Chitosan/polyvinyl alcohol/hydroxyapatite nanocomposite membrane for the efficient adsorption of Congo red anionic dye

Vahid Zeynali, Seyed Mahmoud Mousavi, Ehsan Saljoughi, Shirin Kiani, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

This work focused on fabricating a novel chitosan/polyvinyl alcohol/ hydroxyapatite (CPH) nanocomposite membrane and its application in removing the Congo red (CR) from aqueous solutions. After proper characterization of the chitosan/polyvinyl alcohol/hydroxyapatite adsorptive membrane, adsorption tests were carried out on the optimum nanocomposite membrane containing 1 wt% hydroxyapatite. The impact of temperature, contact time, initial dye concentration, adsorbent dosage, and pH was investigated. Results of isotherm and kinetic investigation revealed that Langmuir isotherm and pseudo-second order kinetics best fitted experimental results with R2 values of 0.995. A relatively high adsorption capacity of 491 mg/g, higher than that of activated carbon, was achieved.

Original languageEnglish
Pages (from-to)4227-4242
Number of pages16
JournalPolymer Composites
Volume44
Issue number7
DOIs
Publication statusPublished - Jul 2023

Keywords

  • adsorption
  • chitosan
  • membranes
  • nanocomposites
  • separation techniques

ASJC Scopus subject areas

  • Ceramics and Composites
  • General Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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