Hydrothermal preparation of diatomaceous earth combined with calcium silicate hydrate gels

Hirotaka Maeda, Emile Hideki Ishida

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


A novel composite for the removal of color in waste water was prepared by subjecting slurries consisting diatomaceous earth and slaked lime to a hydrothermal reaction at 180. °C. Subsequently, calcium silicate hydrate gels covered the surface of diatomaceous earth due to the reaction between the amorphous silica of diatomaceous earth and slaked lime. The formation of calcium silicate hydrate gels led to an increase in the specific surface area. The composites showed higher methylene blue adsorption capacity compared with diatomaceous earth. The improved adsorption capacity of the composites depended on the amount of the calcium silicate hydrate gels and their silicate anion chain-lengths.

Original languageEnglish
Pages (from-to)858-861
Number of pages4
JournalJournal of Hazardous Materials
Issue number2-3
Publication statusPublished - 2011 Jan 30


  • Calcium silicate hydrate gel
  • Color removal
  • Composite
  • Diatomaceous earth
  • Hydrothermal reaction

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis


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