Highly effective Cs+ removal by turbidity-free potassium copper hexacyanoferrate-immobilized magnetic hydrogels

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dc.contributor.authorKim, Yun Konko
dc.contributor.authorKim, Taegeonko
dc.contributor.authorKim, Yonghwanko
dc.contributor.authorHarbottle, Davidko
dc.contributor.authorLee, Jae Wooko
dc.date.accessioned2017-08-08T06:45:30Z-
dc.date.available2017-08-08T06:45:30Z-
dc.date.created2017-07-17-
dc.date.created2017-07-17-
dc.date.issued2017-10-
dc.identifier.citationJOURNAL OF HAZARDOUS MATERIALS, v.340, pp.130 - 139-
dc.identifier.issn0304-3894-
dc.identifier.urihttp://hdl.handle.net/10203/225186-
dc.description.abstractPotassium copper hexacyanoferrate-immobilized magnetic hydrogel (MHPVA) has been synthesized via a facile freeze/thaw crosslinking method. The citric acid coated Fe3O4 is embedded into the hydrogel matrix to facilitate the dispersion of nano-sized KCuHCF particles for Cs+ removal, followed by the rapid recovery of the composite in a magnetic field. The Cs+ adsorption behavior of the MHPVA is fitted well with the Langmuir isotherm and the pseudo-second-order kinetic model. The MHPVA exhibits both high Cs+ adsorption capacity (82.8 mg/g) and distribution coefficient (Kd) of 1.18 × 106 mL/g (8.3 ppm Cs+, V/m = 1000 mL/g). Sorption of above 90% Cs+ to the MHPVA is achieved in less than 3 h of contact time. Moreover, the MHPVA reveals stable and high Cs+ removal efficiency across a wide pH range from 4 to 10. In terms of Cs+ selectivity, the MHPVA shows above 96% removal efficiency in the presence of 0.01 M competing cations such as Mg2+, Ca2+, Na+, and K+ with 1 ppm of Cs+. From a practical perspective, the MHPVA still exhibits stable and promising selective properties even in groundwater and seawater conditions and after 5 days of contact time the used adsorbent is rapidly recovered leaving a turbidity-free aqueous environment.-
dc.languageEnglish-
dc.publisherELSEVIER SCIENCE BV-
dc.subjectBLUE/GRAPHENE OXIDE NANOCOMPOSITES-
dc.subjectCESIUM ION REMOVAL-
dc.subjectRADIOACTIVE CESIUM-
dc.subjectAQUEOUS-SOLUTION-
dc.subjectSELECTIVE REMOVAL-
dc.subjectWATER-
dc.subjectADSORPTION-
dc.subjectEFFICIENT-
dc.subjectMECHANISM-
dc.subjectEXCHANGE-
dc.titleHighly effective Cs+ removal by turbidity-free potassium copper hexacyanoferrate-immobilized magnetic hydrogels-
dc.typeArticle-
dc.identifier.wosid000409149800014-
dc.identifier.scopusid2-s2.0-85023602239-
dc.type.rimsART-
dc.citation.volume340-
dc.citation.beginningpage130-
dc.citation.endingpage139-
dc.citation.publicationnameJOURNAL OF HAZARDOUS MATERIALS-
dc.identifier.doi10.1016/j.jhazmat.2017.06.066-
dc.contributor.localauthorLee, Jae Woo-
dc.contributor.nonIdAuthorKim, Taegeon-
dc.contributor.nonIdAuthorHarbottle, David-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorCesium removal-
dc.subject.keywordAuthorFukushima-
dc.subject.keywordAuthorPotassium copper hexacyanoferrate-
dc.subject.keywordAuthorIron oxide nanoparticle-
dc.subject.keywordAuthorMagnetic hydrogel-
dc.subject.keywordPlusBLUE/GRAPHENE OXIDE NANOCOMPOSITES-
dc.subject.keywordPlusCESIUM ION REMOVAL-
dc.subject.keywordPlusRADIOACTIVE CESIUM-
dc.subject.keywordPlusAQUEOUS-SOLUTION-
dc.subject.keywordPlusSELECTIVE REMOVAL-
dc.subject.keywordPlusWATER-
dc.subject.keywordPlusADSORPTION-
dc.subject.keywordPlusEFFICIENT-
dc.subject.keywordPlusMECHANISM-
dc.subject.keywordPlusEXCHANGE-
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