Water defluoridation using a nanostructured diatom-ZrO2 composite synthesized from algal Biomass

Megha Thakkar, Zheqiong Wu, Liping Wei, Somenath Mitra

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


Frustules or the rigid amorphous silica cell wall of unicellular, photosynthetic microalgae with unique porous architecture has been used to synthesize a composite by immobilizing ZrO2 on its surface and in the pores. This was effective in water defluoridation. The average diameter of the composite was 80±2nm and surface area was 140m2/g. The adsorption isotherms followed both Langmuir and Freundlich models, and the composite was regenerable. Adsorption kinetics followed second order model and the adsorption capacity was as high as 11.32mg/g, while the Langmuir maximum adsorption capacity (qm) reached 15.53mg/g. The research findings highlight the potential of diatoms as hosts for nanomaterials for use in water treatment.

Original languageEnglish (US)
Pages (from-to)239-245
Number of pages7
JournalJournal of Colloid And Interface Science
StatePublished - Jul 5 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry


  • Adsorption
  • Composite
  • Defluoridation
  • Diatom
  • ZrO


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