Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
Characteristics of Reverse Osmosis Membrane
Studies on Treatment of Sea Water by Reverse Osmosis Process (Part I)
Hayao OKAMOTOHideo YAMAMOTOHiroshi SAITO
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1968 Volume 21 Issue 6 Pages 245-251

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Abstract

Study was conducted on the relation between characteristics of membrane and preparing conditions or operation factors for desalination of salt solution with the reverse osmosis membrane from cellulose acetate-formamid-acetone system similar to Loeb.
Although the evaporation process of acetone was important to the formation of thin surface layer of membrane, but the effect of it was reduced at higher temperature. The characteristics of membrane was easily controlled by temperature and the optimum was found to be about 80°C
When the membrane was subjected to variation of temprature of feed solution, history phenomenon was found in flux of desalted water. This phenomenon is the similar to the case in variation of operating pressure.
In sea water, the orders of ion rejection among cations and anions were Mg2+>Ca2+>Na+>K+and SO42->Cl-, respectively.

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