Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Lihu Road 1800, Wuxi 214122, China; National Engineering Research Center of Cereal Fermentation and Food Biomanufacturing, Jiangnan University, Lihu Road 1800, Wuxi 214122, China; Jiangsu Provincial Engineering Research Center for Bioactive Product Processing, Jiangnan University, Lihu Road 1800, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi 214122, China.
School of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi 214122, China; Wuxi Zodolabs Biotech Co., Ltd, Yanxin Road 311, Wuxi 214174, China.
Food Chem. 2022 Sep 30;389:132987. doi: 10.1016/j.foodchem.2022.132987. Epub 2022 Apr 16.
It is urgent to solve the contamination of aflatoxin B (AFB) in food and water. In this study, the mesoporous silica was prepared from rice husk, which was then magnetized using the precipitation technique, followed by amino-modification with 3-aminopropyltriethoxysilane, forming amino-grafted magnetic mesoporous silica (NMMS). X-ray diffraction, Fourier transformed infrared spectra, and thermogravimetric analysis showed the successful grafting of amino groups on NMMS with a percentage of grafting up to 13.33%. The NMMS had an adsorption capacity of 169.88 μg/g and a removal rate of 93.43% for AFB in aqueous solutions at 20 °C, pH 7.0 for 2.0 h. The adsorption of AFB by NMMS followed a quasi-second-order kinetics and fitted well with the Langmuir model. Furthermore, the removal rate of AFB by NMMS remained 72.43% after repeating the adsorption-desorption process for five times. This study provided a facile approach to prepare NMMS for effective removal of AFB.
解决食品和水中黄曲霉毒素 B（AFB）的污染问题迫在眉睫。本研究以稻壳为原料制备中孔硅材料，采用沉淀法对其进行磁化，然后用 3-氨丙基三乙氧基硅烷进行氨基化改性，形成氨基接枝磁性介孔硅（NMMS）。X 射线衍射、傅里叶变换红外光谱和热重分析表明，氨基成功接枝到 NMMS 上，接枝率高达 13.33%。NMMS 在 20°C、pH 值为 7.0 的条件下，对水溶液中的 AFB 的吸附容量为 169.88μg/g，去除率为 93.43%，吸附时间为 2.0 h。AFB 对 NMMS 的吸附符合准二级动力学模型，并很好地符合 Langmuir 模型。此外，NMMS 在重复吸附-解吸 5 次后，对 AFB 的去除率仍保持在 72.43%。该研究为制备 NMMS 有效去除 AFB 提供了一种简便的方法。
