Advanced search
1 file | 1.16 MB Add to list

Calcination enhances the aflatoxin and zearalenone binding efficiency of a Tunisian clay

(2019) TOXINS. 11(10).
Author
Organization
Abstract
Clays are known to have promising adsorbing characteristics, and are used as feed additives to overcome the negative effects of mycotoxicosis in livestock farming. Modification of clay minerals by heat treatment, also called calcination, can alter their adsorption characteristics. Little information, however, is available on the effect of calcination with respect to mycotoxin binding. The purpose of this study was to characterize a Tunisian clay before and after calcination (at 550 degrees C), and to investigate the effectiveness of the thermal treatment of this clay on its aflatoxin B1 (AFB1), G1 (AFG1), B2 (AFB2), G2 (AFG2), and zearalenone (ZEN) adsorption capacity. Firstly, the purified clay (CP) and calcined clay (CC) were characterized with X-ray Fluorescence (XRF), X-ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR-IR), cation exchange capacity (CEC), specific surface area (S-BET), and point of zero charge (pH(PZC)) measurements. Secondly, an in vitro model that simulated the pH conditions of the monogastric gastrointestinal tract was used to evaluate the binding efficiency of the tested clays when artificially mixed with aflatoxins and zearalenone. The tested clay consisted mainly of smectite and illite. Purified and calcined clay had similar chemical compositions. After heat treatment, however, some changes in the mineralogical and textural properties were observed. The calcination decreased the cation exchange capacity and the specific surface, whereas the pore size was increased. Both purified and calcined clay had a binding efficacy of over 90% for AFB1 under simulated poultry GI tract conditions. Heat treatment of the clay increased the adsorption of AFB2, AFG1, and AFG2 related to the increase in pore size of the clay by the calcination process. ZEN adsorption also increased by calcination, albeit to a more stable level at pH 3 rather than at pH 7. In conclusion, calcination of clay minerals enhanced the adsorption of aflatoxins and mostly of AFG1 and AFG2 at neutral pH of the gastrointestinal tract, and thus are associated with protection against the toxic effects of aflatoxins.
Keywords
CATION-EXCHANGE CAPACITY, IN-VITRO, MODIFIED MONTMORILLONITE, MYCOTOXIN, BINDERS, MASS-SPECTROMETRY, LEAD REMOVAL, ZERO CHARGE, ANIMAL FEED, ADSORPTION, BENTONITE, aflatoxins, zearalenone, clay, purified, calcined, adsorption, pH

Downloads

  • toxins-11-00602.pdf
    • full text (Published version)
    • |
    • open access
    • |
    • PDF
    • |
    • 1.16 MB

Citation

Please use this url to cite or link to this publication:

MLA
Rejeb, Roua, et al. “Calcination Enhances the Aflatoxin and Zearalenone Binding Efficiency of a Tunisian Clay.” TOXINS, vol. 11, no. 10, 2019.
APA
Rejeb, R., Antonissen, G., De Boevre, M., Detavernier, C., Van de Velde, M., De Saeger, S., … Ghorbal, A. (2019). Calcination enhances the aflatoxin and zearalenone binding efficiency of a Tunisian clay. TOXINS, 11(10).
Chicago author-date
Rejeb, Roua, Gunther Antonissen, Marthe De Boevre, Christel Detavernier, Mario Van de Velde, Sarah De Saeger, Richard Ducatelle, Madiha Hadj Ayed, and Achraf Ghorbal. 2019. “Calcination Enhances the Aflatoxin and Zearalenone Binding Efficiency of a Tunisian Clay.” TOXINS 11 (10).
Chicago author-date (all authors)
Rejeb, Roua, Gunther Antonissen, Marthe De Boevre, Christel Detavernier, Mario Van de Velde, Sarah De Saeger, Richard Ducatelle, Madiha Hadj Ayed, and Achraf Ghorbal. 2019. “Calcination Enhances the Aflatoxin and Zearalenone Binding Efficiency of a Tunisian Clay.” TOXINS 11 (10).
Vancouver
1.
Rejeb R, Antonissen G, De Boevre M, Detavernier C, Van de Velde M, De Saeger S, et al. Calcination enhances the aflatoxin and zearalenone binding efficiency of a Tunisian clay. TOXINS. 2019;11(10).
IEEE
[1]
R. Rejeb et al., “Calcination enhances the aflatoxin and zearalenone binding efficiency of a Tunisian clay,” TOXINS, vol. 11, no. 10, 2019.
@article{8645152,
  abstract     = {Clays are known to have promising adsorbing characteristics, and are used as feed additives to overcome the negative effects of mycotoxicosis in livestock farming. Modification of clay minerals by heat treatment, also called calcination, can alter their adsorption characteristics. Little information, however, is available on the effect of calcination with respect to mycotoxin binding. The purpose of this study was to characterize a Tunisian clay before and after calcination (at 550 degrees C), and to investigate the effectiveness of the thermal treatment of this clay on its aflatoxin B1 (AFB1), G1 (AFG1), B2 (AFB2), G2 (AFG2), and zearalenone (ZEN) adsorption capacity. Firstly, the purified clay (CP) and calcined clay (CC) were characterized with X-ray Fluorescence (XRF), X-ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR-IR), cation exchange capacity (CEC), specific surface area (S-BET), and point of zero charge (pH(PZC)) measurements. Secondly, an in vitro model that simulated the pH conditions of the monogastric gastrointestinal tract was used to evaluate the binding efficiency of the tested clays when artificially mixed with aflatoxins and zearalenone. The tested clay consisted mainly of smectite and illite. Purified and calcined clay had similar chemical compositions. After heat treatment, however, some changes in the mineralogical and textural properties were observed. The calcination decreased the cation exchange capacity and the specific surface, whereas the pore size was increased. Both purified and calcined clay had a binding efficacy of over 90% for AFB1 under simulated poultry GI tract conditions. Heat treatment of the clay increased the adsorption of AFB2, AFG1, and AFG2 related to the increase in pore size of the clay by the calcination process. ZEN adsorption also increased by calcination, albeit to a more stable level at pH 3 rather than at pH 7. In conclusion, calcination of clay minerals enhanced the adsorption of aflatoxins and mostly of AFG1 and AFG2 at neutral pH of the gastrointestinal tract, and thus are associated with protection against the toxic effects of aflatoxins.},
  articleno    = {602},
  author       = {Rejeb, Roua and Antonissen, Gunther and De Boevre, Marthe and Detavernier, Christel and Van de Velde, Mario and De Saeger, Sarah and Ducatelle, Richard and Ayed, Madiha Hadj and Ghorbal, Achraf},
  issn         = {2072-6651},
  journal      = {TOXINS},
  keywords     = {CATION-EXCHANGE CAPACITY,IN-VITRO,MODIFIED MONTMORILLONITE,MYCOTOXIN,BINDERS,MASS-SPECTROMETRY,LEAD REMOVAL,ZERO CHARGE,ANIMAL FEED,ADSORPTION,BENTONITE,aflatoxins,zearalenone,clay,purified,calcined,adsorption,pH},
  language     = {eng},
  number       = {10},
  pages        = {14},
  title        = {Calcination enhances the aflatoxin and zearalenone binding efficiency of a Tunisian clay},
  url          = {http://dx.doi.org/10.3390/toxins11100602},
  volume       = {11},
  year         = {2019},
}

Altmetric
View in Altmetric
Web of Science
Times cited: