Solubility of niobium(V) in cementitious systems relevant for nuclear waste disposal: Characterization of the solubility-controlling solid phases
DC Field | Value | Language |
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dc.contributor.author | Jo, Yongheum | - |
dc.contributor.author | Garbev, Krassimir | - |
dc.contributor.author | Cevirim-Papaioannou, Nese | - |
dc.contributor.author | Blanco, Oliver Dieste | - |
dc.contributor.author | de Blochouse, Benny | - |
dc.contributor.author | Altmaier, Marcus | - |
dc.contributor.author | Gaona, Xavier | - |
dc.date.accessioned | 2023-07-05T04:05:36Z | - |
dc.date.available | 2023-07-05T04:05:36Z | - |
dc.date.created | 2023-06-26 | - |
dc.date.issued | 2022-10 | - |
dc.identifier.issn | 0304-3894 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/186266 | - |
dc.description.abstract | Neutron activation of 93Nb in structural materials of nuclear reactors generates the radioactive, beta--gamma emitting 94Nb isotope (t1/2= 2.04.104 a). Waste streams containing 94Nb are disposed in repositories for low-and intermediate-level waste, which are characterized by the extensive use of cementitious materials. The chemical behavior of niobium in these systems remains ill-defined, especially with respect to the solid phases controlling its solubility. Oversaturation solubility experiments in synthetic solutions representative of cementitious pore water (10 < pH < 12.5) show the precipitation of Nb, with [Nb] < 10-7 M at equilibrium. The increase in solubility observed at pH > 12.5 is attributed to negatively charged hydrolysis species stabilized by Ca. Solids controlling Nb solubility were characterized by a multi-method approach. XRD, Raman and quantitative chemical analysis support the predominance of cubic pyrochlore Ca2Nb2O7(cr) at pH & AP;13.5, as well as in systems at pH & AP;12 and high [Ca]. The incorporation of K in the pyrochlore structure was observed in pore water systems containing potassium, whereas CaNb2O6(cr) plays a predominant role at pH & AP;10-11. This work pro-vides an improved scientific basis to assess solid phase formation and solubility behavior of Nb(V) in cementi-tious systems relevant for nuclear waste disposal. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER | - |
dc.title | Solubility of niobium(V) in cementitious systems relevant for nuclear waste disposal: Characterization of the solubility-controlling solid phases | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Jo, Yongheum | - |
dc.identifier.doi | 10.1016/j.jhazmat.2022.129810 | - |
dc.identifier.scopusid | 2-s2.0-85137408312 | - |
dc.identifier.wosid | 000863054400005 | - |
dc.identifier.bibliographicCitation | JOURNAL OF HAZARDOUS MATERIALS, v.440, pp.1 - 9 | - |
dc.relation.isPartOf | JOURNAL OF HAZARDOUS MATERIALS | - |
dc.citation.title | JOURNAL OF HAZARDOUS MATERIALS | - |
dc.citation.volume | 440 | - |
dc.citation.startPage | 1 | - |
dc.citation.endPage | 9 | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Environmental Sciences & Ecology | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Environmental Sciences | - |
dc.subject.keywordPlus | PYROCHLORE STRUCTURE | - |
dc.subject.keywordPlus | CRYSTAL-STRUCTURE | - |
dc.subject.keywordPlus | CHEMISTRY | - |
dc.subject.keywordPlus | CA2NB2O7 | - |
dc.subject.keywordPlus | NIOBATE | - |
dc.subject.keywordAuthor | Niobium | - |
dc.subject.keywordAuthor | Solubility | - |
dc.subject.keywordAuthor | CementSolid characterization | - |
dc.subject.keywordAuthor | Radioactive waste disposal | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S030438942201603X?via%3Dihub | - |
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