Record number :
1001066
Title of article :
Polyelectrolyte multilayer membranes for desalination of aqueous salt solutions and seawater under reverse osmosis conditions
Author/Authors :
Ali Toutianoush، نويسنده , , Wanqin Jin، نويسنده , , Hu¨seyin Deligo¨z، نويسنده , , Bernd Tieke*، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
7
From page :
437
To page :
443
Abstract :
Ultrathin, multilayered membranes of polyvinylamine (PVA) and polyvinylsulfate (PVS) were electrostatically adsorbed on a porous polymer (polyacrylonitrile/polyethylene terephthalate) support. Their use for desalination of aqueous salt solutions, diluted and non-diluted artificial seawater was investigated under reverse osmosis conditions. Using 60 layer pairs of PVA/PVS as separating membrane, it was possible to completely reject MgCl2 and MgSO4 from feed solutions of 1 and 10 mM concentration independently from the operative pressure applied. The rejection of NaCl and Na2SO4 increased from 84 and 96% at 5 bar to 93.5 and 98.5% at 40 bar, respectively. From diluted seawater (1:10; 1:100; 1:1000), 99 1% of Mg2+, 97.0 1% of Ca2+, and 92.5 1% of Na+ were rejected at 40 bar, and from non-diluted seawater, 98 1% of Mg2+, 96.4 1% of Ca2+, and 74.5 0.8% of Na+ were rejected at 40 bar. The permeation flux J increased linearly with the pressure applied. For a membrane of 60 PVA/PVS layer pairs, a flux value of 4 0.2 L m 2 h 1 was found at 40 bar. The influence of the number of deposited layer pairs on R and J was also investigated.
Keywords :
polyelectrolyte , Multilayer , Membrane , layer-by-layer , seawater desalination , Reverse osmosis , Ion separation
Journal title :
Applied Surface Science
Journal title :
Applied Surface Science
Serial Year :
2005
Link To Document :
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