Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China.
National Engineering Research Center of Cereal Fermentation and Food Biomanufacturing, Jiangnan University, Wuxi 214122, China.
Toxins (Basel). 2022 Jan 23;14(2):87. doi: 10.3390/toxins14020087.
Edible oils, especially peanut oil, usually contain aflatoxin B (AFB) at extremely high concentrations. This study focused on the synthesis of rice husk-based mesoporous silica (MCM-41) for the removal of AFB from peanut oil. MCM-41 was characterized by X-ray diffraction, N physisorption, and transmission electron microscope. MCM-41 was shown to have ordered channels with high specific surface area (1246 m/g), pore volume (1.75 cm/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 AFB were compared. The adsorption of AFB in peanut oil onto the three adsorbents was slower compared to that of AFB in an aqueous solution. In addition, the pseudo-second-order kinetic model better fit the adsorption kinetics of AFB while the adsorption mechanism followed the Langmuir adsorption isotherm on the three adsorbents. The calculated maximum adsorbed amounts of AFB 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 AFB from peanut oil. This study provides insights that could prove to be of economic and practical value.
食用油，特别是花生油，通常含有极高浓度的黄曲霉毒素 B（AFB）。本研究专注于合成基于稻壳的中孔硅 MCM-41，以去除花生油中的 AFB。通过 X 射线衍射、N 物理吸附和透射电子显微镜对 MCM-41 进行了表征。MCM-41 具有有序的通道，具有高比表面积（1246 m/g）、孔体积（1.75 cm/g）和孔径（3.11nm）。在吸附剂剂量为 1.0mg/mL 的最佳浓度下，比较了 MCM-41、天然蒙脱石（MONT）和商业活性炭（CA）对 AFB 的吸附行为。与 AFB 在水溶液中的吸附相比，花生油中 AFB 的吸附速度较慢。此外，准二级动力学模型更好地拟合了 AFB 的吸附动力学，而吸附机制遵循三种吸附剂上的 Langmuir 吸附等温线。MONT、MCM-41 和 CA 对 AFB 的最大吸附量分别为 199.41、215.93 和 248.93ng/mg。这些结果表明，未经修饰的 MCM-41 可以满足市场需求，是从花生油中去除 AFB 的良好候选材料。本研究提供了具有经济和实用价值的见解。
