title: Hydrothermal preparation of tobermorite from blast furnace slag for Cs+ and Sr2+ sorption.
abstract: Al-substituted 11Å-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 Sr(2+). The sample obtained by hydrothermal treatment for 48 h (HT-48 h) consisted of calcium silicate hydrate (C-S-H), and Al-substituted 11Å-tobermorite. The HT-48 h showed the highest performance for Cs(+) and Sr(2+) selectivity in the presence of Na(+). The interlayer Na(+) of Al-substituted 11Å-tobermorite and surface Ca(2+) played an important role in selective Cs(+) and Sr(2+).
authors.affiliation: Department of Material and Energy Science, Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, kita-ku, Okayama 700-8530, Japan.
authors.forename: Takuma
authors.initials: T
authors.lastname: Tsutsumi
authors.affiliation: Department of Material and Energy Science, Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, kita-ku, Okayama 700-8530, Japan.
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Nishimoto
authors.affiliation: Department of Material and Energy Science, Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, kita-ku, Okayama 700-8530, Japan.
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Kameshima
authors.affiliation: Department of Material and Energy Science, Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, kita-ku, Okayama 700-8530, Japan. Electronic address: mmiyake@cc.okayama-u.ac.jp.
authors.forename: Michihiro
authors.initials: M
authors.lastname: Miyake
mesh_terms: D000327:Adsorption; D017610:Calcium Compounds / Q000737:chemistry*; D002586:Cesium / Q000737:chemistry*; D007220:Industrial Waste; D017640:Silicates / Q000737:chemistry*; D012964:Sodium / Q000737:chemistry; D013324:Strontium / Q000737:chemistry*
chemical_list: D017610:Calcium Compounds; D007220:Industrial Waste; D017640:Silicates; C512534:tobermorite; D002586:Cesium; D012964:Sodium; D013324:Strontium
keywords: Al-substituted 11Å-tobermorite; Blast furnace slag; Cs(+) and Sr(2+) sorption; Hydrothermal treatment