Dong Yiyang, Wang Chengming, Gao Yu, Xu Jing, Ping Hongzheng, Liu Fangrong, Niu Aifeng
College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Wuhan 430070, China.
Foods. 2025 Feb 25;14(5):787. doi: 10.3390/foods14050787.
Maxim. is a woody oil crop with great potential for edible oil production. While crude oil is rich in pigments, traditional bleaching methods have limited effectiveness in improving its color. In this study, a metal-organic framework (MOF) material, MIL-88B(Fe), was synthesized and used for the bleaching of Maxim. oil. The adsorption selectivity of MIL-88B(Fe) and the adsorption process of carotenoids and chlorophyll were investigated. The results demonstrated that the synthesized MIL-88B(Fe) exhibited excellent bleaching capability, achieving a bleaching rate of 97.67% in 65 min. It showed a strong adsorption effect on pigments, particularly carotenoids. The content of lutein decreased from 118.27 mg/kg to 0.01 mg/kg after 65 min of bleaching. The squalene and phytosterol contents in the oil were minimally affected by the bleaching process, while the free fatty acid content slightly increased due to the high reaction temperature and the adsorbent properties. The adsorption process of MIL-88B(Fe) was best described by a pseudo-first-order kinetic model, indicating that the adsorption was a spontaneous and endothermic chemical process. Moreover, MIL-88B(Fe) demonstrated good safety and reusability, making it a promising novel adsorbent for the bleaching of Maxim. oil and other oils with a high pigment content for the vegetable oil industry.
元宝枫是一种具有巨大食用油生产潜力的木本油料作物。虽然原油富含色素，但传统的漂白方法在改善其颜色方面效果有限。在本研究中，合成了一种金属有机框架（MOF）材料MIL-88B(Fe)，并将其用于元宝枫油的漂白。研究了MIL-88B(Fe)的吸附选择性以及类胡萝卜素和叶绿素的吸附过程。结果表明，合成的MIL-88B(Fe)表现出优异的漂白能力，在65分钟内漂白率达到97.67%。它对色素，特别是类胡萝卜素表现出强烈的吸附作用。漂白65分钟后，叶黄素含量从118.27毫克/千克降至0.01毫克/千克。油中的角鲨烯和植物甾醇含量受漂白过程的影响最小，而由于反应温度高和吸附剂特性，游离脂肪酸含量略有增加。MIL-88B(Fe)的吸附过程用准一级动力学模型描述最佳，表明吸附是一个自发的吸热化学过程。此外，MIL-88B(Fe)表现出良好的安全性和可重复使用性，使其成为植物油工业中用于元宝枫油和其他高色素含量油漂白的有前途的新型吸附剂。
