Magnetically-modified natural biogenic iron oxides for organic xenobiotics removal

I. Safarik, J. Filip, K. Horska, M. Nowakova, J. Tucek, M. Safarikova, H. Hashimoto, J. Takada, R. Zboril

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Biogenic iron oxides have been collected from a water stream and subsequently magnetically modified using water-based magnetic fluid. Both natural and magnetically modified materials have been characterized in detail using wavelength dispersive X-ray fluorescence spectrometry, X-ray powder diffraction, Mössbauer spectroscopy, electron microscopy and BET surface area measurements. The natural material is composed of 2-line ferrihydrite, forming hollow microtubules—sheaths of Leptothrix ochracea, and detrital components. As a result of the ferrofluid modification, maghemite nanoparticles were identified on the surface of the treated material. The active surface area of the bulk, magnetically-modified sample was 148 m2 g−1. The magnetically modified material was tested as inexpensive magnetically responsive adsorbent for the removal of selected organic xenobiotics, namely organic dyes, from aqueous solutions. The observed maximum adsorption capacities ranged between 34.3 and 97.8 mg of dye per 1 g of adsorbent.

Original languageEnglish
Pages (from-to)673-682
Number of pages10
JournalInternational Journal of Environmental Science and Technology
Volume12
Issue number2
DOIs
Publication statusPublished - Jan 1 2013

Keywords

  • Biogenic iron oxides
  • Leptothrix ochracea
  • Magnetic adsorbents
  • Magnetic fluid
  • Xenobiotics

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Agricultural and Biological Sciences(all)

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  • Cite this

    Safarik, I., Filip, J., Horska, K., Nowakova, M., Tucek, J., Safarikova, M., Hashimoto, H., Takada, J., & Zboril, R. (2013). Magnetically-modified natural biogenic iron oxides for organic xenobiotics removal. International Journal of Environmental Science and Technology, 12(2), 673-682. https://doi.org/10.1007/s13762-013-0455-1