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methods for separating nacl from solutions.
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HowcanNaClbeseparatedfromotherdissolvedsalts?Iwanttoknowtheeasiestwaytoremovesodiumchloridefromasolutionandstillretaintheotherminerals.sireno@netonecom.net
Dissolvedsaltsareusuallyremovedusingeitherdeionizationorreverseosmosis.Deionizationpassesthewateroverionexchangeresins,whichadsorbdissolvedions.ReverseosmosisiswhatKevinCostnerdidintheopeningsceneof"Waterworld":forcepressurizedwateracrossamembranewhichisimpermeabletodissolvedsalts.Neitherapproachwillselectivelyremovesodiumchloride,though.
Thesimplestapproachwouldprobablybedeionization,followedbyreplacementofthedissolvedmineralsremovedinthedeionization.
1. Determinetheconcentrationofthemineralcomponentsyouwanttokeep.2. Passthewaterthroughadeionizer.Thisisacolumnpackedwithmixedcationandanionexchange
resins.ThecationexchangeresinwillremovetheNa+ions,replacingthemwithH+ions.Itwillalsoreplacethecalciumandmagnesiumandothercations.Theanionexchangeresinwillreplacethechloridewithhydroxideions.Thehydroxideionswillneutralizethehydrogenionsproducedinthepreviousstep.Theanionexchangeresinwillalsotakesulfateoutofthewater.
3. Replacethemineralcomponentslostinthecationandanionremovalprocesses.
Thealternativeapproach,reverseosmosis,isoutlinedhere.
Author:[email protected]
GeneralChemistryOnline!HowcanNaClbeseparatedfromotherdissolvedsalts?
Copyright19972010byFredSeneseComments&[email protected]/15/10.URL:http://antoine.frostburg.edu/chem/senese/101/matter/faq/printseparatingnaclfromdissolvedsalts.shtml