Mesoporous silica functionalized with (3-aminopropyl)trimethoxysilane was used as a selective adsorbent for free fatty acids (FFAs) and chlorophyll in olive oil. A series of mesoporous silica with 2, 5 and 10 nm pore diameters was modified with 3-aminopropyltrimethoxysilane via a post-synthetic reaction. The structural characteristics were confirmed by powder X-ray diffraction, electron microscopy and nitrogen-sorption analyses, and the adsorption capacity, selectivity, composition and thermal stability of olive oil were investigated. The adsorption of FFAs and chlorophyll depended on the surface functionalization and pore size, respectively. We discovered that aminopropyl-functionalized silica with a 5 nm pore size selectively adsorbed FFAs and chlorophyll without adsorbing other ingredients and changing the fatty acid composition ratio. The adsorption results obtained using regenerated silica also showed that this material can be used several times without severe performance degradation.

用（3-氨基丙基）三甲氧基硅烷官能化的介孔二氧化硅用作橄榄油中游离脂肪酸（FFA）和叶绿素的选择性吸附剂。经由后合成反应，用3-氨基丙基三甲氧基硅烷修饰一系列具有2、5和10nm孔径的中孔二氧化硅。通过粉末X射线衍射，电子显微镜和氮吸附分析确认了结构特征，并研究了橄榄油的吸附容量，选择性，组成和热稳定性。FFA和叶绿素的吸附分别取决于表面功能化和孔径。我们发现孔径为5 nm的氨丙基官能化二氧化硅选择性吸附了FFA和叶绿素，而没有吸附其他成分并改变脂肪酸组成比。