✦ LIBER ✦

Dynamic polyacrylamide membranes in the reverse osmosis

✍ Scribed by S. Antoniou; J. Springer; A. Grohmann

Publisher: Elsevier Science
Year: 1980
Tongue: English
Weight: 557 KB
Volume: 32
Category: Article
ISSN: 0011-9164
DOI: 10.1016/s0011-9164(00)86005-1

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✦ Synopsis

Dynamic formation of Polyacrylamide membranes on a Millipore filter in the reverse osmosis was optimised concerning rejection of a standard NaCl water solution. Optimised membranes were tested under 70 bars with selected salts in singlesolute water solutions. Ex_clusion of salts with alcali cations depend on the kind of anion and is in the order SO:-> F-5 HCO-> Cl-> NO-> J-. 3 3 Rejection of szlts with alkaline earth cations is generally lower than corresponding salts with alcali cations. Especially concentration dependence of rejection of SO:and NO; through these membranes was tested using different cations. Remarkable is the relatively high rejection of Na2SOq, which is 93,6% for a 5 g/l water solution under a flux of 620 l/m2-d. Dynamic PAA membranes are not useful for sea water desalination but they could be used for treatment of water with higher SO:-content.

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