Removal of fluoride ions from water by cerium-carboxymethyl cellulose beads doped with CeO2 nanoparticles

Kahya N., Erim F. B.

International Journal of Biological Macromolecules, vol.242, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 242
  • Publication Date: 2023
  • Doi Number: 10.1016/j.ijbiomac.2023.124595
  • Journal Name: International Journal of Biological Macromolecules
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, EMBASE, Food Science & Technology Abstracts, INSPEC, MEDLINE, Veterinary Science Database
  • Keywords: Ceria, Defluoridation, Water treatment
  • Istanbul Technical University Affiliated: Yes


A novel adsorbent for fluoride ions (F−) removal was prepared from cerium ion cross-linked carboxymethyl cellulose (CMC) biopolymer beads loaded with CeO2 nanoparticles (NPs). The characterization of the beads was performed by swelling experiments, scanning electron microscopy and Fourier transforms infrared spectroscopy. The adsorption of fluoride ions from aqueous solutions was carried out with both cerium ion cross-linked CMC beads (CMC[sbnd]Ce) and CeO2-NPs added beads (CeO2-CMC-Ce) in a batch system. Optimized adsorption conditions were obtained by testing the parameters such as pH, contact time, adsorbent dose, and shaking rate at 25 °C. The adsorption process is well described by the Langmuir isotherm and pseudo-second-order kinetics. The maximum adsorption capacity was found as 105 and 312 mg/g F− for CMC-Ce and CeO2-CMC-Ce beads, respectively. Reusability studies showed that, the adsorbent beads have exhibited excellent sustainable properties up to 9 cycle usage. This study suggests that, CMC-Ce composite with CeO2 nanoparticles is a very effective adsorbent in removing fluoride from water.