Stable solidification of cesium with an allophane additive by a pressing/sintering method
Source abstract
Abstract
Abstract Pyrolysis of AMP/SiO 2 adsorbed Cs (AMP-Cs/SiO 2 ) occurred at > 400 °C sintering temperature, and Cs immobilisation decreased from 100% to 40% after sintering at 1200 °C. To safely dispose radioactive Cs, allophane was immobilized with AMP-Cs/SiO 2 to prepare a stable form by using a pressing/sintering method. The structure of AMP-Cs/SiO 2 collapsed, and cesium aluminosilicate formed more easily under conditions of higher sintering temperature (>800 °C) or increasing mixing ratio of allophane (mass ratio = 1:3 AMP-Cs/SiO 2 -allophane). The decomposition products of AMP-Cs/SiO 2 were Cs 2 O, MoO 3 and P 2 O 5 at 1200 °C. Cs 2 O volatilisation was depressed by allophane addition, and a stable immobilisation phase of Cs 4 Al 4 Si 20 O 48 formed. An immobilisation ratio of Cs of approximately 100% was maintained. The leachability of Cs for AMP-Cs/SiO 2 -allophane (1:3, 1200 °C) in distilled water at 25 °C and 90 °C for 15 days was estimated as 0.174% and 1.55%, respectively.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Chemical Synthesis and Characterization · Nuclear materials and radiation effects · Radioactive element chemistry and processing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (33)
Show source-provided references
1. Study on selective separation of cesium from high level liquid waste using a macroporous silica-based supramolecular recognition absorbent10.1007/s10967-012-1738-6 ↗
2. Improvement of Cs leaching resistance of solidified radwastes with copper ferrocyanide (CFC)-vermiculite10.1016/S0956-053X(99)00133-6 ↗
3. Study on adsorption behavior of cesium using ammonium tungstophosphate (AWP)-calcium alginate microcapsules10.1007/s11426-012-4696-5 ↗
4. Recovery and fixation of cesium ions by zeolites with various cations10.5182/jaie.24.75 ↗
5. Radioactive cesium removal from nuclear wastewater by novel inorganic and conjugate adsorbents10.1016/j.cej.2013.12.072 ↗
6. Selective decomtamination and stable solidification of Cs-insoluble ferrocyanide by zeolites10.4028/www.scientific.net/AST.94.75 ↗
7. Synthesis of ammonium molybdophosphate (AMP) loaded silica and its adsorption for cesium
8. Immobilization of cesium in alkaline activated fly ash matrix10.1016/j.jnucmat.2005.06.006 ↗
9. Decontamination and solidification of liquid radioactive waste using natural zeolite10.1007/s10163-014-0299-x ↗
10. Preferential removal and immobilization of stable and radioactive cesium in contaminated fly ash with nanometallic Ca/CaO methanol suspension10.1016/j.jhazmat.2014.06.044 ↗
11. Tungsten bronze-based nuclear waste form ceramics. Part 3: the system Cs0.3MxW1-xO3 for the immobilization of radio cesium10.1016/j.jnucmat.2006.06.019 ↗
12. Immobilization of radioactive wastes by embedding in phosphate ceramic10.1023/B:ATEN.0000027880.04363.d6 ↗
13. The immobilization of high level radioactive wastes using ceramics and glasses10.1023/A:1018646507438 ↗
14. Immobilization of cesium and strontium radionuclides in zeolite-cement blends10.1016/j.jhazmat.2005.12.020 ↗
15. Cation exchange applications of synthetic tobermorite for the immobilization and solidification of cesium and strontium in cement matrix10.1007/BF02903893 ↗
16. Experimental study on cesium immobilization in struvite structures10.1016/j.jhazmat.2015.09.049 ↗
17. A novel hydrothermal method to convert incineration ash into pollucite for the immobilization of a stimulant radioactive cesium10.1016/j.jhazmat.2015.12.024 ↗
18. Selective cesium uptake behavior of insoluble ferrocyanide loaded zeolites and development of stable solidification method10.5182/jaie.25.212 ↗
19. Selective decomtamination and stable solidification of Cs-insoluble ferrocyanide by zeolites10.4028/www.scientific.net/AST.94.75 ↗
20. Distribution and fixation of cesium and strontium in zeolite A and chabazite10.1080/18811248.1985.9735658 ↗
21. Selective capture of cesium and thallium from natural waters and simulated wastes with copper ferrocyanide functionalized mesoporous silica10.1016/j.jhazmat.2010.06.019 ↗
22. Facile one-pot synthesis of copper hexacyanoferrate nanoparticle functionalised silica monoliths for the selective entrapment of 137Cs10.1039/C4TA01266F ↗
23. The effect of γ-ray irradiation on the adsorption properties and chemical stability of AMP/SiO2 towards Cs(I) in HNO3 solution10.1007/s10967-016-4862-x ↗
24. Selective adsorption and stable solidification of radioactive cesium ions by porous silica gels loaded with insoluble ferrocyanides10.1007/s11426-014-5211-y ↗
25. Selective uptake of cesium by ammonium molybdophosphate (AMP)-calcium alginate composites10.1080/18811248.2001.9715108 ↗
26. Analysis and modeling of fixed bed sorption of cesium by AMP-PAN
27. Ammonium molybdophosphate impregnated alumina microspheres as a new generation sorbent for chromatographic 137Cs/137mBa generator10.1016/j.chroma.2011.11.059 ↗
28. Catalysis by 12-Molybdophosphates 1. Catalytic reactivity of 12-molybdophosphoric acid related to its thermal behavior investigated through IR, Raman, Polarographic, X-ray diffraction studies: a comparison with 12-molybdosilicic acid10.1006/jcat.1996.0358 ↗
29. Preparation and non-isothermal kinetics of polyoxometalate of ciprofloxacin with 12-phosphomolybdic acid
30. Del Debbio · 1994
31. Kinetics of the formation and decomposition of 12-molybdophosphate10.1021/ac00253a016 ↗
32. Leach of cesium and barium from sol-gel derived zincborosilicate and borosilicate glasses10.1023/A:1008708818951 ↗
33. Phase separation of cesium from lead borosilicate glass by heat treatment under a reducing atmosphere10.1016/j.jhazmat.2016.06.031 ↗