Mathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin

The aim of the study was to assess Cs+ ions transport phenomena from solidified spent ion exchange resin by mathematical modeling. The experimental results comparison was obtained by Hespe's Standard Leaching Method. For the leaching prediction rate as a function of time, diffusion and semi-emp...

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Autores principales:	Dimović Slavko D., Jelić Ivana V., Stanić Vojislav Đ., Kojić Andrea A., Božović Predrag M.
Formato:	article
Lenguaje:	EN
Publicado:	VINCA Institute of Nuclear Sciences 2021
Materias:	leaching immobilization cementation sorption radioactive waste Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/2b9a2900e8be4736b517b6a41e2df3b4
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spelling	oai:doaj.org-article:2b9a2900e8be4736b517b6a41e2df3b42021-11-22T11:03:07ZMathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin1451-39941452-818510.2298/NTRP210128016Dhttps://doaj.org/article/2b9a2900e8be4736b517b6a41e2df3b42021-01-01T00:00:00Zhttp://www.doiserbia.nb.rs/img/doi/1451-3994/2021/1451-39942100016D.pdfhttps://doaj.org/toc/1451-3994https://doaj.org/toc/1452-8185The aim of the study was to assess Cs+ ions transport phenomena from solidified spent ion exchange resin by mathematical modeling. The experimental results comparison was obtained by Hespe's Standard Leaching Method. For the leaching prediction rate as a function of time, diffusion and semi-empirical models were used. Due to the presence of spent ion exchange resin, the cement matrix absorbed a larger amount of water, swelled, and degraded. This phenomenon caused a significantly lower value of mechanical resistance to pressure. Also, through the increase of bentonite and zeolite content, the cement matrix decreased its mechanical resistance. The retention of cesium ions in the cement matrix was low and they were leached during the early phase of the investigation. The diffusion coefficient, De, decreased by three orders of magnitude with the addition of zeolite and bentonite in the cement matrix. Linear regression of experimental Cs+ leaching results, under static conditions, displayed that the semi-empirical parameter K3 than the absolute values of the parameters K2 and K1. Therefore, the contribution of matrix dissolution to the total radionuclides transport was irrelevant to the prevailing share of diffusion and surface washing processes.Dimović Slavko D.Jelić Ivana V.Stanić Vojislav Đ.Kojić Andrea A.Božović Predrag M.VINCA Institute of Nuclear Sciencesarticleleachingimmobilizationcementationsorptionradioactive wasteNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENNuclear Technology and Radiation Protection, Vol 36, Iss 2, Pp 163-167 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	leaching immobilization cementation sorption radioactive waste Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	leaching immobilization cementation sorption radioactive waste Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Dimović Slavko D. Jelić Ivana V. Stanić Vojislav Đ. Kojić Andrea A. Božović Predrag M. Mathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin
description	The aim of the study was to assess Cs+ ions transport phenomena from solidified spent ion exchange resin by mathematical modeling. The experimental results comparison was obtained by Hespe's Standard Leaching Method. For the leaching prediction rate as a function of time, diffusion and semi-empirical models were used. Due to the presence of spent ion exchange resin, the cement matrix absorbed a larger amount of water, swelled, and degraded. This phenomenon caused a significantly lower value of mechanical resistance to pressure. Also, through the increase of bentonite and zeolite content, the cement matrix decreased its mechanical resistance. The retention of cesium ions in the cement matrix was low and they were leached during the early phase of the investigation. The diffusion coefficient, De, decreased by three orders of magnitude with the addition of zeolite and bentonite in the cement matrix. Linear regression of experimental Cs+ leaching results, under static conditions, displayed that the semi-empirical parameter K3 than the absolute values of the parameters K2 and K1. Therefore, the contribution of matrix dissolution to the total radionuclides transport was irrelevant to the prevailing share of diffusion and surface washing processes.
format	article
author	Dimović Slavko D. Jelić Ivana V. Stanić Vojislav Đ. Kojić Andrea A. Božović Predrag M.
author_facet	Dimović Slavko D. Jelić Ivana V. Stanić Vojislav Đ. Kojić Andrea A. Božović Predrag M.
author_sort	Dimović Slavko D.
title	Mathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin
title_short	Mathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin
title_full	Mathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin
title_fullStr	Mathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin
title_full_unstemmed	Mathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin
title_sort	mathematical modeling of cs+ transport phenomena from solidified spent ion exchange resin
publisher	VINCA Institute of Nuclear Sciences
publishDate	2021
url	https://doaj.org/article/2b9a2900e8be4736b517b6a41e2df3b4
work_keys_str_mv	AT dimovicslavkod mathematicalmodelingofcstransportphenomenafromsolidifiedspentionexchangeresin AT jelicivanav mathematicalmodelingofcstransportphenomenafromsolidifiedspentionexchangeresin AT stanicvojislavđ mathematicalmodelingofcstransportphenomenafromsolidifiedspentionexchangeresin AT kojicandreaa mathematicalmodelingofcstransportphenomenafromsolidifiedspentionexchangeresin AT bozovicpredragm mathematicalmodelingofcstransportphenomenafromsolidifiedspentionexchangeresin
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Mathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin

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