Montmorillonitin Aflatoksin B1’e Karşı Absorbe Kabiliyeti

Bu çalışmada ise, B1 Aflatoksininin doğal ve Bakır ile modifiye edilmiş Montmorillonit ile absorbe edilmesi araştırılmıştır. Yapılan ölçümlerde

Montmorillonitin Aflatoksin B1 emme miktarı 40,982 mg/g, Bakır ile Modifiye edilmiş Montmorillonitin ise emme miktarı 66,225 mg/g. olarak bulunmuştur. Bu sonuçlar ile birlikte Montmorillonitin Aflatoksine karşı etkisinin Bakır ile Modifiye edilerek arttırılabildiği gösterilmiştir.

Çalışmanın İngilizce özetine aşağıda yer verilmiştir;

Aflatoxin B(1) Adsorption By Natural And Copper Modified Montmorillonite Daković A, Matijasević S, Rottinghaus GE, Ledoux DR, Butkeraitis P, Sekulić Z. Institute for Technology of Nuclear and Other Mineral Raw Materials, 11 000 Belgrade, Serbia PMID: 18585010 [PUBMED – indexed for MEDLINE] Colloids Surf B Biointerfaces. 2008 Oct 1;66(1):20-5 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 (40.982mg/g) and Cu-MONT (66.225mg/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.