In this study, triethylene tetramine-modified water-insoluble corn flour caged in magnetic chitosan resin (TETA-WICF/MCR) was firstly prepared, which indicates novel aspects for immobilization and chemically modification of mycotoxin adsorbents. The TETA-WICF/MCR was characterized using zoom stereo microscope, scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffractometer (XRD), and magnetic separation performance analysis. Experimental results confirmed successful layer by layer modification of chitosan, biosorbent water-insoluble corn flour (WICF), TETA onto the surface of magnetic beads. The mean diameter of the TETA-WICF/MCR was 2.63 mm with good magnetic-responsive ability. Subsequently, the adsorption performance of the TETA-WICF/MCR obtained toward patulin was assessed in batch adsorption system and the results demonstrated that the adsorption process was strongly depended on adsorbent dosage, contact time, temperature, and initial patulin concentration. The results of SEM images and FTIR analysis showed obvious changes in the porous structure of TETA-WICF/MCR after adsorbing patulin, and -NH2 and -OH groups were predominantly involved in the adsorption of patulin. Furthermore, the adsorption kinetics followed the mechanism of pseudo-second-order model, and equilibrium data were well fitted in the Freundlich isotherm model. It was also found that the TETA-WICF/MCR had good reusability without any adverse changes in apple juice. PRACTICAL APPLICATION: Patulin is a regulated toxin biosynthesized by certain fungi that contaminate agricultural commodities, such as fruits, juices, and other beverages. Several approaches have been studied to reduce patulin levels in apple juice and other aqueous systems. There is need for more low-cost and eco-friendly adsorbent capable of detoxifying patulin contaminated. In this sense, triethylene tetramine-modified water-insoluble corn flour caged in magnetic chitosan resin (TETA-WICF/MCR) was first prepared and exhibits easy solid-liquid separation and high adsorption capacity for removing patulin from contaminated apple juice.

中文翻译：

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磁性壳聚糖树脂包覆三亚乙基四胺改性水不溶性玉米粉的合成及其吸附去除苹果汁中展青霉素的应用

在本研究中，首次制备了磁性壳聚糖树脂笼罩的三亚乙基四胺改性的水不溶性玉米粉（TETA-WICF/MCR），这为真菌毒素吸附剂的固定化和化学改性指明了新的方向。使用变焦立体显微镜、扫描电子显微镜 (SEM)、傅里叶变换红外 (FTIR) 光谱、X 射线衍射仪 (XRD) 和磁分离性能分析对 TETA-WICF/MCR 进行表征。实验结果证实壳聚糖、生物吸附剂水不溶性玉米粉 (WICF)、TETA 成功地逐层改性到磁珠表面。TETA-WICF/MCR 的平均直径为 2.63 mm，具有良好的磁响应能力。随后，在批量吸附系统中评估了 TETA-WICF/MCR 对棒曲霉素的吸附性能，结果表明吸附过程强烈依赖于吸附剂剂量、接触时间、温度和初始棒曲霉素浓度。SEM图像和FTIR分析结果表明，TETA-WICF/MCR吸附棒曲霉素后多孔结构发生明显变化，其中-NH2和-OH基团主要参与了棒曲霉素的吸附。此外，吸附动力学遵循拟二级模型的机制，平衡数据很好地拟合了 Freundlich 等温线模型。还发现 TETA-WICF/MCR 具有良好的可重复使用性，而苹果汁没有任何不利变化。实际应用：展青霉素是一种受管制的毒素，由某些污染农产品（如水果、果汁和其他饮料）的真菌生物合成。已经研究了几种方法来降低苹果汁和其他水性系统中的展青霉素水平。需要能够解毒棒曲霉素污染的更低成本和环保的吸附剂。从这个意义上说，首先制备了包裹在磁性壳聚糖树脂中的三亚乙基四胺改性的水不溶性玉米粉（TETA-WICF/MCR），该玉米粉表现出易于固液分离和高吸附能力从受污染的苹果汁中去除展青霉素。需要能够解毒棒曲霉素污染的更低成本和环保的吸附剂。从这个意义上说，首先制备了包裹在磁性壳聚糖树脂中的三亚乙基四胺改性的水不溶性玉米粉（TETA-WICF/MCR），该玉米粉表现出易于固液分离和高吸附能力从受污染的苹果汁中去除展青霉素。需要能够解毒棒曲霉素污染的更低成本和环保的吸附剂。从这个意义上说，首先制备了包裹在磁性壳聚糖树脂中的三亚乙基四胺改性的水不溶性玉米粉（TETA-WICF/MCR），该玉米粉表现出易于固液分离和高吸附能力从受污染的苹果汁中去除展青霉素。