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Effect of Attapulgite Pore Size Distribution on Soybean Oil Bleaching

  • Original Paper
  • Published:
Journal of the American Oil Chemists' Society

Abstract

The pore size distribution and specific surface area of the attapulgite was a crucial parameter for the uptake of pigments of oil. Bleaching of the soybean oil with three attapulgites with different pore size distribution, which were assigned a, b, and c, respectively was investigated. The specific surface area and the pore size distribution of the attapulgites were characterized. The Freundlich isotherm analysis was used to evaluate the sorption capacity of the three attapulgite. Sample b gave the highest surface area and sample c the lowest. Sample b exhibited a wider pore distribution (8–65 Å) whereas samples a and c had more micropores smaller than 15 Å. Sample a, in contrast to samples b and c, was characterized by some larger pores (100–170 Å). The sorption capacity followed the sequence: attapulgite sample c > attapulgite sample a > attapulgite sample b. The sorption capacity was decided by the pore size distribution. The more pores with a distribution range 8–32 Å (i.e., close to the diameter of the pigments), the more pigments removed. The attapulgite sample c, which had most pores (8–32 Å) was the best.

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Acknowledgments

The authors express their gratitude to the NSFC (National Natural Science Foundation of China), for its financial support (Contract NO: 20376028). We also thank the Testing and Analysis Center of South Yangtze University.

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Authors and Affiliations

  1. School of Food Science and Technology, Southern Yangtze University, 1800 Lihu Road, Wuxi, 214122, Jiangsu Province, People’s Republic of China

    Jianhua Huang, Yuanfa Liu, Yue Liu & Xingguo Wang

  2. The Key Laboratory of Food Science and Safety, Ministry of Education, Southern Yangtze University, 1800 Lihu Road, Wuxi, 214122, Jiangsu Province, People’s Republic of China

    Jianhua Huang, Yuanfa Liu, Yue Liu & Xingguo Wang

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  1. Jianhua Huang
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  2. Yuanfa Liu
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  3. Yue Liu
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  4. Xingguo Wang
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Correspondence to Xingguo Wang.

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Huang, J., Liu, Y., Liu, Y. et al. Effect of Attapulgite Pore Size Distribution on Soybean Oil Bleaching. J Amer Oil Chem Soc 84, 687–692 (2007). https://doi.org/10.1007/s11746-007-1094-9

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  • DOI: https://doi.org/10.1007/s11746-007-1094-9

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