کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9567073 | 1388384 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Polyelectrolyte multilayer membranes for desalination of aqueous salt solutions and seawater under reverse osmosis conditions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
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 mâ2 hâ1 was found at 40 bar. The influence of the number of deposited layer pairs on R and J was also investigated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 246, Issue 4, 30 June 2005, Pages 437-443
Journal: Applied Surface Science - Volume 246, Issue 4, 30 June 2005, Pages 437-443
نویسندگان
Ali Toutianoush, Wanqin Jin, Hüseyin Deligöz, Bernd Tieke,