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Journal of Atmospheric Chemistry

, Volume 7, Issue 1, pp 1–18 | Cite as

The solubility and behaviour of acid gases in the marine aerosol

  • P. Brimblecombe
  • S. L. Clegg
Article

Abstract

The following Henry's law constants (KH/mol2kg-2atm-1) for HNO3 and the hydrohalic acids have been evaluated from available partial pressure and other thermodynamic data from 0°–40°C, 1 atm total pressure: HNO 3 , 40°C–5.85×105; 30°C–1.50×106; 25°C–2.45×106; 20°C–4.04×106; 10°C–1.15×107; 0°C–3.41×107. HF, 40°C–3.2; 30°C–6.6; 25°C–9.61; 20°C–14.0; 10°C–32.0; 0°C–76. HCl, 40°C–4.66×105; 30°C–1.23×106; 25°C–2.04×106; 20°C–3.37×106; 10°C–9.71×106; 0°C–2.95×107. HBr, 40°C–2.5×108; 30°C–7.5×108; 25°C–1.32×109; 20°C–2.37×109; 10°C–8.10×109; 0°C–3.0×1010. HI, 40°C–5.2×108; 30°C–1.5×109; 25°C–2.5×109; 20°C–4.5×109; 10°C–1.5×1010; 0°C–5.0×1010. Simple equilibrium models suggest that HNO3, CH3SO3H and other acids up to 10x less soluble than HCl displace it from marine seasalt aerosols. HF is displaced preferentially to HCl by dissolved acidity at all relative humidities greater than about 80%, and should be entirely depleted in aged marine aerosols.

Key words

Hydrobromic acid hydrochloric acid hydrofluoric acid hydro-iodic acid nitric acid methanesulphonic acid solubility Henry's law seasalt aerosol degassing activity coefficient Pitzer model fluoride depletion 

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Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • P. Brimblecombe
    • 1
  • S. L. Clegg
    • 1
  1. 1.School of Environmental SciencesUniversity of East AngliaNorwichU.K.

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