Written by V R Sunday, 09 January 2011 16:14
Osmosis is the passage of solvent molecules from a lower concentrated region to higher concentrated region through a semipermeable membrane,as a result of this a pressure is created in the liquid known as osmotic pressure.When a pressure higher than osmotic pressure is applied externally,osmosis takes place in the opposite direction which is known as reverse osmosis.In reverse osmosis pure solvent is separated from its contaminants rather than removing contaminants from water.
The sea water which is to be purified is taken in a tank separated by a membrane with pure water,a high pressure is applied to the sea water to force the pure water out through the membrane.leaving behind the dissolved impurities whether it may be ionic or non ionic in nature.
The membrane used for this process is also known as super filtration or hyper filtration membrane.
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