Depolymerization of polysilicic acid by tiron

Shuqin Bai, Yoshihiro Okaue, Takushi Yokoyama

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12 Citations (Scopus)


As a preliminary experiment for the development of an effective silica scale inhibitor at geothermal power plants, the effect of tiron, a ligand to monosilicic acid, on the polymerization of silicic acid was investigated by gel chromatographic method. The experiments were carried out at Si concentration of 400 ppm (14 μM) and at pH 8 where are a similar condition to geothermal water. The tiron concentration was varied (0-50 μM). At 30 μM of tiron, the polymerization of silicic acid occurred rapidly within first 1 h in spite of the presence of tiron, however, polysilicic acids were depolymerized by tiron. The depolymerization mechanism of polysilicic acids was discussed based on zeta potentials for silica gel particles in the absence and presence of tiron.

Original languageEnglish
Pages (from-to)1795-1799
Number of pages5
JournalPolymer Degradation and Stability
Issue number10
Publication statusPublished - Oct 2009

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Polymers and Plastics
  • Materials Chemistry


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