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

Takuma Tsutsumi; Shunsuke Nishimoto; Yoshikazu Kameshima; Michihiro Miyake

doi:10.1016/j.jhazmat.2013.12.024

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 journal › Article › peer-review

71 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 language	English
Pages (from-to)	174-181
Number of pages	8
Journal	Journal of Hazardous Materials
Volume	266
DOIs	https://doi.org/10.1016/j.jhazmat.2013.12.024
Publication status	Published - Feb 15 2014

Keywords

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

ASJC Scopus subject areas

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

Access to Document

10.1016/j.jhazmat.2013.12.024

Cite this

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title = "Hydrothermal preparation of tobermorite from blast furnace slag for Cs+ and Sr2+ sorption",

abstract = "Al-substituted 11{\AA}-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 11{\AA}-tobermorite. The HT-48h showed the highest performance for Cs+ and Sr2+ selectivity in the presence of Na+. The interlayer Na+ of Al-substituted 11{\AA}-tobermorite and surface Ca2+ played an important role in selective Cs+ and Sr2+.",

keywords = "Al-substituted 11{\AA}-tobermorite, Blast furnace slag, Hydrothermal treatment",

author = "Takuma Tsutsumi and Shunsuke Nishimoto and Yoshikazu Kameshima and Michihiro Miyake",

note = "Funding Information: This work was partly supported by the Steel Foundation for Environmental Protection Technology .",

year = "2014",

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T1 - Hydrothermal preparation of tobermorite from blast furnace slag for Cs+ and Sr2+ sorption

AU - Tsutsumi, Takuma

AU - Nishimoto, Shunsuke

AU - Kameshima, Yoshikazu

AU - Miyake, Michihiro

N1 - Funding Information: This work was partly supported by the Steel Foundation for Environmental Protection Technology .

PY - 2014/2/15

Y1 - 2014/2/15

N2 - 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+.

AB - 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+.

KW - Al-substituted 11Å-tobermorite

KW - Blast furnace slag

KW - Hydrothermal treatment

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