活性白土对模拟油脂中β-胡萝卜素和叶绿素的吸附动力学研究

• Published in: 中国化学工程学报（英文版） Vol. 16; no. 2; pp. 270 - 276
• Main Authors: 童军茂, 武占省, 孙喜房, 徐小琳, 李春
• Format: Journal Article
• Language: Chinese
• Published: School of Life Science and Technology, Beijing Institute of Technology, Beijing 100081, China 2008; Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Xinjiang 832003, China%Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Xinjiang 832003, China
• Subjects: model oil solution; acid-activated bentonite; adsorption kinetics; pigment
• ISSN: 1004-9541

TQ02; The textural properties of acid-activated bentonite (AAB), which were prepared using four different concentrations of sulfuric acid, were analyzed by adsorption-desorption isotherm of nitrogen using an automated specific surface area and porosity analyzer. The total pore volume, specific surface area and average pore diameter of these four kinds of AAB show a regular changing trend, increasing first and then decreasing, the optimum of which can be achieved at a sulfuric acid concentration of 25% (sample A25). The kinetic analysis of the adsorption ofβ-carotene and chlorophyll in model oil solutions, namely, xylene and edible oil solution, has been investigated by using AAB. Experimental results indicated that the adsorption data fit the pseudo-second-order model well. The whole adsorption process of the two pigments on AAB was divided basically into two parts: the initial adsorption of pigments was rapid in the first 10 min, followed by a slower adsorption process till equilibrium was attained at 60 min