Safe trapping of cesium into pollucite structure by hot-pressing method
Authorized Users Only
2016
Authors
Omerašević, MiaMatović, Ljiljana
Ružić, Jovana
Golubović, Željko
Jovanović, Uroš D.
Mentus, Slavko V.
Dondur, Vera
Article (Published version)
Metadata
Show full item recordAbstract
A simple one-step method with direct thermal conversion at lower temperatures for preparing a stabile Cs-aluminsilicate phase, known as pollucite, is presented. Cs-exchanged form of Na, Ca-LTA type of zeolite (Cs-LTA) was pressureless sintered and hot pressed at certain temperatures in order to obtain pollucite. XRD and FTIR analysis were used to study structural changes of Cs-LTA before and after thermal treatments. Pressureless sintered sample recrystallized into pollucite phase after heat treatment at 1000 degrees C (3 h) (PLS1000) and hot pressed sample at 750 degrees C (3 h) using pressure of 35 MPa (HP750), indicating reduced temperature of 250 degrees. SEM micrographs confirmed that HP750 has higher density than PLS1000 which leads to higher value of compressive strength. The HP750 showed better resistance to Cs leaching than the PLS1000. Base on these results one can conclude that hot pressing is the promising method for the permanent disposal of Cs radionuclides. (C) 2016 Else...vier B.V. All rights reserved.
Keywords:
Cs disposal / Ion exchange / LTA zeolite / Hot pressing / Pollucite / Leaching testsSource:
Journal of Nuclear Materials, 2016, 474, 35-44Publisher:
- Elsevier
Funding / projects:
- Synthesis, processing and characterization of nanostructured materials for application in the field of energy, mechanical engineering, environmental protection and biomedicine (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45012)
- The effect of nano- and microconstituents on the synthesis and characteristics of novel composite materials with metal matrix (RS-MESTD-Basic Research (BR or ON)-172005)
DOI: 10.1016/j.jnucmat.2016.03.006
ISSN: 0022-3115; 1873-4820
WoS: 000374870100005
Scopus: 2-s2.0-84961226108
Collections
Institution/Community
VinčaTY - JOUR AU - Omerašević, Mia AU - Matović, Ljiljana AU - Ružić, Jovana AU - Golubović, Željko AU - Jovanović, Uroš D. AU - Mentus, Slavko V. AU - Dondur, Vera PY - 2016 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1038 AB - A simple one-step method with direct thermal conversion at lower temperatures for preparing a stabile Cs-aluminsilicate phase, known as pollucite, is presented. Cs-exchanged form of Na, Ca-LTA type of zeolite (Cs-LTA) was pressureless sintered and hot pressed at certain temperatures in order to obtain pollucite. XRD and FTIR analysis were used to study structural changes of Cs-LTA before and after thermal treatments. Pressureless sintered sample recrystallized into pollucite phase after heat treatment at 1000 degrees C (3 h) (PLS1000) and hot pressed sample at 750 degrees C (3 h) using pressure of 35 MPa (HP750), indicating reduced temperature of 250 degrees. SEM micrographs confirmed that HP750 has higher density than PLS1000 which leads to higher value of compressive strength. The HP750 showed better resistance to Cs leaching than the PLS1000. Base on these results one can conclude that hot pressing is the promising method for the permanent disposal of Cs radionuclides. (C) 2016 Elsevier B.V. All rights reserved. PB - Elsevier T2 - Journal of Nuclear Materials T1 - Safe trapping of cesium into pollucite structure by hot-pressing method VL - 474 SP - 35 EP - 44 DO - 10.1016/j.jnucmat.2016.03.006 ER -
@article{ author = "Omerašević, Mia and Matović, Ljiljana and Ružić, Jovana and Golubović, Željko and Jovanović, Uroš D. and Mentus, Slavko V. and Dondur, Vera", year = "2016", abstract = "A simple one-step method with direct thermal conversion at lower temperatures for preparing a stabile Cs-aluminsilicate phase, known as pollucite, is presented. Cs-exchanged form of Na, Ca-LTA type of zeolite (Cs-LTA) was pressureless sintered and hot pressed at certain temperatures in order to obtain pollucite. XRD and FTIR analysis were used to study structural changes of Cs-LTA before and after thermal treatments. Pressureless sintered sample recrystallized into pollucite phase after heat treatment at 1000 degrees C (3 h) (PLS1000) and hot pressed sample at 750 degrees C (3 h) using pressure of 35 MPa (HP750), indicating reduced temperature of 250 degrees. SEM micrographs confirmed that HP750 has higher density than PLS1000 which leads to higher value of compressive strength. The HP750 showed better resistance to Cs leaching than the PLS1000. Base on these results one can conclude that hot pressing is the promising method for the permanent disposal of Cs radionuclides. (C) 2016 Elsevier B.V. All rights reserved.", publisher = "Elsevier", journal = "Journal of Nuclear Materials", title = "Safe trapping of cesium into pollucite structure by hot-pressing method", volume = "474", pages = "35-44", doi = "10.1016/j.jnucmat.2016.03.006" }
Omerašević, M., Matović, L., Ružić, J., Golubović, Ž., Jovanović, U. D., Mentus, S. V.,& Dondur, V.. (2016). Safe trapping of cesium into pollucite structure by hot-pressing method. in Journal of Nuclear Materials Elsevier., 474, 35-44. https://doi.org/10.1016/j.jnucmat.2016.03.006
Omerašević M, Matović L, Ružić J, Golubović Ž, Jovanović UD, Mentus SV, Dondur V. Safe trapping of cesium into pollucite structure by hot-pressing method. in Journal of Nuclear Materials. 2016;474:35-44. doi:10.1016/j.jnucmat.2016.03.006 .
Omerašević, Mia, Matović, Ljiljana, Ružić, Jovana, Golubović, Željko, Jovanović, Uroš D., Mentus, Slavko V., Dondur, Vera, "Safe trapping of cesium into pollucite structure by hot-pressing method" in Journal of Nuclear Materials, 474 (2016):35-44, https://doi.org/10.1016/j.jnucmat.2016.03.006 . .