Gege Zhao, Haoyu Xu, Hai Zhang, Hong Zhang, Yanlan Bi, Xuebing Xu
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引用次数: 0
摘要
粗椰子油通常含有大量多环芳烃（PAHs），这些物质通常具有致癌性。本研究表明，离子液体（ILs）可显著去除椰子油中的多环芳烃。研究人员使用 12 种不同类型的离子液体研究了去除效率与离子液体结构之间的关系。其中，1-丁基-3-甲基咪唑鎓对甲苯磺酸盐（[Bmim][TOS]）对苯并(a)芘（BaP）的去除效率最高。探讨了使用[Bmim][TOS]去除多环芳烃的最佳工艺条件，在最佳条件下，苯并(a)蒽（BaA）、菊烯（CHR）、苯并(b)荧蒽（BbF）和BaP的去除率分别为42.7±1.0%、33.3±1.4%、88.8±0.9%和73.8±1.0%。重要的是，[Bmim][TOS]可以循环使用多达五次，而多环芳烃的去除率并没有显著下降。以 BaP 为模型化合物，通过量子化学计算和光谱分析研究了 ILs 与 PAHs 之间的相互作用。[Bmim][TOS]去除 PAHs 的能力源于其较高的氢键接受能力以及 PAHs 与 ILs 之间协同的氢键相互作用。
Removal and mechanism investigation of polycyclic aromatic hydrocarbons in coconut oils by ionic liquids
Crude coconut oil often contains high levels of polycyclic aromatic hydrocarbons (PAHs), which are commonly carcinogenic. The present work demonstrated that PAHs in coconut oil were significantly removed by ionic liquids (ILs). The relationship between the removal efficiency and the structures of ILs was investigated, using 12 different types ILs. Among these, 1-butyl-3-methylimidazolium tosylate ([Bmim][TOS]) showed the highest efficiency in removing benzo(a)pyrene (BaP). The optimal process conditions for the removal of PAHs using [Bmim][TOS] were explored, and the removal efficiency for benzo(a)anthracene (BaA), chrysene (CHR), benzo(b)fluoranthene (BbF), and BaP under the optimal conditions were 42.7 ± 1.0, 33.3 ± 1.4, 88.8 ± 0.9, and 73.8 ± 1.0%, respectively. Importantly, [Bmim][TOS] could be recycled up to five times without a significant decrease in PAHs removal. The quantum chemistry calculations and spectrum analyses were conducted to study the interactions between ILs and PAHs, using BaP as a model compound. The ability of [Bmim][TOS] to remove PAHs originate its high hydrogen bond accepting ability and the collaborative hydrogen bond interactions between the PAHs and ILs.
期刊介绍：
The Journal of the American Oil Chemists’ Society (JAOCS) is an international peer-reviewed journal that publishes significant original scientific research and technological advances on fats, oils, oilseed proteins, and related materials through original research articles, invited reviews, short communications, and letters to the editor. We seek to publish reports that will significantly advance scientific understanding through hypothesis driven research, innovations, and important new information pertaining to analysis, properties, processing, products, and applications of these food and industrial resources. Breakthroughs in food science and technology, biotechnology (including genomics, biomechanisms, biocatalysis and bioprocessing), and industrial products and applications are particularly appropriate.
JAOCS also considers reports on the lipid composition of new, unique, and traditional sources of lipids that definitively address a research hypothesis and advances scientific understanding. However, the genus and species of the source must be verified by appropriate means of classification. In addition, the GPS location of the harvested materials and seed or vegetative samples should be deposited in an accredited germplasm repository. Compositional data suitable for Original Research Articles must embody replicated estimate of tissue constituents, such as oil, protein, carbohydrate, fatty acid, phospholipid, tocopherol, sterol, and carotenoid compositions. Other components unique to the specific plant or animal source may be reported. Furthermore, lipid composition papers should incorporate elements of yeartoyear, environmental, and/ or cultivar variations through use of appropriate statistical analyses.
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