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Dispersant-assisted rotating liquid film reactor separation strategy for low-grade palygorskite purification with improved dye absorption performance

Published online by Cambridge University Press:  27 December 2024

Qihui Wang ,
Xiaoli Liu ,
Chao Jiang ,
Xingpeng Wang Open the ORCID record for Xingpeng Wang [Opens in a new window] ,
Linlin Wu ,
Huiyu Li Open the ORCID record for Huiyu Li [Opens in a new window] ,
Weiliang Tian  and
Yongjun Feng Open the ORCID record for Yongjun Feng [Opens in a new window]
Qihui Wang
Affiliation:
Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps, Alar, Xinjiang, China State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, China
Xiaoli Liu
Affiliation:
State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, China
Chao Jiang
Affiliation:
State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, China
Xingpeng Wang
Affiliation:
State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, China
Linlin Wu
Affiliation:
State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, China
Huiyu Li
Affiliation:
State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, China
Weiliang Tian
Affiliation:
Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps, Alar, Xinjiang, China
Yongjun Feng*
Affiliation:
Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps, Alar, Xinjiang, China State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, China
*
Corresponding author: Yongjun Feng; Email: [email protected]
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Abstract

Palygorskite (Pal) shows great potential for physical, chemical and biological uses due to its colloidal, catalytic and adsorption properties. Pal mines, however, are facing the challenge of low-grade materials (5–15%), making it difficult to use Pal in emerging fields such as new materials, environmental protection and health. Therefore, there is an urgent need to develop an efficient method for separating and purifying Pal to obtain high purity levels. Hence, we have developed a dispersant-assisted rotating liquid film reactor separation strategy based on sodium hexametaphosphate as the dispersant. This strategy utilizes the double electron layer of Pal and the density difference between impurities to achieve effective disaggregation and purification of Pal bundles through the promotion of repulsive driving effects. Under optimal conditions, the purity of Pal can be increased from less than 10% to over 80%. This research presents a novel approach to the efficient refining of low-grade Pal. The crudely purified Pal’s adsorption capacity for methylene blue increased from 84.2 to 256.4 mg g–1.

Keywords

Adsorptionpalygorskiterefiningrotating liquid film reactorsurfactant
Type
Article
Information
Clay Minerals , Volume 59 , Issue 4 , December 2024 , pp. 325 - 336
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of The Mineralogical Society of the United Kingdom and Ireland.

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Footnotes

‡

Authors contributed equally.

Associate Editor: Pilar Aranda

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