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Ligand-Specific Dissolution of Iron Oxides in Frozen Solutions

Cited 6 time in wos
Cited 5 time in scopus
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dc.contributor.authorKim, Kitae-
dc.contributor.authorChoi, Wonyong-
dc.contributor.authorChoi, Cheol Ho-
dc.contributor.authorLee, Woojin-
dc.contributor.authorMenacherry, Sunil Paul M.-
dc.date.accessioned2019-01-18T04:18:31Z-
dc.date.available2019-01-18T04:18:31Z-
dc.date.issued2018-12-04-
dc.identifier.issn0013-936X-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/9525-
dc.description.abstractThe dissolution of iron oxides (mainly goethite) induced by various ligands was investigated in aqueous and frozen solutions. While all the previous works on the dissolution of iron oxides reported higher iron dissolution rate in ice than in water, this work found that some ligands like ascorbic acid and citric acid suppress the iron dissolution in ice on the contrary. The extent of dissolution in water and ice highly varied depending on the kind and concentration of ligands, pH, and the kind of iron oxides. While most solutes are thought to be freeze-concentrated in the ice grain boundary region upon freezing, some ligands that exhibit the negative effects on the iron oxide dissolution in ice are proposed to be preferentially incorporated in the ice bulk and not freeze-concentrated. It was estimated that more than 50% of the total ascorbic acids are trapped in the ice lattice (pH 3) whereas a majority of iodide ions (>97%) are present in the ice surface (grain boundary) region. As a result, ascorbic acid molecules become less accessible to the iron oxide particles concentrated in the ice grain boundary and hence a suppressed dissolution of iron oxide in ice was observed. In addition, hydroxylamine enhanced the iron oxide dissolution in ice at pH 3 but suppressed it at higher pH. Theoretical calculations confirmed that the neutral form of hydroxylamine is preferentially incorporated in the ice lattice but its protonated form is more likely to be present on the ice surface region, which is in good agreement with the pH-dependent dissolution of goethite by hydroxylamine. The temperature-dependent goethite dissolution study found that ascorbic acid showed no sign of the freeze concentration of the ligand whereas hydroxylamine and iodide showed a clear sign of the freeze concentration of the ligands.en_US
dc.languageEnglish-
dc.language.isoenen_US
dc.subjectEngineering; Environmental Sciences & Ecologyen_US
dc.subject.classification기타()en_US
dc.titleLigand-Specific Dissolution of Iron Oxides in Frozen Solutionsen_US
dc.title.alternative리간드에 따른 얼음 내 산화철 용출반응 연구en_US
dc.typeArticleen_US
dc.identifier.bibliographicCitationKim, Kitae, et al. 2018. "Ligand-Specific Dissolution of Iron Oxides in Frozen Solutions". <em>ENVIRONMENTAL SCIENCE & TECHNOLOGY</em>, 52(23): 13766-13773.en_US
dc.citation.titleENVIRONMENTAL SCIENCE & TECHNOLOGYen_US
dc.citation.volume52en_US
dc.citation.number23en_US
dc.identifier.doi10.1021/acs.est.8b04484-
dc.citation.startPage13766en_US
dc.citation.endPage13773en_US
dc.description.articleClassificationSCI-
dc.description.jcrRateJCR 2016:5.24017467248908en_US
dc.subject.keywordbioavailable ironen_US
dc.subject.keywordchemistry in iceen_US
dc.subject.keywordfreeze concentration effecten_US
dc.subject.keywordENHANCED DISSOLUTIONen_US
dc.subject.keywordPYRUVIC-ACIDen_US
dc.subject.keywordVITAMIN-Cen_US
dc.subject.keywordBIOAVAILABILITYen_US
dc.subject.keywordHYDROXYLAMINEen_US
dc.subject.keywordACCELERATIONen_US
dc.subject.keywordADSORPTIONSen_US
dc.subject.keywordREACTIVITYen_US
dc.subject.keywordPHOTOLYSISen_US
dc.identifier.localId2018-0216-
dc.identifier.scopusid2-s2.0-85056721511-
dc.identifier.wosid000452693500012-
Appears in Collections  
2018-2018, Investigation of ice chemistry for understanding of environmental processes in polar region and its applications (18-18) / Kim, Kitae
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