State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Department of Applied Chemistry, Xi'an University of Technology, Xi'an 710048, PR China.
State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Department of Applied Chemistry, Xi'an University of Technology, Xi'an 710048, PR China.
Food Chem. 2021 May 1;343:128391. doi: 10.1016/j.foodchem.2020.128391. Epub 2020 Oct 15.
Deoxynivalenol (DON) is found widely in foods and feeds that are contaminated with mildew and is one of the most harmful mycotoxins, threating not only human health but also impacting animal husbandry. Various physical, chemical and biological detoxification strategies have been applied in the past to reduce mycotoxin contamination. As a practical and economic method, addition of montmorillonite (Mt) offers the potential to eliminate mycotoxins, especially aflatoxin B1 (AFB) and zearalenone (ZEA). Our study aimed to control DON, for the first time, using environmentally friendly Mt, modified with aluminum, iron and titanium via a pillaring effect to enlarge interlayer spacing. The materials were characterized using XRD, FTIR, SEM, EDS and BET. Spacing of the pillared Mt layers was shown to exceed that of raw Mt and could be tuned using the pillaring reagents (Al, Fe and Ti, 0.01 to 2.00 eq. relative to the cation exchange capacity of Mt). Adsorption of DON by pillared Mt was investigated using UPLC-MSMS (at pH 2.0 and 6.8). The results demonstrated that the adsorption ratios of 1.00-Al-Mt, 0.50-Fe-Mt and 1.00-Ti-Mt were 23.6%, 14.7% and 23.4%, respectively at pH 2.0 and 27.1%, 21.8%, and 27.4% correspondingly at pH 6.8 when added at 1.0 mg, which is 3-4 times higher than raw Mt (6.3-6.8% at pH 2.0 and 7.3-8.1% at pH 6.8). It was also found that with increased addition of pillared Mt (2.5 mg), the adsorption ratio approached 35%. The time for reaching equilibrium was approximately 120 min. These results demonstrated that Mt after pillaring modifications with Al, Fe and Ti can have potential for the control of DON in foods and feeds.
脱氧雪腐镰刀菌烯醇（DON）广泛存在于霉变的食物和饲料中，是最具危害性的霉菌毒素之一，不仅威胁人类健康，还会影响畜牧业。过去，人们应用了各种物理、化学和生物解毒策略来降低霉菌毒素污染。作为一种实用且经济的方法，添加蒙脱石（Mt）具有消除霉菌毒素的潜力，尤其是黄曲霉毒素 B1（AFB）和玉米赤霉烯酮（ZEA）。本研究首次使用经铝、铁和钛柱撑化处理的环保型 Mt 来控制 DON，通过柱撑作用扩大层间距。采用 XRD、FTIR、SEM、EDS 和 BET 对材料进行了表征。结果表明，柱撑 Mt 层间距超过了原 Mt，可以通过柱撑试剂（Al、Fe 和 Ti，相对于 Mt 的阳离子交换容量为 0.01 至 2.00 eq.）进行调节。采用 UPLC-MSMS（在 pH 2.0 和 6.8 下）研究了 DON 被柱撑 Mt 的吸附情况。结果表明，在 pH 2.0 下，1.00-Al-Mt、0.50-Fe-Mt 和 1.00-Ti-Mt 的吸附比分别为 23.6%、14.7%和 23.4%，在 pH 6.8 下，相应的吸附比分别为 27.1%、21.8%和 27.4%，当添加量为 1.0 mg 时，吸附比分别比原 Mt 高 3-4 倍（在 pH 2.0 下为 6.3-6.8%，在 pH 6.8 下为 7.3-8.1%）。随着柱撑 Mt 添加量的增加（2.5 mg），吸附比接近 35%。达到平衡的时间约为 120 分钟。这些结果表明，经 Al、Fe 和 Ti 柱撑改性后的 Mt 具有控制食物和饲料中 DON 的潜力。
