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Study Of The Influence Between Barium Ions And Calcium Ions On Morphology And Size Of Coprecipitation In Microemulsion

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  • NONG WANG

    (School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, People's Republic of China;
    Engineering and Technology Center of Gansu Province for Botanical Pesticides, Lanzhou Jiaotong University, Lanzhou 730070, People's Republic of China)

  • QING LUO MENG

    (School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, People's Republic of China)

Abstract

In this paper, we systematically drew a series of inverse-microemulsion quasi-ternary system phase diagrams ofOP-10+C8H17OH+C6H12+brine (CaCl2/BaCl2)by adjusting the ratio ofCaCl2andBaCl2. On this basis, microemulsions have been prepared with seven different molar ratios ofCa2+/Ba2+, and calcium carbonate and barium carbonate coprecipitation products were obtained by reaction with an equimolar amount of sodium carbonate. The influence of barium ion to morphology and composition of nanometer calcium carbonate were studied. These samples were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The SEM photographs indicated that when the content ofCa2+was higher, some incomplete large cube of coprecipitation particles were formed in solution, but with the content ofBa2+increased gradually, they formed a large number of small spherical particles, with the further increase ofBa2+concentration, the particles mainly had structures of irregular polyhedron eventually. The measurement results of FTIR and XRD indicated thatCaCO3coprecipitation products gradually changed from calcite to the vaterite, eventually turned into being aragonite with the further increase ofBa2+concentration.

Suggested Citation

  • Nong Wang & Qing Luo Meng, 2015. "Study Of The Influence Between Barium Ions And Calcium Ions On Morphology And Size Of Coprecipitation In Microemulsion," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 22(03), pages 1-10.
    • Handle: RePEc:wsi:srlxxx:v:22:y:2015:i:03:n:s0218625x15500365
    DOI: 10.1142/S0218625X15500365
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