DC Field | Value | Language |
---|---|---|
dc.contributor.author | Wang, Guohui | - |
dc.contributor.author | Um, Wooyong | - |
dc.contributor.author | Kim, Dong-Sang | - |
dc.contributor.author | Kruger, Albert A. | - |
dc.date.accessioned | 2019-04-07T15:01:07Z | - |
dc.date.available | 2019-04-07T15:01:07Z | - |
dc.date.created | 2019-01-16 | - |
dc.date.issued | 2019-02 | - |
dc.identifier.issn | 0304-3894 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/95305 | - |
dc.description.abstract | Technetium-99 (Tc-99) incorporation within stable spinel phases is a novel method for Tc-99 removal and immobilization from waste streams. In this study, transformation of Ni-doped Fe(OH)(2)(s) to spinel minerals, e.g. trevorite (NiFe2O4), is explored as a method for removing Tc-99 from Hanford Waste Treatment and Immobilization Plant (WTP) primary off-gas waste stream simulant. The Fe(OH)(2)(s) transformation process was found to reduce Tc-99(VII) to Tc-99(IV) and incorporate reduced Tc(VI) into the produced spinel simultaneously. Nickel doping was applied in the mineral transformation to inhibit potential reoxidation of Tc-99(IV). Solid phase characterization by XRD and XANES confirmed the formation of nickel substituted ferric-spinel, and suggest incorporation of Tc-99(IV) in the final spinel. Furthermore, in the primary off-gas stream, which contains both redox-sensitive contaminants Cr(VI) and Tc-99(VII), results from solution analysis and solid digestion indicate that nearly 100% Cr and over 80% Tc-99 can be simultaneously removed by adding Fe(OH)(2)(s) to solution with a solid to solution ratio of 5 g/L under near neutral and alkaline conditions. The Tc-99 removal approach developed herein provides an alternative treatment method to eliminate the proposed recycle process of the off-gas waste stream, which ultimately can reduce WTP mission cost and operation time. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.relation.isPartOf | JOURNAL OF HAZARDOUS MATERIALS | - |
dc.title | Tc-99 immobilization from off-gas waste streams using nickel-doped iron spinel | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.jhazmat.2018.09.064 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | JOURNAL OF HAZARDOUS MATERIALS, v.364, pp.69 - 77 | - |
dc.identifier.wosid | 000452926500008 | - |
dc.citation.endPage | 77 | - |
dc.citation.startPage | 69 | - |
dc.citation.title | JOURNAL OF HAZARDOUS MATERIALS | - |
dc.citation.volume | 364 | - |
dc.contributor.affiliatedAuthor | Um, Wooyong | - |
dc.identifier.scopusid | 2-s2.0-85054808434 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | TECHNETIUM | - |
dc.subject.keywordPlus | REDUCTION | - |
dc.subject.keywordPlus | RHENIUM | - |
dc.subject.keywordPlus | FE(II) | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | TC(VII) | - |
dc.subject.keywordAuthor | Technetium (Tc-99) | - |
dc.subject.keywordAuthor | Primary off-gas simulant | - |
dc.subject.keywordAuthor | Fe(OH)(2)(s) | - |
dc.subject.keywordAuthor | Nickel-Doped spinel | - |
dc.subject.keywordAuthor | Trevorite | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Environmental Sciences | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Environmental Sciences & Ecology | - |
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