中文摘要：由于黄曲霉毒素对人体有剧毒，因此亟需一种绿色温和的去除食品及饮料中黄曲霉毒素B1（AFB1）的方法。本研究首次尝试用膜技术，通过膜吸附器和生物催化膜两种方案去除AFB1。研究发现，虽然生物催化膜可以通过吸附及酶解两种方式去除AFB1，但生物吸附器更胜一筹，因为它在重力驱动流动模式下有更好的AFB1去除率(71%)及膜通量(60 L·m-2·h-1)。氢键结合静电引力是其主要的吸附机理，因而碱洗能完全去除膜中的AFB1并进行进一步降解。用该膜吸附器处理污染的苹果汁，实现了7个重复循环恒定去除AFB1。
外文摘要：A green and mild method for aflatoxin B1 (AFB1) removal from food and drinking is highly required due to its high toxicity to human. In this study, membrane technology was attempted firstly to remove AFB1 via two protocols, membrane adsorber and biocatalytic membrane. Four polyvinylidene fluoride microfiltration membranes with different pore size were used to prepare membrane adsorber through successively coating polydopamine (PDA) and polyethyleneimine (PEI) on the membrane surface, and laccase was then loaded on the PDA/PEI-coated membrane to prepare biocatalytic membrane. Although biocatalytic membrane could remove AFB1 by both adsorption and enzymatic degradation, membrane adsorber outperformed thanks to its greater AFB1 removal efficiency (71%) and permeate flux (60 L·m-2·h-1) under gravity-driven flow-through mode. Hydrogen bonding together with electrostatic attraction was its main adsorption mechanism, and thus alkaline cleaning could fully desorb AFB1 from the membrane and further degrade detached AFB1. The contaminative apple juice was treated by such membrane adsorber, which could achieve a constant AFB1 removal for 7 reuse cycles.
外文关键词：Membrane adsorber；Biocatalytic membrane；Aflatoxin B1；Laccase；Dopamine
作者：Li, SS；Luo, JQ；Fan, JX；Chen, XR；Wan, YH
作者单位：Chinese Acad Sci
期刊名称：SEPARATION AND PURIFICATION TECHNOLOGY
期刊影响因子：3.299
出版年份：2018
出版刊次：6
点击下载：用基于聚多巴胺中间层的多功能膜去除黄曲霉毒素B1