naa a22 4500 510750710 CHVBK 20180411083103.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s11270-013-1442-3 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1442-3 Mineral Synthesis in Si-Al-Ca Systems and Their Iodide Sorption Capacity under Alkaline Conditions [Elektronische Daten] [Xiaoji Liu, Atsushi Asai, Tsutomu Sato, Einstine Opiso, Tsubasa Otake, Tetsuro Yoneda] The release of anionic nuclides such as 129I from underground nuclear waste disposals is of great environmental concern due to its long half-life and high mobility in alkaline environments. The leachability of iodide is largely dependent on the sorption capacity of various Ca-bearing minerals such as ettringite, hydrocalumite, and calcium silicate hydrate (C-S-H) which are common hydration products of cement materials. Moreover, the pore water chemistry of cement materials is dominated by Si, Al, and Ca during the initial stage of weathering, and the ratios of the ions present vary much depending on the source materials. Examining the mineral phases generated in Si-Al-Ca systems with respect to different ratios of Si, Al, and Ca and their interaction with iodide is important to better understand the sorption behavior of iodide in nuclear waste disposal facilities. In this study, the mineral synthesis in Si-Al-Ca systems was conducted under alkaline conditions at ambient temperature, and the sorption behavior of iodide with the mineral phases was investigated during and after the mineral formation. The results showed that portlandite, C-S-H, stratlingite (CASH), hydrocalumite, gibbsite, and amorphous compounds were precipitated from the systems, depending on the Si, Al, and Ca ratios. The K d values of iodide were greatly affected by the Ca content and relatively high Ca-containing phases such as hydrocalumite, C-S-H, CASH, and portlandite showed high iodide retention capacity. Hence, ensuring the formation of these secondary minerals by modification of the chemical composition of cement materials could assist in safety design of nuclear waste disposals. Springer Science+Business Media Dordrecht, 2013 Mineral synthesis nationallicence Si-Al-Ca systems nationallicence Iodide sorption nationallicence Alkaline conditions nationallicence Cement materials nationallicence Liu Xiaoji Laboratory of Environmental Geology, Division of Solid Waste, Resources and Geoenvironmental Engineering, Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-Ku, 060-8628, Sapporo, Japan aut Asai Atsushi Laboratory of Environmental Geology, Division of Solid Waste, Resources and Geoenvironmental Engineering, Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-Ku, 060-8628, Sapporo, Japan aut Sato Tsutomu Laboratory of Environmental Geology, Division of Solid Waste, Resources and Geoenvironmental Engineering, Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-Ku, 060-8628, Sapporo, Japan aut Opiso Einstine Geoenvironmental Engineering Group, College of Engineering, Central Mindanao University, 8710, Musuan, Bukidnon, Philippines aut Otake Tsubasa Laboratory of Environmental Geology, Division of Solid Waste, Resources and Geoenvironmental Engineering, Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-Ku, 060-8628, Sapporo, Japan aut Yoneda Tetsuro Laboratory of Environmental Geology, Division of Solid Waste, Resources and Geoenvironmental Engineering, Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-Ku, 060-8628, Sapporo, Japan aut Water, Air, & Soil Pollution Springer Netherlands 224/3(2013-03-01), 1-13 0049-6979 224:3<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1442-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1442-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Xiaoji Laboratory of Environmental Geology, Division of Solid Waste, Resources and Geoenvironmental Engineering, Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-Ku, 060-8628, Sapporo, Japan aut NATIONALLICENCE 700 1- Asai Atsushi Laboratory of Environmental Geology, Division of Solid Waste, Resources and Geoenvironmental Engineering, Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-Ku, 060-8628, Sapporo, Japan aut NATIONALLICENCE 700 1- Sato Tsutomu Laboratory of Environmental Geology, Division of Solid Waste, Resources and Geoenvironmental Engineering, Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-Ku, 060-8628, Sapporo, Japan aut NATIONALLICENCE 700 1- Opiso Einstine Geoenvironmental Engineering Group, College of Engineering, Central Mindanao University, 8710, Musuan, Bukidnon, Philippines aut NATIONALLICENCE 700 1- Otake Tsubasa Laboratory of Environmental Geology, Division of Solid Waste, Resources and Geoenvironmental Engineering, Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-Ku, 060-8628, Sapporo, Japan aut NATIONALLICENCE 700 1- Yoneda Tetsuro Laboratory of Environmental Geology, Division of Solid Waste, Resources and Geoenvironmental Engineering, Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-Ku, 060-8628, Sapporo, Japan aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/3(2013-03-01), 1-13 0049-6979 224:3<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer