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Changes in water and salt transport during hydrolysis of cellulose acetate reverse osmosis membranes

✍ Scribed by J. Glater; S. McCray


Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
466 KB
Volume
46
Category
Article
ISSN
0011-9164

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✦ Synopsis


Cellulose acetate membranes undergo hydrolytic decomposition which is accelerated at very high or low pH levels.

Hydrolysis results in the loss of acetvl groups leading to a sharp decline in membrane performance.

Minimum hydrolvsis rates occur in the pH range of 4-6.

Cellulose Acetate Membranen.erfahren einen beschleunigten hydrolysischen Verfall in der

Gegenwant von sehr hohen und sehr niedrigen pH Werten. Die Hydrolyse.bewirkt den Verlust von Acetyl Gruppen wodurch die Membranen-Leistung stark herabgemetzt wird. lyse Rate am geringsten. In Bereich eines pH's von 4-F ist die Hydro-Die Durchdringungs-Koeffizienten f'irr Wasser und Salt (A und B) sind vom Acetyl-Gehalt der Membranen abh'dnpig gemlss der Zwie-Parameter-Transportgleichung (Merten et al.).

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