TY  - JOUR
AU  - Daković, Aleksandra
AU  - Tomašević-Čanović, Magdalena
AU  - Dondur, Vera
AU  - Rottinghaus, George E.
AU  - Medaković, V
AU  - Zarić, Snežana
PY  - 2005
UR  - https://ritnms.itnms.ac.rs/handle/123456789/81
AB  - Adsorption of zearalenone (ZEN), ochratoxin A (OCHRA) and aflatoxin B1 (AFB1) on natural zeolite, clinoptilolite, modified with different amounts of octadecyldimethylbenzyl ammonium (ODMBA) ions was investigated. Results showed that adsorption of hydrophobic ionizable ZEN on unmodified zeolite tuff was very low and that adsorption on organozeolites increased with increasing hydrophobicity of the zeolitic surface. The adsorption was independent of the form of ZEN in solution and the solution pH, indicating that hydrophobic interactions with ODMBA are responsible for ZEN adsorption. Adsorption of low polar ionizable OCHRA on organozeolites also increased with increasing hydrophobicity of the zeolitic surface, however, OCHRA showed moderate adsorption on unmodified zeolitic tuff at pH 3. OCHRA adsorption on unmodified zeolite as well as on lower surface coverage of organozeolite was dependent on the form of OCHRA in solution; there was a decrease of adsorption at high pH, where OCHRA is in the anionic form. It indicated that at acidic pH, low surface coverage allows some combination of hydrophobic interaction with ODMBA and interactions with the surface of the zeolite. At higher surface coverage, the OCHRA adsorption was higher and practically independent of pH, indicating that the hydrophobic interactions of OCHRA with ODMBA are responsible for its adsorption. Nonionizable low polar AFB1 had a high affinity for the unmodified zeolitic tuff and the adsorption of AFB1 was greatly reduced for organozeolites, indicating that AFB1 does not have high tendency for hydrophobic interactions with ODMBA. pH dependence of AFB1 adsorption, while AFB1 has the same form at all pHs, demonstrated that the surface modification of the zeolite depends on pH and that these modifications have influence on its adsorption. The calculated dipole moments of neutral mycotoxin molecules: AFB1-9.5D, OCHRA-6.9D and ZEN-2.2D are in qualitative agreement with adsorption experimental data.
PB  - Elsevier, Amsterdam
T2  - Colloids and Surfaces B-Biointerfaces
T1  - Adsorption of mycotoxins by organozeolites
EP  - 25
IS  - 1
SP  - 20
VL  - 46
DO  - 10.1016/j.colsurfb.2005.08.013
UR  - conv_506
ER  - 

@article{
author = "Daković, Aleksandra and Tomašević-Čanović, Magdalena and Dondur, Vera and Rottinghaus, George E. and Medaković, V and Zarić, Snežana",
year = "2005",
abstract = "Adsorption of zearalenone (ZEN), ochratoxin A (OCHRA) and aflatoxin B1 (AFB1) on natural zeolite, clinoptilolite, modified with different amounts of octadecyldimethylbenzyl ammonium (ODMBA) ions was investigated. Results showed that adsorption of hydrophobic ionizable ZEN on unmodified zeolite tuff was very low and that adsorption on organozeolites increased with increasing hydrophobicity of the zeolitic surface. The adsorption was independent of the form of ZEN in solution and the solution pH, indicating that hydrophobic interactions with ODMBA are responsible for ZEN adsorption. Adsorption of low polar ionizable OCHRA on organozeolites also increased with increasing hydrophobicity of the zeolitic surface, however, OCHRA showed moderate adsorption on unmodified zeolitic tuff at pH 3. OCHRA adsorption on unmodified zeolite as well as on lower surface coverage of organozeolite was dependent on the form of OCHRA in solution; there was a decrease of adsorption at high pH, where OCHRA is in the anionic form. It indicated that at acidic pH, low surface coverage allows some combination of hydrophobic interaction with ODMBA and interactions with the surface of the zeolite. At higher surface coverage, the OCHRA adsorption was higher and practically independent of pH, indicating that the hydrophobic interactions of OCHRA with ODMBA are responsible for its adsorption. Nonionizable low polar AFB1 had a high affinity for the unmodified zeolitic tuff and the adsorption of AFB1 was greatly reduced for organozeolites, indicating that AFB1 does not have high tendency for hydrophobic interactions with ODMBA. pH dependence of AFB1 adsorption, while AFB1 has the same form at all pHs, demonstrated that the surface modification of the zeolite depends on pH and that these modifications have influence on its adsorption. The calculated dipole moments of neutral mycotoxin molecules: AFB1-9.5D, OCHRA-6.9D and ZEN-2.2D are in qualitative agreement with adsorption experimental data.",
publisher = "Elsevier, Amsterdam",
journal = "Colloids and Surfaces B-Biointerfaces",
title = "Adsorption of mycotoxins by organozeolites",
pages = "25-20",
number = "1",
volume = "46",
doi = "10.1016/j.colsurfb.2005.08.013",
url = "conv_506"
}

Daković, A., Tomašević-Čanović, M., Dondur, V., Rottinghaus, G. E., Medaković, V.,& Zarić, S.. (2005). Adsorption of mycotoxins by organozeolites. in Colloids and Surfaces B-Biointerfaces
Elsevier, Amsterdam., 46(1), 20-25.
https://doi.org/10.1016/j.colsurfb.2005.08.013
conv_506

Daković A, Tomašević-Čanović M, Dondur V, Rottinghaus GE, Medaković V, Zarić S. Adsorption of mycotoxins by organozeolites. in Colloids and Surfaces B-Biointerfaces. 2005;46(1):20-25.
doi:10.1016/j.colsurfb.2005.08.013
conv_506 .

Daković, Aleksandra, Tomašević-Čanović, Magdalena, Dondur, Vera, Rottinghaus, George E., Medaković, V, Zarić, Snežana, "Adsorption of mycotoxins by organozeolites" in Colloids and Surfaces B-Biointerfaces, 46, no. 1 (2005):20-25,
https://doi.org/10.1016/j.colsurfb.2005.08.013 .,
conv_506 .