Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
576982 | Journal of Hazardous Materials | 2014 | 8 Pages |
Abstract
Al-substituted 11Â Ã
-tobermorite was formed by alkaline hydrothermal treatment of blast furnace slag with sodium silicate added at 180 °C for 2-48 h. 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 48 h (HT-48 h) consisted of calcium silicate hydrate (C-S-H), and Al-substituted 11 Ã
-tobermorite. The HT-48Â h showed the highest performance for Cs+ and Sr2+ selectivity in the presence of Na+. The interlayer Na+ of Al-substituted 11Â Ã
-tobermorite and surface Ca2+ played an important role in selective Cs+ and Sr2+.
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Authors
Takuma Tsutsumi, Shunsuke Nishimoto, Yoshikazu Kameshima, Michihiro Miyake,