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.
Highlights
Mycotoxins are secondary metabolites of different fungi mainly belonging to Fusarium, Aspergillus, and Penicillium species
The amount of loaded surfactant depends on the cation exchange capacity (CEC) of clay minerals or external cation exchange capacity (ECEC) of zeolites [14, 18]
Kaolinite is a non-swelling clay and possess much lower CEC; lower amounts of surfactant are needed for modification of this mineral
Summary
Mycotoxins are secondary metabolites of different fungi mainly belonging to Fusarium, Aspergillus, and Penicillium species. The most frequently found mycotoxins in agricultural and food systems, include aflatoxins, ochratoxins, patulin, fumonisins, trichothecenes, and zearalenone. Zearalenone – a mycotoxin produced by fungi belonging to the Fusarium family, has attracted particular attention, because of its strong estrogenic activity. The chemical structure of zearalenone (Figure 1a) is similar. 39-45 to natural estrogens such as 17β-estradiol and, as a result, it can bind to estrogen receptors, disturbing the hormonal balance and leading to numerous diseases of the reproductive system [1, 2] Vol 25 (1) 2019 p. 39-45 to natural estrogens such as 17β-estradiol and, as a result, it can bind to estrogen receptors, disturbing the hormonal balance and leading to numerous diseases of the reproductive system [1, 2]
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