用于去除“赭曲霉毒素A”和澄清葡萄酒的双功能粘土基吸附剂。

Bifunctional clay based sorbent for 'Ochratoxin A' removal and wine fining.

作者信息

Alford Roi, Mishael Yael G

机构信息

Department of Soil and Water Sciences, The Robert H. Smith Faculty of Agriculture, Food, and Environment, Hebrew University of Jerusalem, Rehovot 7610001, Israel.

出版信息

Food Chem. 2023 Aug 1;416:135827. doi: 10.1016/j.foodchem.2023.135827. Epub 2023 Mar 2.

DOI:10.1016/j.foodchem.2023.135827

PMID:36889016

Abstract

The treatment of Ochratoxin A (OTA), present in many agricultural commodities including wine, is unsatisfying even by adsorption to fining agents, such as the commercial clay montmorillonite (MMT), bentonite. We developed, characterized and tested new clay-polymer nanocomposites (CPNs) to optimize OTA treatment, adsorption and OTA-CPN removal by sedimentation, while maintaining product quality. OTA adsorption to the CPNs was optimized, fast and high, by varying polymer chemistry and configuration. OTA adsorption from grape juice was nearly 3 times higher by the CPN than by the MMT despite the larger particle size of the CPN, 125 vs. 3 µm, explained by diverse OTA-CPN interactions. The CPN outperformed MMT in terms of sedimentation rate (2-4 orders of magnitude faster), grape juice quality and volume loss (an order of magnitude less), highlighting the potential of applying composites for the removal of target molecules form beverages.

摘要

包括葡萄酒在内的许多农产品中都存在赭曲霉毒素A（OTA），即使通过吸附澄清剂（如商业用粘土蒙脱石（MMT）、膨润土）来处理，效果也不尽人意。我们开发、表征并测试了新型粘土-聚合物纳米复合材料（CPN），以优化OTA处理、吸附以及通过沉降去除OTA-CPN的过程，同时保持产品质量。通过改变聚合物的化学性质和构型，优化了OTA对CPN的吸附，该吸附过程快速且高效。尽管CPN的粒径较大（125微米对3微米），但CPN对葡萄汁中OTA的吸附量几乎是MMT的3倍，这可以通过多种OTA-CPN相互作用来解释。在沉降速率（快2至4个数量级）、葡萄汁质量和体积损失（少一个数量级）方面，CPN均优于MMT，这突出了应用复合材料从饮料中去除目标分子的潜力。