Synthesis of Functionalized Porous Montmorillonite via Solid-State NaOH Treatment for Efficient Removal of Cesium and Strontium Ions

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dc.contributor.authorKim, Yonghwanko
dc.contributor.authorKim, Yun Konko
dc.contributor.authorKim, Jung Hwanko
dc.contributor.authorYim, Man-Sungko
dc.contributor.authorHarbottle, Davidko
dc.contributor.authorLee, Jae Wooko
dc.date.accessioned2018-06-16T07:36:14Z-
dc.date.available2018-06-16T07:36:14Z-
dc.date.created2018-05-01-
dc.date.created2018-05-01-
dc.date.created2018-05-01-
dc.date.created2018-05-01-
dc.date.created2018-05-01-
dc.date.issued2018-08-
dc.identifier.citationApplied Surface Science, v.450, pp.404 - 412-
dc.identifier.issn0169-4332-
dc.identifier.urihttp://hdl.handle.net/10203/242517-
dc.description.abstractSolid-state NaOH treatment of montmorillonite clay was used to enhance the removal of Cs+ and Sr2+. Through this facile and low-cost modification, montmorillonite with a large BET surface area (117.1 m(2) g(-1)) and many surface functional groups (SiAOANa), demonstrated enhanced sorption kinetics (89% removal for 40 mg L-1 Cs+ and 23 mg L-1 Sr2+ in 1 h) with a sorption capacity of 290.7 mg g(-1) for Cs+ and 184.8 mg g(-1) for Sr2+, greatly exceeding the low sorption capacity (137.0 mg g(-1) for Cs+ and 15.6 mg g(-1) for Sr2+) of pristine montmorillonite. SEM-EDS and XPS analyses revealed that Cs+ and Sr2+ were ion-exchanged with Na+ on the surface functional groups formed following NaOH treatment. The performance of NaOH-treated montmorillonite was stable following gamma-ray irradiation (at 6 Gy h(-1) for 30 min) and across a broad range of pHs (3 to 11), exhibiting a high distribution coefficient (Kd) of 1.5 x 10(3) mL g(-1) for Cs+ (1.58 mg L-1) and 3.7 x 10(3) mL g(-1) for Sr2+ (1.64 mg L-1) under groundwater conditions where various cations including Na+, K+, and Ca2+ (V/m = 1 L/g) were present. The proposed method demonstrated great improvement of the sorption capacity of an abundant and inexpensive montmorillonite. (C) 2018 Elsevier B.V. All rights reserved.-
dc.languageEnglish-
dc.publisherELSEVIER SCIENCE BV-
dc.titleSynthesis of Functionalized Porous Montmorillonite via Solid-State NaOH Treatment for Efficient Removal of Cesium and Strontium Ions-
dc.typeArticle-
dc.identifier.wosid000433199000047-
dc.identifier.scopusid2-s2.0-85046402172-
dc.type.rimsART-
dc.citation.volume450-
dc.citation.beginningpage404-
dc.citation.endingpage412-
dc.citation.publicationnameApplied Surface Science-
dc.identifier.doi10.1016/j.apsusc.2018.04.181-
dc.contributor.localauthorYim, Man-Sung-
dc.contributor.localauthorLee, Jae Woo-
dc.contributor.nonIdAuthorHarbottle, David-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorMontmorillonite-
dc.subject.keywordAuthorAlkaline treatment-
dc.subject.keywordAuthorCesium-
dc.subject.keywordAuthorStrontium-
dc.subject.keywordAuthorSorption-
dc.subject.keywordPlusPOTASSIUM COPPER HEXACYANOFERRATE-
dc.subject.keywordPlusAQUEOUS-SOLUTION-
dc.subject.keywordPlusADSORPTION CAPACITY-
dc.subject.keywordPlusSELECTIVE REMOVAL-
dc.subject.keywordPlusCS+ REMOVAL-
dc.subject.keywordPlusNANOCOMPOSITES-
dc.subject.keywordPlusZEOLITES-
dc.subject.keywordPlusHYDROGEL-
dc.subject.keywordPlusEXCHANGE-
dc.subject.keywordPlusCARBON-
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