Glycomics and Glycan Bioengineering Research Center, College of Food Science & Technology, Nanjing Agricultural University, Nanjing 210095, PR China.
Glycomics and Glycan Bioengineering Research Center, College of Food Science & Technology, Nanjing Agricultural University, Nanjing 210095, PR China.
Food Chem. 2018 Apr 1;244:260-265. doi: 10.1016/j.foodchem.2017.10.060. Epub 2017 Oct 12.
Natural deep eutectic solvents (NADESs) constitute a novel class of biodegradable and inexpensive solvents. In this study, twenty choline chloride- and glycerol-based NADESs were prepared and investigated as washing agents in the removal of cadmium (Cd) from rice flour for the first time. Choline chloride-based NADESs demonstrated good Cd removal (51%-96%). A natural, biodegradable surfactant, saponin, was mixed with the NADESs to enhance their efficiency. No increase in Cd removal was observed when glycerol-based NADESs were combined with 1% saponin; however, synergistic effects between saponin and choline chloride-based NADESs were observed during the washing process and >99% Cd was removed using NADES-saponin mixtures. Moreover, NADESs washing process did not affect the main chemical components or structure of rice flour. The mechanism of Cd removal by NADESs and regeneration of Cd-contaminated NADESs were also explored. The study presents a green and efficient way of removing Cd from contaminated rice.
天然深共晶溶剂 (NADES) 是一类新型的可生物降解且廉价的溶剂。本研究首次将 20 种基于氯化胆碱和甘油的 NADES 作为洗涤剂用于去除米粉中的镉 (Cd)。基于氯化胆碱的 NADES 对 Cd 的去除效果良好 (51%-96%)。天然生物可降解表面活性剂皂苷与 NADES 混合以提高其效率。当甘油基 NADES 与 1%皂苷混合时，Cd 的去除率没有增加；然而，在洗涤过程中观察到皂苷与基于氯化胆碱的 NADES 之间存在协同作用，使用 NADES-皂苷混合物可去除超过 99%的 Cd。此外，NADES 洗涤过程不会影响米粉的主要化学成分或结构。还探讨了 NADES 去除 Cd 的机制以及受污染 NADES 的再生。该研究提出了一种从污染的大米中去除 Cd 的绿色且高效的方法。
