Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Afmospheru Entwonmenr Vol IS. No 6. pp 1059-1063. 1981 0004-6981'81 061059-10 SO2 00.0 Prmted I" Great Brnam ci 1981 Pergamon Press Ltd
 

Summary: Afmospheru Entwonmenr Vol IS. No 6. pp 1059-1063. 1981 0004-6981'81 061059-10 SO2 00.0
Prmted I" Great Brnam ci 1981 Pergamon Press Ltd
INFLUENCE OF GASEOUS NITRIC ACID ON SULFATE
PRODUCTION AND ACIDITY IN RAIN
JACK L. DURHAM
Envtronmental Sctences Research Laboratory, U.S.Environmental Protection Agency, Research Trtangle
Park, NC 27711, U.S.A.
JOHN H. OVERTON, JR. and VINEYP. ANEJA*
Environmental Sctences Group, Northrop Services, Inc., Research Trtangle Park, NC 27709, U.S.A
(FIW receiued 9 Apd 1980 and ~njnalform 19 Seprember 1980)
Abstract-A physlco-chenmal subcloud rain model ISused to simulate the effect of gaseous HNO, and
NO, on pH and SOi- production in a IOmmh-`, 1000-m fall distance rain event. The ambient gases
constdered m the chemistry were SO,, NO, NO,, HNO,. 0,. and CO,. Ramdrops mtttally at a pH of 5.5
absorbed these gases, and as they fell through a polluted zone, produced SOi- and NO; by the oxidatron of
dissolved SO, by O3 and the dissociation of HN03, which reduced the pH. For the chemical mechanism and
the below-cloud washout rain events considered, it was observed that: absorption of gaseous HN03
controlled the actdification in the initial stages of a ram event, and inhibited the productton of SO: _; NO and
NO, played no dtrect role m theacidification or formation of NO; or SO:-; pre-acidified raindrops (pH of
4) were further acidified only by absorbing HNOJ.
NOTATION

  

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

 

Collections: Environmental Sciences and Ecology; Geosciences