Xin Xueyan, Nan Mina, Bi Yang, Xue Huali, Lyu Liang, Jiang Daiwei, Chen Hongjuan, Luo Qifang
College of Science, Gansu Agricultural University, Lanzhou 730070, China.
Basic Experiment Teaching Center, Gansu Agricultural University, Lanzhou 730070, China.
Foods. 2025 Feb 15;14(4):666. doi: 10.3390/foods14040666.
Ochratoxin A (OTA) exposure in food is very dangerous to human health. Therefore, the development of a fast and efficient technique for OTA removal has become an urgent research topic in the field of food safety. Nano FeO modified chitosan nanocomposite (nano-FeO@CTS) was synthesized as a rapidly separable and safe adsorbent and was used to adsorb OTA in wine. FT-IR, XRD, and VSM characterization methods indicated that chitosan was successfully modified by FeO and exhibited good magnetism. The adsorption and kinetics isotherms between OTA and nano-FeO@CTS were studied by the Langmuir equation and the pseudo-second order kinetics equation. The mechanism of OTA adsorption on nano-FeO@CTS nanoparticles was the combined effect of physical adsorption and chemisorption. The negative , and values proved that the adsorption was a spontaneous and exothermic process. Nano-FeO@CTS with a high maximum adsorption capacity of 5018.07 ng/g at 25 °C can rapidly separate the matrix immobilized OTA from wine, and to a certain extent retains some of the wine quality after OTA removal.
食品中赭曲霉毒素A（OTA）的暴露对人体健康非常危险。因此，开发一种快速高效的OTA去除技术已成为食品安全领域亟待研究的课题。合成了纳米FeO修饰的壳聚糖纳米复合材料（nano-FeO@CTS）作为一种可快速分离的安全吸附剂，并用于吸附葡萄酒中的OTA。傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）和振动样品磁强计（VSM）表征方法表明壳聚糖已成功被FeO修饰并表现出良好的磁性。通过朗缪尔方程和伪二级动力学方程研究了OTA与nano-FeO@CTS之间的吸附及动力学等温线。OTA在nano-FeO@CTS纳米颗粒上的吸附机制是物理吸附和化学吸附的综合作用。负的 、 和 值证明吸附是一个自发的放热过程。在25℃下最大吸附容量高达5018.07 ng/g的nano-FeO@CTS能够快速从葡萄酒中分离出基质固定的OTA，并且在去除OTA后在一定程度上保留了部分葡萄酒品质。
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