Porous composite containing a large amount of vaterite for recovery of phosphate resource

Hirotaka Maeda, Emile Hideki Ishida, Toshihiro Kasuga

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A novel composite for the recovery of phosphate resource from an effluent was prepared by subjecting a powder-compact consisting of vaterite and silica gel to hydrothermal reaction under steam pressure at 200 C. To prevent the transformation of vateraite to calcite, diluted sodium hydroxide solution was used as the solvent. Z-phase formed between the vaterite particles without their thermal decomposition, resulting in a solid with 60% porosity. Hydroxyapatite formed selectively at the surface of vaterite particles in the composite by reaction with phosphate ions in a phosphate buffer solution, leading to increase in the specific surface area.

Original languageEnglish
Pages (from-to)205-207
Number of pages3
JournalMaterials Letters
Volume122
DOIs
Publication statusPublished - 2014 May 1

Keywords

  • Ceramics
  • Composite materials
  • Hydrothermal solidification
  • Phosphate adsorption
  • Vaterite

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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