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Potential for desalination using lower critical solution temperature polymers: Concentration of salt solutions by pluronic PE6200
Author(s) -
Maurdev George,
Millington Keith R.
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.30309
Subject(s) - lower critical solution temperature , desalination , polymer , extraction (chemistry) , salt (chemistry) , volume (thermodynamics) , poloxamer , adsorption , chemistry , chemical engineering , seawater , cloud point , chromatography , thermodynamics , membrane , organic chemistry , copolymer , biochemistry , physics , oceanography , engineering , geology
A commercially available lower critical solution temperature (LCST) polymer was demonstrated to preferentially adsorb water containing a reduced ion concentration, from CrCl 3 salt solutions and release some of this scavenged water at higher temperatures. The scavenging ability of the polymer was demonstrated to be dependent on the bulk salt concentration. The volume of water scavenged and the concentration of the remaining CrCl 3 solution increased linearly with the amount of LCST polymer (Pluronic PE 6200) used. Both the volume of water removed and the amount by which the remaining CrCl 3 solution was concentrated decreased with increasing CrCl 3 concentration. Implications for research into a novel method for sea water desalination are addressed. We also show water extraction from dilute sodium chloride and sea water, and that these results are consistent with the CrCl 3 model system. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009