Potential of Kale and Lettuce Residues as Natural Adsorbents of the Carcinogen Aflatoxin B<sub>1</sub> in a Dynamic Gastrointestinal Tract-Simulated Model
Adsorption of the carcinogen aflatoxin B<sub>1</sub> (AFB<sub>1</sub>) onto agro-waste-based materials is a promising alternative over conventional inorganic binders. In the current study, two unmodified adsorbents were eco-friendly prepared from kale and lettuce agro-wastes....
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| Auteurs principaux: | , , , , , , |
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| Format: | article |
| Langue: | EN |
| Publié: |
MDPI AG
2021
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| Accès en ligne: | https://doaj.org/article/f07429cd09fb44fd9d6cf50d1e370200 |
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| Résumé: | Adsorption of the carcinogen aflatoxin B<sub>1</sub> (AFB<sub>1</sub>) onto agro-waste-based materials is a promising alternative over conventional inorganic binders. In the current study, two unmodified adsorbents were eco-friendly prepared from kale and lettuce agro-wastes. A dynamic gastrointestinal tract-simulated model was utilized to evaluate the removal efficiency of the sorptive materials (0.5%, <i>w/w</i>) when added to an AFB<sub>1</sub>-contaminated diet (100 µg AFB<sub>1</sub>/kg). Different characterization methodologies were employed to understand the interaction mechanisms between the AFB<sub>1</sub> molecule and the biosorbents. Based on adsorption results, the biosorbent prepared from kale was the best; its maximum adsorption capacity was 93.6%, which was significantly higher than that of the lettuce biosorbent (83.7%). Characterization results indicate that different mechanisms may act simultaneously during adsorption. Non-electrostatic (hydrophobic interactions, dipole-dipole interactions, and hydrogen bonding) and electrostatic interactions (ionic attractions) together with the formation of AFB<sub>1</sub>-chlorophyll complexes appear to be the major influencing factors driving AFB<sub>1</sub> biosorption. |
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