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Characteristics of a chlorine-resistant reverse osmosis membrane

โœ Scribed by Rajindar Singh

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
687 KB
Volume
95
Category
Article
ISSN
0011-9164

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โœฆ Synopsis

Currently available polyamide (PA) reverse osmosis membranes are highly effective in their intended applications for desalination and industrial process water. However, they offer poor resistance to strong oxidants such as chlorine, resulting in chain deformation and depolymerization of the polymer. Fully aromatic PA membranes were nitrated to improve their resistance to chlorine attack. The salt rejection and flux of these membranes was measured before and after exposure to a sodium hypochlorite solution. The modified membranes showed a remarkable tolerance to chlorine after an accelerated chlorination test. Nitration also produced morphological changes in the polymer resulting in reduced membrane permeability and flux.

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