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Synthesis and characterization of montmorillonite inorgano-intercalation compound assisted by microwave irradiation

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Abstract

A montmorillonite inorgano-intercalation compound(MIIC) was synthesized by using a purified Na-exchanged bentonite (PNaB) as a matrix and Al-pillaring ion as an intercalating reagent under microwave irradiation. The synthesized products were characterized by X-ray diffraction (XRD), 27Al magic angle sample-spinning nuclear magnetic resonance (27Al MAS NMR), specific surface area (BET) measurement, and adsorption density determination. The results show that, at 5% solid (PNaB) concentration and 7 minutes irradiation in a 130 W microwave oven, the basal spacing d (001) of the synthesized MIIC increases to 1.740 nm from the original 1.218 nm of PNaB. The MIIC has much higher adsorptive densities to F− and Cr6+ from aqueous solution than the PNaB. The adsorption isotherm of F− on the MIIC follows the Freundlich equation, and the increased adsorption is mainly due to the porous structure of the MIIC which created larger adsorption surfaces. The adsorption isotherm of Cr6+ on MIIC follows the Langmuir equation and the adsorption is mainly monolayer as a result of chemisorptions.

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Authors and Affiliations

  1. School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, China

    Mingli Cao  (曹明礼) & Yongfu Yu

Authors
  1. Mingli Cao  (曹明礼)
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  2. Yongfu Yu
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Correspondence to Mingli Cao  (曹明礼).

Additional information

Funded by Specialized Research Project for the Doctoral Program of Higher Education (No. 20020497005) and for Unversity Key Teacher by the Ministry of Education, China.

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Cao, M., Yu, Y. Synthesis and characterization of montmorillonite inorgano-intercalation compound assisted by microwave irradiation. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 25, 444–448 (2010). https://doi.org/10.1007/s11595-010-0020-4

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  • DOI: https://doi.org/10.1007/s11595-010-0020-4

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