Chitosan (CTS) modified montmorillonite (Mnt) composites (CTS-Mnt), which have been widely reported for the adsorption of heavy-metal ions and biological dyes, have not been applied to the field of mycotoxin adsorption. The current study was focused on the preparation of CTS-Mnt by calcination as a mycotoxin adsorbent for the efficient removal of aflatoxin B1 (AFB1). The CTS-Mnt samples obtained were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and nitrogen adsorption/desorption analysis. The CTS-Mnt samples prepared at various calcination temperatures exhibited varying structural configurations, surface hydrophobicities, and texture properties. The results revealed that stable CTS-Mnt speciments, obtained at <350°C, displayed superior adsorption capacity for AFB1 from a simulated gastrointestinal tract, increasing from 0.51 mg/g of raw Mnt to 4.97 mg/g. With increased calcination temperature, the effect of pH on the adsorption process of AFB1 becomes negligible. This study demonstrates that the novel CTS-Mnt has tremendous potential as an AFB1 adsorbent.

中文翻译：

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煅烧温度对壳聚糖改性蒙脱石结构及其对黄曲霉毒素B1吸附的影响

壳聚糖 (CTS) 改性蒙脱石 (Mnt) 复合材料 (CTS-Mnt) 已被广泛报道用于吸附重金属离子和生物染料，但尚未应用于霉菌毒素吸附领域。目前的研究重点是通过煅烧制备 CTS-Mnt 作为真菌毒素吸附剂，以有效去除黄曲霉毒素 B1 (AFB1)。使用 X 射线衍射 (XRD)、傅里叶变换红外光谱 (FTIR)、扫描电子显微镜 (SEM) 和氮吸附/解吸分析对获得的 CTS-Mnt 样品进行表征。在不同煅烧温度下制备的 CTS-Mnt 样品表现出不同的结构配置、表面疏水性和质地特性。结果表明，在 <350°C 下获得的稳定 CTS-Mnt 试样，对来自模拟胃肠道的 AFB1 显示出优异的吸附能力，从原始 Mnt 的 0.51 mg/g 增加到 4.97 mg/g。随着煅烧温度的升高，pH对AFB1吸附过程的影响变得可以忽略不计。这项研究表明，新型 CTS-Mnt 作为 AFB1 吸附剂具有巨大的潜力。