The effect of bentonite on AFB1, AFB2, AFG2 and T-2 mycotoxins decomposition in sunflower oil under the irradiation of ultraviolet light

Gombos Sándor, Paul Şerban Agachi

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    Bentonite was used as a photocatalyst in the degradation of mycotoxins in sunflower oil, under UV-illumination. The objective of this study was to investigate and evaluate the efficiency of bentonite adding to sunflower oil to decompose the solubilised B1, B2, G2 aflatoxins and T-2 toxin by UV light irradiating, as solution to increase vegetable oil quality. Identification of decontaminating process particularities consists in the formulation of mathematical model which describes the influence of process parameters on the decomposition of mycotoxins. In the present work, decontamination process was studied at laboratory scale using a plug-flow photoreactor, serial connected with a buffer vessel, at constant operating temperature and irradiating time. The kinetics of photocatalytic process was assumed to follow a pseudo-first-order rate law. The apparent photodegradation rate constant depend strongly on the present mycotoxin, the bentonite catalyst contribute to obtain much lower mycotoxin concentrations. The model predicted maximum values of apparent photodegradation constants were compared with the experimental data, the model was verified.

    Original languageEnglish
    Pages (from-to)249-259
    Number of pages11
    JournalStudia Universitatis Babes-Bolyai Chemia
    Issue number1
    Publication statusPublished - 2011

    Fingerprint

    Bentonite
    Mycotoxins
    Irradiation
    Decomposition
    Photodegradation
    T-2 Toxin
    Plant Oils
    Decontamination
    Photocatalysts
    Ultraviolet radiation
    Rate constants
    Buffers
    Lighting
    Mathematical models
    Degradation
    Catalysts
    Kinetics
    sunflower seed oil
    Ultraviolet Rays
    Temperature

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)

    Cite this

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    abstract = "Bentonite was used as a photocatalyst in the degradation of mycotoxins in sunflower oil, under UV-illumination. The objective of this study was to investigate and evaluate the efficiency of bentonite adding to sunflower oil to decompose the solubilised B1, B2, G2 aflatoxins and T-2 toxin by UV light irradiating, as solution to increase vegetable oil quality. Identification of decontaminating process particularities consists in the formulation of mathematical model which describes the influence of process parameters on the decomposition of mycotoxins. In the present work, decontamination process was studied at laboratory scale using a plug-flow photoreactor, serial connected with a buffer vessel, at constant operating temperature and irradiating time. The kinetics of photocatalytic process was assumed to follow a pseudo-first-order rate law. The apparent photodegradation rate constant depend strongly on the present mycotoxin, the bentonite catalyst contribute to obtain much lower mycotoxin concentrations. The model predicted maximum values of apparent photodegradation constants were compared with the experimental data, the model was verified.",
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