Enhanced negative charge of polyamide thin-film nanocomposite reverse osmosis membrane modified with MIL-101(Cr)-Pyz-SO3H

Mohammad Mehrabi, Vahid Vatanpour*, Oğuz Orhun Teber, Majid Masteri-Farahani, Saeideh Sadat Mortazavi, Alireza Abbasi, Ismail Koyuncu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Negatively charged MIL-101(Cr)-Pyz-SO3H nanoparticles (NPs), with several concentrations (0.001–0.02 wt%), were used as a hydrophilic and charge modifier to make a high performance thin-film nanocomposite reverse osmosis membrane (TFC RO) through the interfacial polymerization between 1,3-phenylenediamine (MPD) and trimesoyl chloride (TMC) monomers. Surface analyses revealed smoother surfaces and higher hydrophilicity for the modified membranes. The zeta potential investigation approved rising the negative surface charge of MIL-101(Cr)-Pyz-SO3H NPs embedded RO membranes. The desalination performance displayed that 0.005 wt% MIL/RO indicated the most incredible separation efficiency for NaCl (98.05%). The desalination performance of seawater was also studied. Observations showed that 0.005 wt% MIL/RO means the best separation efficiency for seawater desalination (94.46%). Water flux for the modified membranes improved and reached the maximum value of 41.4 L/m2.h in 0.005 wt% MIL-101(Cr)-Pyz-SO3H TFC RO membrane. The fouling resistance of the membranes was identified by filtration of humic acid (HA)/NaCl solution. The obtained results demonstrated that modified membranes improved fouling resistance, and the highest fouling resistance was recorded for 0.005 wt% MIL-101(Cr)-Pyz-SO3H TFC RO membrane.

Original languageEnglish
Article number121066
JournalJournal of Membrane Science
Volume664
DOIs
Publication statusPublished - 15 Dec 2022

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

  • Desalination
  • Hydrophilicity
  • Interfacial polymerization
  • MIL-101(Cr)-pyz-SOH NPs
  • Metal organic frameworks
  • RO membrane

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