Performance of an optimized Zr-based nanoparticle-embedded PSF blend hollow fiber membrane in treatment of fluoride contaminated water

Jinsong He, Tiong Shie Siah, J. Paul Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

Abstract

Consumption of water that has excessive fluoride can cause adverse health impacts on human beings. A Zr-based nanoparticle-embedded PSF blend hollow fiber membrane was successfully prepared and optimized for removal of fluoride from the aqueous solution. Both static and dynamic adsorption of fluoride on the membrane was investigated. It was showed that the membrane could effectively remove fluoride within a wide pH ranging from 3 to 10. At neutral pH, the adsorption equilibrium was reached within 24h. The maximum adsorption capacity of the optimized membrane was 60.65mg/g, much higher than many commercial adsorbents. The presence of NO3-, SiO32- or HA has insignificant effects on the fluoride removal. However, the removal was retarded as the concentration of HCO3- or PO43- was increased. Furthermore, the membrane could remove fluoride efficiently through the continuous filtration, even in presence of natural organic matters. The spent membrane could be regenerated and then reused for the removal of fluoride with great efficiency. The adsorption history could be well described by an intraparticle diffusion model. The XPS analysis showed that the adsorption of fluoride was mainly associated with the ion-exchange between SO42- and F- ions. Finally, the toxicity analysis revealed that the treated water was safe for human consumption.

Original languageEnglish
Pages (from-to)88-97
Number of pages10
JournalWater Research
Volume56
DOIs
StatePublished - 1 Jun 2014
Externally publishedYes

Keywords

  • Adsorption
  • Filtration
  • Fluoride
  • Hollow fiber membrane
  • Nano particle
  • Toxicity
  • XPS
  • Zirconium

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