Alginate fouling reduction of functionalized carbon nanotube blended cellulose acetate membrane in forvvard osmosis

CHOI H., SON M., YOON S., Celik E., KANG S., PARK H., ...More

CHEMOSPHERE, vol.136, pp.204-210, 2015 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 136
  • Publication Date: 2015
  • Doi Number: 10.1016/j.chemosphere.2015.05.003
  • Journal Name: CHEMOSPHERE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.204-210
  • Keywords: Forward osmosis, Nano-enhanced membrane, Alginate fouling, Electrostatic repulsion, Carbon nanotube, THIN-FILM NANOCOMPOSITE, HOLLOW-FIBER MEMBRANES, ULTRAFILTRATION MEMBRANE, ENHANCED PERFORMANCE, DESALINATION, COMPOSITE, DRAW, FABRICATION, NANOFILTRATION, NANOPARTICLES
  • Süleyman Demirel University Affiliated: Yes

Abstract

Eunctionalized multi-walled carbon nanotube blended cellulose acetate (fCNT-CA) membranes were synthesized for forward osmosis (FO) through phase inversion. The membranes were characterized through SEM, FTIR, and water contact angle measurement. AFM was utilized to investigate alginate fouling mechanism on the membrane. It reveals that the fCNT contributes to advance alginate fouling resistance in FO (57% less normalized water flux decline for 1% fCNT-CA membrane was observed than that for bare CA membrane), due to enhanced electrostatic repulsion between the membrane and the alginate foulant. Furthermore, it was found that the fCNT-CA membranes became more hydrophilic due to carboxylic groups in functionalized carbon nanotube, resulting in approximately 50% higher water-permeated flux than bare CA membrane. This study presents not only the fabrication of fCNT-CA membrane and its application to FO, but also the quantification of the beneficial role of fCNT with respect to alginate fouling in FO. (C) 2015 Elsevier Ltd. All rights reserved.