Abstract
Edible oils, especially peanut oil, usually contain aflatoxin B1 (AFB1) at extremely high concentrations. This study focused on the synthesis of rice husk-based mesoporous silica (MCM-41) for the removal of AFB1 from peanut oil. MCM-41 was characterized by X-ray diffraction, N2 physisorption, and transmission electron microscope. MCM-41 was shown to have ordered channels with high specific surface area (1246 m2/g), pore volume (1.75 cm3/g), and pore diameter (3.11 nm). Under the optimal concentration of 1.0 mg/mL of the adsorbent dose, the adsorption behavior of MCM-41, natural montmorillonite (MONT), and commercial activated carbon (CA) for AFB1 were compared. The adsorption of AFB1 in peanut oil onto the three adsorbents was slower compared to that of AFB1 in an aqueous solution. In addition, the pseudo-second-order kinetic model better fit the adsorption kinetics of AFB1, while the adsorption mechanism followed the Langmuir adsorption isotherm on the three adsorbents. The calculated maximum adsorbed amounts of AFB1 on MONT, MCM-41, and CA were 199.41, 215.93, and 248.93 ng/mg, respectively. These results suggested that MCM-41 without modification could meet market demand and could be considered a good candidate for the removal of AFB1 from peanut oil. This study provides insights that could prove to be of economic and practical value.
Highlights
Introduction conditions of the Creative CommonsAflatoxin B1 (AFB1 ), which contaminated peanut, corn, sorghum, oilseed, animal feed, and foods, was a secondary metabolite produced by Aspergillus flavus and Aspergillus parasiticus
The calculated equilibrium adsorption capacity qe provided by the pseudo-second-order model was closer to qe than that calculated with the pseudofirst-order model
These results indicated that the pseudo-second-order kinetic model was more suitable in explaining the adsorption kinetics of aflatoxin B1 (AFB1) by three adsorbents
Summary
Aflatoxin B1 (AFB1 ), which contaminated peanut, corn, sorghum, oilseed, animal feed, and foods, was a secondary metabolite produced by Aspergillus flavus and Aspergillus parasiticus. To reduce the risk of AFB1 contamination, several approaches for the detoxification of peanut oil have been proposed, including chemical (alkali [4] and ozone [5] treatments), biological (microbial adsorption and degradation [6]), and physical methods (UV irradiation [7,8], photocatalysis [9], and adsorption [10]). Alkali treatment and adsorption were the most commonly used methods for the detoxification of peanut oil. In this study, we aimed to investigate the mechanism and performance of rice husk-based MCM-41 in the detoxification of peanut oil from AFB1. This study provided insights into novel ways to use rice husk to improve food safety It proposed the basis for a convenient detoxification technology with potential application in the grain and oil processing industry
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
