Title
Performance of carboxymethyl cellulose/polysulphone membranes prepared via different immersion methods for salt rich waters
Authors
HANANE ABURIDEH, ZAHIA TIGRINE, DJAMILA ZIOUI, SARRA HOUT, LAMINE AOUDJIT and MOHAMED ABBAS

Received February 13, 2023
Published Volume 57 Issue 7-8 July-August
Keywords carboxymethylcellulose (CMC), coating, crosslinking, composite membrane, lactic acid, glutaraldehyde

Abstract
The main objective of this work has been to carry out the synthesis of composite membranes from carboxymethyl cellulose (CMC)/polysulfone (PSf) by the crosslinking of glutaraldehyde (GA) or lactic acid (LA), using the non solvent induced phase separation (NIPS) method. The effects of different parameters, such as the type and degree of crosslinking, the immersion method, and the coating procedure, including the thermal treatment have been studied. The prepared membranes were analyzed in terms of water absorption and flux, as well as their efficiency in retaining salt ions from synthetic waters rich in mono/divalent salts and real seawater samples. The optimized membrane containing 2% by weight of CMC and 2% of lactic acid as crosslinking agent, coagulated by immersion for 10 min, represented a rejection efficiency of 97.3%, 88.3% and 34% for the solutions of MgSO4, CaCO3 and NaCl, respectively. The optimal membrane recorded a pure water flux of 127.37 L/m²h, under a low transmembrane pressure of 10 bars, and permeability of 26 L/m² h bars. The membrane flux recovery rate was greater than 94%, indicating satisfactory resistance to fouling.