Preparation and characterization of sodium iron titanate ion exchanger and its application in heavy metal removal from waste waters

Marceline N. Akieh, Manu Lahtinen, Ari Väisänen, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

63 Citations (Scopus)

Abstract

The ion exchange properties of sodium iron titanates, namely, NaFeTiO4, Na2Fe2Ti6O16 and iron-doped sodium nonatitanate were investigated. Conventional solid state and sol-gel methods were used in the synthesis of the sodium iron titanates. Structural characterization of the materials was performed with powder X-ray diffraction (XRD), thermogravimetry (TG), scanning electron microscopy (SEM) equipped with energy dispersive spectrometer (EDS) and with inductively coupled plasma optical emission spectrometry (ICP-OES). Based on TG analyses, the novel iron-doped sodium nonatitanate was proven to be a member of the layered titanate family. The different sodium iron titanates were compared based on the efficiency in separating Ni from aqueous streams by conducting batch experiments with a batch factor of 1000 ml/g. Iron-doped sodium nonatitanate exhibited the best ion exchange performance compared to the other sodium iron titanates studied. It was found to be selective for nickel over potassium and showed 99% removal efficiency for Ni.

Original languageEnglish
Pages (from-to)640-647
Number of pages8
JournalJournal of Hazardous Materials
Volume152
Issue number2
DOIs
Publication statusPublished - 1 Apr 2008
Externally publishedYes

Keywords

  • Heavy metal
  • Ion exchange
  • Iron-doped sodium nonatitanate
  • Sodium iron titanate
  • Waste water

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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