: Environmental Sciences and Ecology; Geosciences