School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China; School of Earth, Environmental and Biological Sciences, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia.
School of Earth, Environmental and Biological Sciences, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia.
J Hazard Mater. 2019 Feb 15;364:227-237. doi: 10.1016/j.jhazmat.2018.09.071. Epub 2018 Oct 17.
The current research focuses on the development of novel mycotoxins adsorbents using zwitterionic surfactants modified montmorillonites (ZMts) for simultaneous removal of highly health-hazardous polar aflatoxin B (AFB) and low polar zearalenone (ZER). Two types of ZMts including dodecyl dimethyl betaine (BS-12) and lauramidopropyl betaine (LAB-35) modified montmorillonites (BS-12/Mts and LAB-35/Mts) were fabricated, and the structural, interfacial and textural features of which were explored by different techniques. It is indicated that ZMts have different structural configurations based on the surfactant type and loadings, convert from hydrophilic to hydrophobic property, with a mesoporous network inherited from Mt. The resultant adsorbents show significant improvements on the detoxification efficiency of both AFB and ZER. pH has little effect on the adsorption of ZMts, suggesting no desorption happens. The adsorption mechanisms of raw Mt, BS-12/Mts and LAB-35/Mts to AFB and ZER were proposed based on the characterizations and adsorption isotherms. This study demonstrates that ZMts possess simultaneous detoxification functions to mycotoxins with different polarities, and provides new insights into development of versatile mycotoxins adsorbents.
本研究聚焦于利用两性离子表面活性剂改性蒙脱石（ZMts）开发新型霉菌毒素吸附剂，用于同时去除高健康危害极性黄曲霉毒素 B（AFB）和低极性玉米赤霉烯酮（ZER）。制备了两种类型的 ZMts，包括十二烷基二甲基甜菜碱（BS-12）和月桂酰胺丙基甜菜碱（LAB-35）改性蒙脱石（BS-12/Mts 和 LAB-35/Mts），并通过不同技术探索了其结构、界面和纹理特征。结果表明，ZMts 基于表面活性剂类型和负载量具有不同的结构构型，从亲水性转变为疏水性，同时保留了 Mt 的中孔网络。所得吸附剂对 AFB 和 ZER 的解毒效率均有显著提高。pH 对 ZMts 的吸附影响不大，表明没有发生解吸。基于表征和吸附等温线，提出了原始 Mt、BS-12/Mts 和 LAB-35/Mts 对 AFB 和 ZER 的吸附机理。本研究表明 ZMts 具有同时去除不同极性霉菌毒素的解毒功能，为多功能霉菌毒素吸附剂的开发提供了新的思路。
