The temperature dependence of the solubility of oxygen in sea water according to the pulsed NMR data

The temperature dependences of the solubility of oxygen in distilled and sea water were obtained over the temperature range 0–90°C on the basis of proton spin—lattice relaxation measurements in degassed and not degassed samples. The temperature dependence of O 2 solubility is approximated by the sum...

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Bibliographic Details
Published in:Russian Journal of Physical Chemistry 2008-05, Vol.82 (5), p.746-752
Main Authors: Mel’nichenko, N. A., Koltunov, A. M., Vyskrebentsev, A. S., Bazhanov, A. V.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Marine
Physical Chemistry
Physical Chemistry of Solutions
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Summary:The temperature dependences of the solubility of oxygen in distilled and sea water were obtained over the temperature range 0–90°C on the basis of proton spin—lattice relaxation measurements in degassed and not degassed samples. The temperature dependence of O 2 solubility is approximated by the sum of exponential functions according to not only relaxation measurement results but also literature data. The temperature dependence of the solubility of O 2 in distilled water can be written as the sum of two exponential functions with the predominance of the first component over the low-temperature interval. The best approximation for sea water has the form of the sum of three exponential functions, the relative contributions of the second and third components being approximately equal. The conclusion was drawn from the temperature dependences obtained that the main mechanism of the solution of oxygen in water was the filling of ice-like formation voids.
ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024408050105