Nanofiltration of dye solution using chitosan/poly(vinyl alcohol)/ZIF-8 thin film composite adsorptive membranes with PVDF membrane beneath as support


Khajavian M., Salehi E., Vatanpour Sargheın V.

CARBOHYDRATE POLYMERS, vol.247, 2020 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 247
  • Publication Date: 2020
  • Doi Number: 10.1016/j.carbpol.2020.116693
  • Journal Name: CARBOHYDRATE POLYMERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chimica, Compendex, EMBASE, Food Science & Technology Abstracts, MEDLINE, Veterinary Science Database
  • Keywords: Chitosan, Metal-organic frameworks, Membrane adsorbent, Optimization, METAL-ORGANIC FRAMEWORKS, MIXED-MATRIX MEMBRANES, NANOCOMPOSITE MEMBRANES, CARBON NANOTUBES, GRAPHENE OXIDE, PERFORMANCE, REMOVAL, MORPHOLOGY, KINETICS, ZIF-8
  • Istanbul Technical University Affiliated: No

Abstract

Nanobiocomposite adsorptive membranes were engineered by integrating metal-organic frameworks (ZIF-8), into the chitosan/poly(vinyl alcohol) blend and coating the blend on PVDF membrane support for an enhanced separation performance. The membranes were characterized by SEM, AFM, BET, XRD, ATR-FTIR and tensile stress analyses. The central composite design was utilized to optimize the water flux and dye rejection. Using CCD, the effect of the membrane thickness, PEG (pore-former), and chitosan content on the flux and rejection were studied. The optimal conditions were obtained as; 10 wt% PEG, 3 wt% chitosan, and 200 mu m membrane thickness. The optimized flux and rejection were obtained 78.94 L m(-2) h(-1) and 90.3 %, respectively. The antifouling of the membranes was also examined by the filtration of BSA protein solution. The membranes showed comparable performance; however, extremely higher permeability (78.94 L m(-2) h(-1) bar(-1)) compared to similar TFC membranes that guarantee the economic favorability of the filtration process.