Retention of organic matter by cellulose acetate membranes cleaned with hypochlorite

The results of current study indicate that despite partial disintegration, flux drop and loss of mechanical strength, proper pretreatment is effective for retention of organic matter by UF membranes. Minor difference in organic content of permeates of pristine and chlorine-treated membranes were observed. The possible pathways of gradual degradation of cellulose surface, with formation of carboxyl, aldehyde and ketone end groups were described. Enlargement of membrane's pore size was followed with streaming potential measurements.