Visible-NIR absorption spectroscopy study of the formation of ternary plutonyl(VI) carbonate complexes
DC Field | Value | Language |
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dc.contributor.author | Jo, Yongheum | - |
dc.contributor.author | Cho, Hye-Ryun | - |
dc.contributor.author | Yun, Jong-Il | - |
dc.date.accessioned | 2023-07-05T04:04:44Z | - |
dc.date.available | 2023-07-05T04:04:44Z | - |
dc.date.created | 2023-06-26 | - |
dc.date.issued | 2020-09 | - |
dc.identifier.issn | 1477-9226 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/186259 | - |
dc.description.abstract | We present the first experimental evidence for the ternary complexation of calcium and magnesium ions with plutonyl(VI)tricarbonate species in carbonate-containing aqueous solutions using visible-NIR spectrophotometric titration. Prior to studying the ternary plutonyl(VI) carbonate complexation, visible-NIR absorption spectral information of PuO2(CO3)(2)(2-) and PuO2(CO3)(3)(4-) was successfully obtained. PuO2(CO3)(2)(2-) has a prominent peak at 853 nm and its molar absorptivity was determined to be epsilon(853, PuO2)(CO3)(2)(2-) = 49.0 +/- 4.2 M-1.cm(-1). The spectrophotometric titration results by adding calcium or magnesium to the plutonyl(VI) carbonate system consisting of PuO2(CO3)(2)(2-) and PuO2(CO3)(3)(4-) indicate the formation of CaPuO2(CO3)(3)(2-) and MgPuO2(CO3)(3)(2-) complexes and provide the formation constants at 0.1 M H/NaClO4 for MPuO2(CO3)(3)(2-) from PuO2(CO3)(3)(4-), log K = 4.33 +/- 0.50 and 2.58 +/- 0.18 for M = Ca2+ and Mg2+, respectively. In addition, the formation constants of CaPuO2(CO3)(3)(2-) and MgPuO2(CO3)(3)(2-) from PuO2(CO3)(3)(4-) at infinite dilution (log K degrees) were proposed to be 6.05 +/- 0.50 and 4.29 +/- 0.18, respectively, based on the correction of ionic strength using the Davies equation. The absorption spectrum of the ternary plutonyl(VI) complexes of CaPuO2(CO3)(3)(2-) is similar to that of PuO2(CO3)(3)(4-) with the exception of a characteristic absorption peak at 808 nm (epsilon(808, CaPuO2(CO3)32-) = 42.9 +/- 1.6 M-1.cm(-1)). According to the calculated aqueous plutonyl(VI) speciation including the ternary plutonyl(VI) complexes, CaPuO2(CO3)(3)(2-) is considered the dominant Pu(VI) species under environmental conditions, and plutonyl(VI) may be more mobile than expected in previous assessments. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | Royal Society of Chemistry | - |
dc.title | Visible-NIR absorption spectroscopy study of the formation of ternary plutonyl(VI) carbonate complexes | - |
dc.title.alternative | Visible-NIR absorption spectroscopy study of the formation of ternary plutonyl(vi) carbonate complexes | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Jo, Yongheum | - |
dc.identifier.doi | 10.1039/d0dt01982h | - |
dc.identifier.scopusid | 2-s2.0-85090073142 | - |
dc.identifier.wosid | 000563083800016 | - |
dc.identifier.bibliographicCitation | Dalton Transactions, v.49, no.33, pp.11605 - 11612 | - |
dc.relation.isPartOf | Dalton Transactions | - |
dc.citation.title | Dalton Transactions | - |
dc.citation.volume | 49 | - |
dc.citation.number | 33 | - |
dc.citation.startPage | 11605 | - |
dc.citation.endPage | 11612 | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | Y | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Inorganic & Nuclear | - |
dc.subject.keywordPlus | FORMATION-CONSTANTS | - |
dc.subject.keywordPlus | NACL SOLUTION | - |
dc.subject.keywordPlus | PLUTONI | - |
dc.subject.keywordPlus | UMURANIUM | - |
dc.subject.keywordPlus | CALCIUM | - |
dc.subject.keywordPlus | SPECIATION | - |
dc.subject.keywordPlus | STABILITY | - |
dc.subject.keywordPlus | URANYL | - |
dc.subject.keywordPlus | U(VI) | - |
dc.subject.keywordPlus | SOLUBILITY | - |
dc.identifier.url | https://pubs.rsc.org/en/content/articlelanding/2020/DT/D0DT01982H | - |
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