DC Field | Value | Language |
---|---|---|
dc.contributor.author | Panak, PJ | ko |
dc.contributor.author | Kim, MA | ko |
dc.contributor.author | Yun, Jong-Il | ko |
dc.contributor.author | Kim, JI | ko |
dc.date.accessioned | 2007-11-20T05:48:30Z | - |
dc.date.available | 2007-11-20T05:48:30Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2003-10 | - |
dc.identifier.citation | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v.227, no.1-3, pp.93 - 103 | - |
dc.identifier.issn | 0927-7757 | - |
dc.identifier.uri | http://hdl.handle.net/10203/2046 | - |
dc.description.abstract | The chemical interaction of trivalent actinides, Am(III) and Cm(III) in the process of hydroxy aluminosilicate (HAS) colloid formation is investigated by time-resolved laser fluorescence spectroscopy (TRLFS) with the assistance of radiometry. A screening experiment is performed at the beginning to ascertain under what conditions HAS colloids are formed favourably and incorporate trivalent actinides in their oxo-bridge structure. While keeping the Si concentration constant at 10(-3) mol l(-1), the Al concentration is varied from 10(-7) to 10(-3) mol l(-1) in the pH range from 4 to 9. The electrolyte medium is made constant with 0.03 M NaCl. A trace amount of Am-241 or (CM)-C-248 is introduced at a concentration of 4.9 x 10(-8) mol l(-1). The favourable condition of HAS colloid formation as ascertained by radiometric experiment is found to be at around I pH 5 with 10(-6) -10(-5) mol l(-1) Al for a marginal amount and at pH greater than or equal to 7 with 10(-6)-10(-4) Mol l(-1) Al for a major amount. Spectroscopic speciation is made on Cm, for its high fluorescence yield, in various experimental solutions for the appraisal of its chemical binding within oxo-bridges of HAS colloids. Speciation made by TRLFS shows two colloid-borne Cm species, Cm-HAS(I) and Cm-HAS(II), which have seven and six hydration water molecules, respectively. These results put forward a conclusion that the former undergoes a bidentate oxo-bridge binding and the latter a tridentate binding. In the absence of Al, Cm undergoes reaction with silanol moieties to form Cm-silicate complexes, which are found to be distributed in three phases: ionic phase, colloid and precipitate. However, the formation of Cm-silicate colloids is marginal due to a low Cm concentration. Applying laser-induced breakdown detection (LIBD), an average size of colloids is found to be 11-13 nm in hard sphere diameter at different pH. (C) 2003 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.subject | LASER FLUORESCENCE SPECTROSCOPY | - |
dc.subject | INDUCED BREAKDOWN DETECTION | - |
dc.subject | GORLEBEN AQUIFER SYSTEMS | - |
dc.subject | RADIONUCLIDE MIGRATION | - |
dc.subject | GROUNDWATER COLLOIDS | - |
dc.subject | GAMMA-ALUMINA | - |
dc.subject | SORPTION | - |
dc.subject | CM(III) | - |
dc.subject | SILICA | - |
dc.subject | SIZE | - |
dc.title | Interaction of actinides with aluminosilicate colloids in statu nascendi. Part II: spectroscopic speciation of colloid-borne actinides(III) | - |
dc.type | Article | - |
dc.identifier.wosid | 000186490200010 | - |
dc.identifier.scopusid | 2-s2.0-0142183283 | - |
dc.type.rims | ART | - |
dc.citation.volume | 227 | - |
dc.citation.issue | 1-3 | - |
dc.citation.beginningpage | 93 | - |
dc.citation.endingpage | 103 | - |
dc.citation.publicationname | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | - |
dc.identifier.doi | 10.1016/S0927-7757(03)00351-0 | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Yun, Jong-Il | - |
dc.contributor.nonIdAuthor | Panak, PJ | - |
dc.contributor.nonIdAuthor | Kim, MA | - |
dc.contributor.nonIdAuthor | Kim, JI | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | aquatic colloids | - |
dc.subject.keywordAuthor | aluminosilicate colloids | - |
dc.subject.keywordAuthor | speciation | - |
dc.subject.keywordAuthor | americium | - |
dc.subject.keywordAuthor | curium | - |
dc.subject.keywordPlus | LASER FLUORESCENCE SPECTROSCOPY | - |
dc.subject.keywordPlus | INDUCED BREAKDOWN DETECTION | - |
dc.subject.keywordPlus | GORLEBEN AQUIFER SYSTEMS | - |
dc.subject.keywordPlus | RADIONUCLIDE MIGRATION | - |
dc.subject.keywordPlus | GROUNDWATER COLLOIDS | - |
dc.subject.keywordPlus | GAMMA-ALUMINA | - |
dc.subject.keywordPlus | SORPTION | - |
dc.subject.keywordPlus | CM(III) | - |
dc.subject.keywordPlus | SILICA | - |
dc.subject.keywordPlus | SIZE | - |
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