Due to the environmental problems derived from the use of common surfactants as modifiers for clay mineral adsorbents to mitigate mycotoxin contamination of animal feeds, finding non-toxic modifiers to prepare safe and efficient adsorbents is necessary. The objective of the present study was, therefore, to modify acidified palygorskite with polyhexamethylene biguanide (PHMB) to obtain antibacterial polyhexamethylene biguanide/palygorskite (PHMB/Plg) composites for the removal of zearalenone, a common mycotoxin. The PHMB/Plg composites were characterized and analyzed by X-ray diffraction, Fourier-transform infrared spectroscopy, field-emission scanning electron microscopy, and isothermal nitrogen adsorption analysis. The adsorption properties of the composites with respect to zearalenone and their antibacterial activity with respect to Escherichia coli and Staphylococcus aureus were studied. The results indicated that the hydrophobicity of palygorskite was enhanced after modification with PHMB, which could effectively improve the adsorption property of palygorskite toward the nonpolar zearalenone molecules. The adsorption capacity of PHMB/Plg increased with increasing amounts of polyhexamethylene biguanide and increasing pH. The adsorption data were described well by pseudo-second order kinetics and by the Langmuir adsorption model. The maximum adsorption capacity was 2777 μg/g. When the amount of PHMB added increased to 15 wt.%, the composites obtained exhibited good antibacterial performance, and the minimum inhibitory concentrations for Escherichia coli and Staphylococcus aureus were both at 2.5 mg/mL.

由于使用普通表面活性剂作为粘土矿物吸附剂的改性剂以减轻动物饲料的霉菌毒素污染所带来的环境问题，因此有必要寻找无毒的改性剂来制备安全有效的吸附剂。因此，本研究的目的是用聚六亚甲基双胍 (PHMB) 改性酸化坡缕石，以获得用于去除常见霉菌毒素玉米赤霉烯酮的抗菌聚六亚甲基双胍/坡缕石 (PHMB/Plg) 复合材料。通过 X 射线衍射、傅里叶变换红外光谱、场发射扫描电子显微镜和等温氮吸附分析对 PHMB/Plg 复合材料进行了表征和分析。复合材料对玉米赤霉烯酮的吸附性能及其抗菌活性研究了大肠杆菌和金黄色葡萄球菌。结果表明，PHMB修饰后坡缕石的疏水性增强，可有效提高坡缕石对非极性玉米赤霉烯酮分子的吸附性能。PHMB/Plg的吸附能力随着聚六亚甲基双胍用量的增加和pH的增加而增加。通过准二级动力学和朗缪尔吸附模型很好地描述了吸附数据。最大吸附容量为2777 μg/g。当PHMB的添加量增加到15 wt.%时，得到的复合材料表现出良好的抗菌性能，对大肠杆菌和金黄色葡萄球菌的抑菌浓度最低。均为 2.5 mg/mL。