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Geochemical fractionation during mass transfer from sea to air by breaking bubbles Cover

Geochemical fractionation during mass transfer from sea to air by breaking bubbles

Open Access
|Jan 1970

Abstract

Physico-chemical hydrodynamics of bubble-breaking and surface chemistry together will explain many of the anomalous ion-ratios reported for the marine component of atmospheric aerosols and precipitation.

The “enrichment” of phosphate in bubble-produced aerosol from a solution containing radioactive P-32 and Na-22 is defined as

E = (P-32/Na-22) aerosol/(P-32/Na-22) solution – 1

and is positive for all solutions studied. Phosphate is always present in excess in drops from breaking bubbles. For jet drops, E lies between 0.01 and 10; for drops from film caps which have drained and lost nearly all of their bulk solution, E may rise as high as 1000. Phosphate is preferred to chloride as a counter-ion below positively-charged surfactants, and also seems to be bound to peptide-like uncharged materials.

The mechanism is not specific for phosphate, but can be invoked to explain the enrichment of any constituent of marine aerosol whose absolute ionic potential is greater than Na+ or Cl-.

Language: English
Page range: 451 - 462
Submitted on: Apr 23, 1969
Accepted on: Apr 7, 1970
Published on: Jan 1, 1970
Published by: Stockholm University Press
In partnership with: Paradigm Publishing Services

© 1970 Ferren MacIntyre, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.