Precipitation of silicic acid from geothermal water by addition of cethyltrimethylammonium bromide.

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Other Title
  • 臭化セチルトリメチルアンモニウムを用いた地熱熱水からのケイ酸の沈殿・除去

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Description

Effect of cethyltrimethylammonium bromide (CTAB) on the precipitation of silica from geothermal water was examined. CTAB did not react with monosilicic acid and only polysilicic acid was precipitated by CTAB. There was an optimum pH for the precipitation of silica. Polysilicic acid was precipitated more easily with increasing their particle size. In the concentration range of 10-7 -10-4 mol dm-3 of CTAB, the amount of precipitated silica inreased with increasing concentration of CTAB and most of polysilicic acid was precipitated at CTAB concentration of 10-4 mol dm-3 within 5 min. It is suggested that the decrease in the negative charge on polysilicic acids due to the electrostatic adsorption of cethyltrimethylammonium (CTA+) ions on the surface of polysilicic acids and the hydrophobic interaction between CTA+ ions adsorbed on different polysilicic acids accelerate polymerization reaction between polysilicic acids to cause precipitation of silica.

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Details 詳細情報について

  • CRID
    1390282681103740288
  • NII Article ID
    130003624457
  • DOI
    10.11367/grsj1979.8.1
  • ISSN
    18835775
    03886735
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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