DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kwon, Songhyeon | ko |
dc.contributor.author | Kim, Chaehoon | ko |
dc.contributor.author | Han, Eunhye | ko |
dc.contributor.author | Lee, Hoin | ko |
dc.contributor.author | Cho, Hae Sung | ko |
dc.contributor.author | Choi, Minkee | ko |
dc.date.accessioned | 2021-02-27T04:50:04Z | - |
dc.date.available | 2021-02-27T04:50:04Z | - |
dc.date.created | 2020-12-02 | - |
dc.date.created | 2020-12-02 | - |
dc.date.created | 2020-12-02 | - |
dc.date.issued | 2021-04 | - |
dc.identifier.citation | JOURNAL OF HAZARDOUS MATERIALS, v.408, pp.124419 | - |
dc.identifier.issn | 0304-3894 | - |
dc.identifier.uri | http://hdl.handle.net/10203/281069 | - |
dc.description.abstract | Zeolites are widely used for capturing radioactive Cs+ and Sr2+, but the important structural factors determining their performance have not been clearly understood. To investigate the structure-property relationship, we prepared thirteen zeolites with various structures and Si/Al ratios. Ion-exchange experiments revealed that Cs+ exhibited an enhanced affinity to zeolites with high Si/Al ratios, which could be explained by the dielectric theory. Notably, zeolites containing 8-membered ring (8MR) showed extra-high Cs+ selectivity. Structural analysis using X-ray diffraction proved that Cs+ with an ionic diameter of 3.6 Å was selectively coordinated within 8MR having a cavity diameter of 3.6–4.1 Å. Such unique size-selective Cs+ coordination is analogous to ion complexation by macrocyclic organic ligands (e.g., crown ethers). Divalent Sr2+ showed decreasing affinity to zeolites as the Si/Al ratio increased, because of the increasing average Al–Al distance distribution. Sr2+ exchange exhibited an insignificant dependence on zeolite structures due to its strong hydration, which inhibited close interaction with zeolite frameworks. In terms of kinetics, Sr2+ exchange was significantly slower than Cs+ exchange because of the bulkiness of hydrated Sr2+ ions. Therefore, the micropore channels with large apertures (e.g., 12-membered ring) were beneficial for achieving fast ion-exchange kinetics, especially in the case of Sr2+. | - |
dc.language | English | - |
dc.publisher | ELSEVIER | - |
dc.title | Relationship between zeolite structure and capture capability for radioactive cesium and strontium | - |
dc.type | Article | - |
dc.identifier.wosid | 000620390000007 | - |
dc.identifier.scopusid | 2-s2.0-85095791766 | - |
dc.type.rims | ART | - |
dc.citation.volume | 408 | - |
dc.citation.beginningpage | 124419 | - |
dc.citation.publicationname | JOURNAL OF HAZARDOUS MATERIALS | - |
dc.identifier.doi | 10.1016/j.jhazmat.2020.124419 | - |
dc.contributor.localauthor | Choi, Minkee | - |
dc.contributor.nonIdAuthor | Kwon, Songhyeon | - |
dc.contributor.nonIdAuthor | Han, Eunhye | - |
dc.contributor.nonIdAuthor | Lee, Hoin | - |
dc.contributor.nonIdAuthor | Cho, Hae Sung | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Cesium | - |
dc.subject.keywordAuthor | Ion exchange | - |
dc.subject.keywordAuthor | Strontium | - |
dc.subject.keywordAuthor | Structural dependence | - |
dc.subject.keywordAuthor | Zeolite | - |
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