Adsorption of aflatoxin B-1 (AFB1) by natural montmorillonite (MONT) and montmorillonite modified with copper ions (Cu-MONT) was investigated. Both MONTs were characterized using the X-ray powder diffraction (XRPD) analysis, thermal analysis (DTA/TGA) and scanning electron miscroscopy/electron dispersive spectroscopy (SEM/EDS). The results of XRPD and SEM/EDS analyses of Cu-MONT suggested partial ion exchange of native inorganic cations in MONT with copper occurred. Investigation of AFB1 adsorption by MONT and Cu-MONT, at pH 3, 7 or 9, showed that adsorption of this toxin by both MONTs was high (over 93%). Since AFB1 is nonionizable, no differences in AFB1 adsorption by both MONTs, at different pHs, were observed, as expected. Futhermore, it was determined that adsorption of AFB1 by both MONTs followed a non-linear (Langmuir) type of isotherm, at pH 3. The calculated maximum adsorbed amounts of AFB1 by MONT (40.982 mg/g) and Cu-MONT (66.225 mg/g), derived from Langmuir plots of isother...ms, indicate that Cu-MONT was much effective in adsorbing AFB1. Since, the main cation in an exchangeable position in MONT is calcium, and in Cu-MONT both calcium and copper, the fact that ion exchange of inorganic cations in MONT with copper increases adsorption of AFB1 suggests that additional interactions between AFB1 and copper ions in Cu-MONT caused greater adsorption.
TY - JOUR
AU - Daković, Aleksandra
AU - Matijašević, Srđan
AU - Rottinghaus, George E.
AU - Ledoux, David R.
AU - Butkeraitis, Paula
AU - Sekulić, Živko
PY - 2008
UR - https://ritnms.itnms.ac.rs/handle/123456789/131
AB - Adsorption of aflatoxin B-1 (AFB1) by natural montmorillonite (MONT) and montmorillonite modified with copper ions (Cu-MONT) was investigated. Both MONTs were characterized using the X-ray powder diffraction (XRPD) analysis, thermal analysis (DTA/TGA) and scanning electron miscroscopy/electron dispersive spectroscopy (SEM/EDS). The results of XRPD and SEM/EDS analyses of Cu-MONT suggested partial ion exchange of native inorganic cations in MONT with copper occurred. Investigation of AFB1 adsorption by MONT and Cu-MONT, at pH 3, 7 or 9, showed that adsorption of this toxin by both MONTs was high (over 93%). Since AFB1 is nonionizable, no differences in AFB1 adsorption by both MONTs, at different pHs, were observed, as expected. Futhermore, it was determined that adsorption of AFB1 by both MONTs followed a non-linear (Langmuir) type of isotherm, at pH 3. The calculated maximum adsorbed amounts of AFB1 by MONT (40.982 mg/g) and Cu-MONT (66.225 mg/g), derived from Langmuir plots of isotherms, indicate that Cu-MONT was much effective in adsorbing AFB1. Since, the main cation in an exchangeable position in MONT is calcium, and in Cu-MONT both calcium and copper, the fact that ion exchange of inorganic cations in MONT with copper increases adsorption of AFB1 suggests that additional interactions between AFB1 and copper ions in Cu-MONT caused greater adsorption.
PB - Elsevier, Amsterdam
T2 - Colloids and Surfaces B-Biointerfaces
T1 - Aflatoxin B-1 adsorption by natural and copper modified montmorillonite
EP - 25
IS - 1
SP - 20
VL - 66
DO - 10.1016/j.colsurfb.2008.05.008
UR - conv_550
ER -
@article{
author = "Daković, Aleksandra and Matijašević, Srđan and Rottinghaus, George E. and Ledoux, David R. and Butkeraitis, Paula and Sekulić, Živko",
year = "2008",
abstract = "Adsorption of aflatoxin B-1 (AFB1) by natural montmorillonite (MONT) and montmorillonite modified with copper ions (Cu-MONT) was investigated. Both MONTs were characterized using the X-ray powder diffraction (XRPD) analysis, thermal analysis (DTA/TGA) and scanning electron miscroscopy/electron dispersive spectroscopy (SEM/EDS). The results of XRPD and SEM/EDS analyses of Cu-MONT suggested partial ion exchange of native inorganic cations in MONT with copper occurred. Investigation of AFB1 adsorption by MONT and Cu-MONT, at pH 3, 7 or 9, showed that adsorption of this toxin by both MONTs was high (over 93%). Since AFB1 is nonionizable, no differences in AFB1 adsorption by both MONTs, at different pHs, were observed, as expected. Futhermore, it was determined that adsorption of AFB1 by both MONTs followed a non-linear (Langmuir) type of isotherm, at pH 3. The calculated maximum adsorbed amounts of AFB1 by MONT (40.982 mg/g) and Cu-MONT (66.225 mg/g), derived from Langmuir plots of isotherms, indicate that Cu-MONT was much effective in adsorbing AFB1. Since, the main cation in an exchangeable position in MONT is calcium, and in Cu-MONT both calcium and copper, the fact that ion exchange of inorganic cations in MONT with copper increases adsorption of AFB1 suggests that additional interactions between AFB1 and copper ions in Cu-MONT caused greater adsorption.",
publisher = "Elsevier, Amsterdam",
journal = "Colloids and Surfaces B-Biointerfaces",
title = "Aflatoxin B-1 adsorption by natural and copper modified montmorillonite",
pages = "25-20",
number = "1",
volume = "66",
doi = "10.1016/j.colsurfb.2008.05.008",
url = "conv_550"
}
Daković, A., Matijašević, S., Rottinghaus, G. E., Ledoux, D. R., Butkeraitis, P.,& Sekulić, Ž.. (2008). Aflatoxin B-1 adsorption by natural and copper modified montmorillonite. in Colloids and Surfaces B-Biointerfaces
Elsevier, Amsterdam., 66(1), 20-25.
https://doi.org/10.1016/j.colsurfb.2008.05.008
conv_550
Daković A, Matijašević S, Rottinghaus GE, Ledoux DR, Butkeraitis P, Sekulić Ž. Aflatoxin B-1 adsorption by natural and copper modified montmorillonite. in Colloids and Surfaces B-Biointerfaces. 2008;66(1):20-25.
doi:10.1016/j.colsurfb.2008.05.008
conv_550 .
Daković, Aleksandra, Matijašević, Srđan, Rottinghaus, George E., Ledoux, David R., Butkeraitis, Paula, Sekulić, Živko, "Aflatoxin B-1 adsorption by natural and copper modified montmorillonite" in Colloids and Surfaces B-Biointerfaces, 66, no. 1 (2008):20-25,
https://doi.org/10.1016/j.colsurfb.2008.05.008 .,
conv_550 .
