Adsorption Kinetics of β-Carotene and Chlorophyll onto Acid-activated Bentonite in Model Oil

›› 2008, Vol. 16 ›› Issue (2): 270-276.

Adsorption Kinetics of β-Carotene and Chlorophyll onto Acid-activated Bentonite in Model Oil

童军茂¹, 武占省¹, 孙喜房¹, 徐小琳¹, 李春^1,2

1. Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Xinjiang 832003, China;
2. School of Life Science and Technology, Beijing Institute of Technology, Beijing 100081, China

收稿日期:2007-02-25 修回日期:2007-12-14 出版日期:2008-04-28 发布日期:2008-04-28
通讯作者: LI Chun,E-mail:lichun04@bit.edu.cn
基金资助:
Program for New Century Excellent Talents in University(NCET-04-0989);Ministry of Education "Chunhui Plan" International Cooperation Project(Z2006-1-83018);High Level Talent Start Fund Project of Shihezi University(500002072201);the Open Fund of Xinjiang Key Laboratory of Biological Resources and Genetic Engineering(XJDX 0201-2005-12)

Adsorption Kinetics of β-Carotene and Chlorophyll onto Acid-activated Bentonite in Model Oil

TONG Junmao¹, WU Zhansheng¹, SUN Xifang¹, XU Xiaolin¹, LI Chun^1,2

1. Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Xinjiang 832003, China;
2. School of Life Science and Technology, Beijing Institute of Technology, Beijing 100081, China

Received:2007-02-25 Revised:2007-12-14 Online:2008-04-28 Published:2008-04-28
Supported by:
Program for New Century Excellent Talents in University(NCET-04-0989);Ministry of Education "Chunhui Plan" International Cooperation Project(Z2006-1-83018);High Level Talent Start Fund Project of Shihezi University(500002072201);the Open Fund of Xinjiang Key Laboratory of Biological Resources and Genetic Engineering(XJDX 0201-2005-12)

摘要/Abstract

摘要： 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 of β-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.In addition,the amount and rate of adsorption on A25 increase synchronously with the initial pigment concentration and temperature.The results showed that the adsorption kinetics behavior of AAB with respect to the pigments is not influence by the xylene and edible oil solution.

关键词: acid-activated bentonite, pigment, model oil solution, adsorption kinetics

Abstract: 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 of β-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.In addition,the amount and rate of adsorption on A25 increase synchronously with the initial pigment concentration and temperature.The results showed that the adsorption kinetics behavior of AAB with respect to the pigments is not influence by the xylene and edible oil solution.

Key words: acid-activated bentonite, pigment, model oil solution, adsorption kinetics

童军茂, 武占省, 孙喜房, 徐小琳, 李春. Adsorption Kinetics of β-Carotene and Chlorophyll onto Acid-activated Bentonite in Model Oil[J]. , 2008, 16(2): 270-276.

TONG Junmao, WU Zhansheng, SUN Xifang, XU Xiaolin, LI Chun. Adsorption Kinetics of β-Carotene and Chlorophyll onto Acid-activated Bentonite in Model Oil[J]. , 2008, 16(2): 270-276.

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Adsorption Kinetics of β-Carotene and Chlorophyll onto Acid-activated Bentonite in Model Oil

Adsorption Kinetics of β-Carotene and Chlorophyll onto Acid-activated Bentonite in Model Oil

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