Water Purification - Condensation
Water Purification - Condensation
(OP)
I was wondering if someone could answer or direct my question:
What types of impurities (chemical, etc) are left in water if any, after condensing water on a clean surface?
What types of impurities (chemical, etc) are left in water if any, after condensing water on a clean surface?





RE: Water Purification - Condensation
Clean surface and pure water are hypothetical.
Regards,
RE: Water Purification - Condensation
Generally, raw water wouldn't have liquids like that in it, and most of the crud and disolved minerals would be removed by distallation.
RE: Water Purification - Condensation
I was curious to know if anything could stay with water through the process of evaporation/boiling then condensation in its own container.
I realize that through boiling any chemicals in the water with a lower boiling point would boil first, and that if you held the temperature at 100 celcius that you would (hopefully) only be boiling water but I wasn't sure if there were any exceptions I was unaware of.
Are there special circumstances where boiling at 100 celcius and condensing the steam leaves more than just water?
RE: Water Purification - Condensation
U.S. Navy practice for distilling potable water is to do so at a temperature no less than 140°F (in a reduced-pressure system), as evaporation/condensation is no guarantee of bug-free H2O.
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RE: Water Purification - Condensation
Vapor velocity is the key to remove suspended particulate matter. Multicolumn distillation stills use film evaporation and centrifugal seperation to remove impurities including viable and nonvialbe matter.
RE: Water Purification - Condensation
Lets say then that you have water from a salty swamp, with all kinds of things in it, including toxic substances for the sake of it.
If I put that mixture into a pot, and boiled it continuously then condensed the vapour I would still get filth at the other end? Even if like I said before, you maintained at temperature of 100C? I know I seem very dense, but this is directly contradictory to what I learned about differeing boiling points in school.
RE: Water Purification - Condensation
Thank you everyone for helping me with your insightful posts!
RE: Water Purification - Condensation
http://www.apswater.com/page52.html
As you can see, there are traces of impurities.
Distillation of seawater will give you water suitable for drinking water. The amount of impurities is much higher.
Other than that, you have asked a general question which makes it difficult to provide further information without knowing the context in which the question is asked. If you want a more precise answer, refer to: http://www.eng-tips.com/faqs.cfm?fid=1083
RE: Water Purification - Condensation
Bimr, can you suggest any books or websites to read about the fundamentals of your post? I believe that is the best place to start, and will give me the most releveant information based on what you said.
To completely specify my problem: I am experimenting with a boiler/condenser system which will use an unspecified water source to be condensed into "clean" water. Since it may use swamp water, sea water, or fresh water and I did not know what would survive the process. Since I bought all my beer in university, I hadn't even heard about fractional distillation before!
Any suggested references would be greatly appreciated!
RE: Water Purification - Condensation