quote author=68474D50046E484D4E4C5D290 link=1245718204/15#15 date=1246014887]
A high DO level in a community water supply is good because it makes drinking water taste better.
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Originally posted by 62464F4F4C4C7662465A4446290 link=1245718204/11#11 date=1245905309
Solubility of solutes as a function of temperature
(mg of solutes per liter of water):
O2 = oxygen, CO2 = carbon dioxide
Solute Temperature (Deg C)
0 20 40 60 80 100
02 69 43 31 14 0 0
CO2 3350 1690 970 580 0 0
http://www.sensorex.com/support/education/DO_education.html
This table indicates the amount of dissolved atmospheric gasses presumably at a standard atmospheric composition and pressure.
This table indicates what the equilibrium concentrations are for water at various temperatures. When heating a container of water, by the time it has been heated to 80 degrees C it will have given up any dissolved oxygen and carbon dioxide, what delay if any, in reaching this state is not indicated. I would guess it would not be a long delay.
If the same container of water was cooled, to re-saturate the water with these solutes would be quite a slow process.
The solute concentration in the overlying atmosphere and the surface area available for gas exchange would have a bearing on the time required (an aquarium pump or paddle wheel would increase the available surface area for gas exchange).
Not too dry as a topic I hope?
Lindsay



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