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Cross-linked chitosan polymers as generic adsorbents for simultaneous adsorption of multiple mycotoxins

文献类型： 外文期刊

作者： Zhao, Zhiyong 1 ; Liu, Na 3 ; Yang, Lingchen 2 ; Wang, Jianhua 3 ; Song, Suquan 2 ; Nie, Dongxia 4 ; Yang, Xianli; Hou 1 ;

作者机构： 1.Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Nutr Sci, Key Lab Food Safety Res, Shanghai 200031, Peoples R China

2.Nanjing Agr Univ, Coll Vet Med, Nanjing 210095, Jiangsu, Peoples R China

3.Shanghai Acad Agr Sci, Inst Agrofood Stand & Testing Technol, Lab Qual & Safety Risk Assessment Agroprod Shangh, Minist Agr, Shanghai 201403, Peoples R China

4.Shanghai Acad Agr S

关键词： Multiple mycotoxins;Cross-linked chitosan;Biosorption;In vitro;Adsorption isotherm model

期刊名称：FOOD CONTROL （ 影响因子：5.548； 五年影响因子：5.498 ）

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收录情况： SCI

摘要： The primary objective of this study was to synthesize three types of cross-linked chitosan polymers and further investigate their adsorption capability for multiple mycotoxins, including aflatoxin B-1 (AFB(1)), ochratoxin A (OTA), zearalenone (ZEN), fumonisin B1 (FB1), deoxynivalenol (DON) and T-2 toxin (T2). Among these synthetic adsorbents, cross-linked chitosan-glutaraldehyde complex presented the highest adsorption capability for AFB(1) (73%), OTA (97%), ZEN (94%) and FBI (99%), but no obvious adsorption for DON and T2 (<30%). The effect of various incubation conditions (contact time, dosage and pH) was also studied. Subsequently, the experimental data were fitted to Langmuir, Freundlich and Hill models. The best fitting model to describe AFB(1) and FB1 adsorption was Langmuir model (R-2 >= 0.99), with the theoretical maximum adsorption amounts of 5.67 mg/g for AFB(1) and 15.7 mg/g for FBI. The Hill model was the best model for OTA and ZEN adsorption (R-2 > 0.98), with the predicted maximum adsorption amounts were 24.8 mg/g for OTA and 9.18 mg/g for ZEN. In addition, the adsorption capability of adsorbent for the simultaneous presence of multiple mycotoxins was also evaluated in buffer system and simulated gastrointestinal condition. The results indicated that the coexisted multiple mycotoxins didn't affected the adsorption capability of adsorbent, whereas the adsorption amounts of toxins were decreased by some gastrointestinal components. The findings of this research suggest that chitosan glutaraldehyde complex has the potential to be applied as multitoxin adsorbent material for reducing the combined adverse effect of multiple mycotoxins on humans and animals. (C) 2015 Elsevier Ltd. All rights reserved.

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