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Study on thermal activated sepiolite for enhancing decoloration of crude palm oil

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Abstract

Thermal activated sepiolite was prepared and used as an adsorbent for efficient decoloration of crude palm oil. The effects of activation temperature on the structure of sepiolite were investigated by Fourier transform infrared spectroscopy, X-ray fluorescence, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, Zeta potential and nitrogen adsorption–desorption isotherms techniques, and the decolorization efficiency for crude palm oil was systematically evaluated by Lovibond tone. The results indicate that the thermal activation of sepiolite affects its structure and decoloration efficiency. The Red value and content of phosphorus only reduced by 28.29 and 68.00 %, respectively, after decoloring with acid-treated sepiolite, but by 57.14 and 76.00 %, respectively, after thermal activation because that the thermal activation improved the porous structure and surface activity of sepiolite by releasing different kinds of waters and creating new adsorptive sites. In addition, the suitable activation temperature (400 °C) is significant to reach an optimal decoloring capacity.

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Acknowledgements

The authors would like to thank the Jiangsu Provincial Joint Innovation and Research Funding of Enterprises, Colleges and Institutes-Prospective Cooperative Research Project (No. BY2012150) and the West Light Foundation of The Chinese Academy of Sciences (The Science Development Talent Teach words [2012] No. 179) for the financial support of this research.

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Authors and Affiliations

  1. Center for Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, 730000, People’s Republic of China

    Guangyan Tian, Wenbo Wang, Yuru Kang & Aiqin Wang

  2. University of the Chinese Academy of Science, Beijing, 100049, People’s Republic of China

    Guangyan Tian

  3. R&D Center of Xuyi Attapulgite Applied Technology, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Xuyi, 211700, People’s Republic of China

    Guangyan Tian, Wenbo Wang, Yuru Kang & Aiqin Wang

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  1. Guangyan Tian
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Correspondence to Aiqin Wang.

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Tian, G., Wang, W., Kang, Y. et al. Study on thermal activated sepiolite for enhancing decoloration of crude palm oil. J Therm Anal Calorim 117, 1211–1219 (2014). https://doi.org/10.1007/s10973-014-3932-y

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  • DOI: https://doi.org/10.1007/s10973-014-3932-y

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