Hydrothermal preparation of tobermorite from blast furnace slag for Cs+ and Sr2+ sorption

Takuma Tsutsumi, Shunsuke Nishimoto, Yoshikazu Kameshima, Michihiro Miyake

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Al-substituted 11Å-tobermorite was formed by alkaline hydrothermal treatment of blast furnace slag with sodium silicate added at 180°C for 2-48h. Effects of the hydrothermal treatment time were characterized by XRD, SEM, and isothermal adsorption of N2. Sorption characteristics of the obtained samples were examined for Cs+ and Sr2+. The sample obtained by hydrothermal treatment for 48h (HT-48h) consisted of calcium silicate hydrate (C-S-H), and Al-substituted 11Å-tobermorite. The HT-48h showed the highest performance for Cs+ and Sr2+ selectivity in the presence of Na+. The interlayer Na+ of Al-substituted 11Å-tobermorite and surface Ca2+ played an important role in selective Cs+ and Sr2+.

Original languageEnglish
Pages (from-to)174-181
Number of pages8
JournalJournal of Hazardous Materials
Volume266
DOIs
Publication statusPublished - Feb 15 2014

Fingerprint

Calcium silicate
slag
Hydrates
Slags
Silicates
Sorption
sorption
Sodium
Adsorption
Scanning electron microscopy
silicate
Silicic Acid
calcium
scanning electron microscopy
X-ray diffraction
sodium
adsorption
tobermorite
blast furnace

Keywords

  • Al-substituted 11Å-tobermorite
  • Blast furnace slag
  • Hydrothermal treatment

ASJC Scopus subject areas

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

Cite this

Hydrothermal preparation of tobermorite from blast furnace slag for Cs+ and Sr2+ sorption. / Tsutsumi, Takuma; Nishimoto, Shunsuke; Kameshima, Yoshikazu; Miyake, Michihiro.

In: Journal of Hazardous Materials, Vol. 266, 15.02.2014, p. 174-181.

Research output: Contribution to journalArticle

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AU - Tsutsumi, Takuma

AU - Nishimoto, Shunsuke

AU - Kameshima, Yoshikazu

AU - Miyake, Michihiro

PY - 2014/2/15

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