Dual functional amorphous aluminosilicate sorbents for removing and cold-immobilizing cesium/cobalt/nickel-ions

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dc.contributor.authorLee, Sko
dc.contributor.authorHassan, MUko
dc.contributor.authorRyu, Ho Jinko
dc.date.accessioned2021-12-23T06:42:58Z-
dc.date.available2021-12-23T06:42:58Z-
dc.date.created2021-12-23-
dc.date.created2021-12-23-
dc.date.created2021-12-23-
dc.date.issued2021-12-
dc.identifier.citationSUSTAINABLE MATERIALS AND TECHNOLOGIES, v.30-
dc.identifier.issn2214-9937-
dc.identifier.urihttp://hdl.handle.net/10203/290988-
dc.description.abstractDirect cold immobilization of the spent amorphous aluminosilicate adsorbent was achieved via a low-temperature sintering process at 200 °C without the addition of any binder or liquid agent for the first time. In this study, the amorphous aluminosilicates were synthesized as adsorbents for cesium/cobalt/nickel-ions and the measured maximum adsorption capacities of cesium, cobalt, and nickel-ions were 53.0, 18.8, and 21.2 mg/g, respectively. The cold-sintered as-spent aluminosilicate sorbent formed a dense monolith (density = 2.05 × 103 kg/m3 with a microhardness value of 3 ± 0.3 GPa). Pressure-induced consolidation of the amorphous phase and dehydration of the structurally bound water are attributed to the cold sintering mechanism. The normalized leaching rates through a 7-day product consistency test for cesium/cobalt/nickel-ions are 5.18 × 10−7, 6.27 × 10−6, and 3.25 × 10−6 g∙m−2∙d−1, respectively, much lower than crystalline aluminosilicates and other immobilization matrices. Furthermore, the measured leachability indices for all target ions and sodium, as per the American National Standards Institute/American Nuclear Society 16.1 (ANSI/ANS 16.1) for 90 days, are the highest value among other immobilization processes. To our best knowledge, the results present the first example of cold-immobilized used amorphous aluminosilicate sorbents, with a unique benefit of avoiding volatile radio-nuclides loss. © 2021 Elsevier B.V.-
dc.languageEnglish-
dc.publisherELSEVIER-
dc.titleDual functional amorphous aluminosilicate sorbents for removing and cold-immobilizing cesium/cobalt/nickel-ions-
dc.typeArticle-
dc.identifier.wosid000744243700001-
dc.identifier.scopusid2-s2.0-85119358800-
dc.type.rimsART-
dc.citation.volume30-
dc.citation.publicationnameSUSTAINABLE MATERIALS AND TECHNOLOGIES-
dc.identifier.doi10.1016/j.susmat.2021.e00356-
dc.contributor.localauthorRyu, Ho Jin-
dc.contributor.nonIdAuthorLee, S-
dc.contributor.nonIdAuthorHassan, MU-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorAdsorption-
dc.subject.keywordAuthorCold sintering-
dc.subject.keywordAuthorDirect cold immobilization-
dc.subject.keywordAuthorHigh leaching resistance-
dc.subject.keywordAuthorRadionuclides-
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