Tsutsumi T, Nishimoto S, Kameshima Y, Miyake M. Hydrothermal preparation of tobermorite from blast furnace slag for Cs+ and Sr2+ sorption.
J Hazard Mater 2014;
266:174-181. [PMID:
24412625 DOI:
10.1016/j.jhazmat.2013.12.024]
[Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 12/16/2013] [Accepted: 12/17/2013] [Indexed: 06/03/2023]
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+).
Collapse