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A platform for research: civil engineering, architecture and urbanism
Sorption of radionuclides by cement-based barrier materials
https://orcid.org/0000-0003-1635-6362
Abstract This paper investigates the sorption of radionuclide ions, 137Cs+ and 90Sr2+, by cement-based barrier materials for radioactive waste disposal. A mortar with ternary binder is prepared and powder samples are ground from the hardened material following a predetermined granulometry. After pre-equilibrium with an artificial pore solution, the sorption behaviors of powder samples are investigated through single sorption and blended sorption. The results show that: (1) no systematic difference is observed for single and blended sorptions thus the interaction between 137Cs+ and 90Sr2+ sorptions must be weak; (2) the sorption kinetics is rapid and all characteristic times are less than 1d; (3) the sorption capacity is enhanced by C–A–S–H hydrates and the measured Kd values can be predicted from C–S–H sorption data with Ca/Si ratio equal to Ca/(Si+Al) ratio.
Sorption of radionuclides by cement-based barrier materials
https://orcid.org/0000-0003-1635-6362
Abstract This paper investigates the sorption of radionuclide ions, 137Cs+ and 90Sr2+, by cement-based barrier materials for radioactive waste disposal. A mortar with ternary binder is prepared and powder samples are ground from the hardened material following a predetermined granulometry. After pre-equilibrium with an artificial pore solution, the sorption behaviors of powder samples are investigated through single sorption and blended sorption. The results show that: (1) no systematic difference is observed for single and blended sorptions thus the interaction between 137Cs+ and 90Sr2+ sorptions must be weak; (2) the sorption kinetics is rapid and all characteristic times are less than 1d; (3) the sorption capacity is enhanced by C–A–S–H hydrates and the measured Kd values can be predicted from C–S–H sorption data with Ca/Si ratio equal to Ca/(Si+Al) ratio.
Sorption of radionuclides by cement-based barrier materials
https://orcid.org/0000-0003-1635-6362
Abstract This paper investigates the sorption of radionuclide ions, 137Cs+ and 90Sr2+, by cement-based barrier materials for radioactive waste disposal. A mortar with ternary binder is prepared and powder samples are ground from the hardened material following a predetermined granulometry. After pre-equilibrium with an artificial pore solution, the sorption behaviors of powder samples are investigated through single sorption and blended sorption. The results show that: (1) no systematic difference is observed for single and blended sorptions thus the interaction between 137Cs+ and 90Sr2+ sorptions must be weak; (2) the sorption kinetics is rapid and all characteristic times are less than 1d; (3) the sorption capacity is enhanced by C–A–S–H hydrates and the measured Kd values can be predicted from C–S–H sorption data with Ca/Si ratio equal to Ca/(Si+Al) ratio.
Sorption of radionuclides by cement-based barrier materials
Li, Kefei (author) / Pang, Xiaoyun (author)
Cement and Concrete Research ; 65 ; 52-57
2014-07-18
6 pages
Article (Journal)
Electronic Resource
English
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