Zearalenone and ochratoxin A: adsorption by kaolin modified with surfactant

  • Milica P. Spasojević Institute for Technology of Nuclear and Other Mineral Raw Materials, Franchet d`Esperey 86, 11000 Belgrade, Serbia
  • Aleksandra Dakovic Institute for Technology of Nuclear and Other Mineral Raw Materials, Franchet d`Esperey 86, 11000 Belgrade, Serbia
  • George E. Rottinghaus Veterinary Medical Diagnostic Laboratory, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211,USA
  • Ana S. Radosavljević Mihajlović Institute for Technology of Nuclear and Other Mineral Raw Materials, Franchet d`Esperey 86, 11000 Belgrade, Serbia
  • Marija A. Marković Institute for Technology of Nuclear and Other Mineral Raw Materials, Franchet d`Esperey 86, 11000 Belgrade, Serbia
  • Danina R. Krajišnik Department of Pharmaceutical Technology and Cosmetology, University of Belgrade, Faculty of Pharmacy, Vojvode Stepe 450, 11000 Belgrade, Serbia
Keywords: mycotoxins, kaolin, surfactants, adsorption

Abstract

Octadecyldimethylbenzyl ammonium chloride (OA) was used as a surfactant for the preparation of organokaolin. The natural kaolin (from a plant for production of quartz sand in Rgotina, Serbia) was modified with a surfactant in amount equal to 90% of the kaolin cation exchange capacity (CEC). FTIR spectroscopy was used for characterization of the new product. FTIR spectra confirmed the presence of OA ions at the kaolin surface. Adsorption of mycotoxins – zearalenone (ZEN) and ochratoxin A (OCHRA) was studied by organokaolin at different amounts of adsorbent and pHs. Results showed that the presence of organic cations in the kaolin structure increased adsorption of both ZEN and OCHRA. Adsorption of the mycotoxins by organokaolin increased with increasing amounts of adsorbent and, at the lowest amount of solids in suspension, adsorption of ZEN and OCHRA was slightly higher at pH 7 and 9.

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Published
2019-03-31
Section
Research