DC Field | Value | Language |
---|---|---|
dc.contributor.author | Sihn, Young Ho | ko |
dc.contributor.author | Bae, Sungjun | ko |
dc.contributor.author | Lee, Woojin | ko |
dc.date.accessioned | 2018-12-20T06:48:54Z | - |
dc.date.available | 2018-12-20T06:48:54Z | - |
dc.date.created | 2018-12-12 | - |
dc.date.created | 2018-12-12 | - |
dc.date.issued | 2019-01 | - |
dc.identifier.citation | CHEMOSPHERE, v.215, pp.626 - 633 | - |
dc.identifier.issn | 0045-6535 | - |
dc.identifier.uri | http://hdl.handle.net/10203/248232 | - |
dc.description.abstract | We developed a novel solidification and stabilization process using a nanoscale zerovalent iron (NZVI)cement system for reductive immobilization of hexavalent uranium (U(VI)) in a soil-cement matrix. The NZVI suspension without cement demonstrated high removal efficiency (100% in 2 h) and fast removal kinetics (53.7 Lm(-2) d(-1)), which surpassed those of other Fe-containing minerals (i.e., green rust, mackinawite, magnetite, and pyrite). Significant removal of aqueous U(VI) was observed in NZVI-cement slurries and minimal adsorbed U was desorbed by a bicarbonate/carbonate (CARB) solution. Surface analysis using scanning electron microscopy and X-ray photoelectron spectroscopy revealed U distributed homogeneously on the surface of the NZVI-cement and transformed considerably from U(VI) to reduced U species by coupled oxidation of Fe(0)/Fe(II) to Fe(III). Furthermore, the increase in pH and NZVI concentration, and presence of humic acid resulted in the enhanced U(VI) reduction in NZVI-cement slurries. The NZVI-cement system was tested with a soil matrix, resulting in successful immobilization of aqueous U(VI) in both batch and column experiments. Moreover, the U(VI) removed in the NZVI-cement system was not leached out by the CARB solution during long-term experiments. The results suggest an NZVI-cement system could represent a promising remediation alternative for effective and stable immobilization of U(VI) in contaminated sites. (C) 2018 Elsevier Ltd. All rights reserved. | - |
dc.language | English | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | Immobilization of uranium(VI) in a cementitious matrix with nanoscale zerovalent iron (NZVI) | - |
dc.type | Article | - |
dc.identifier.wosid | 000450383400069 | - |
dc.identifier.scopusid | 2-s2.0-85056003236 | - |
dc.type.rims | ART | - |
dc.citation.volume | 215 | - |
dc.citation.beginningpage | 626 | - |
dc.citation.endingpage | 633 | - |
dc.citation.publicationname | CHEMOSPHERE | - |
dc.identifier.doi | 10.1016/j.chemosphere.2018.10.073 | - |
dc.contributor.nonIdAuthor | Bae, Sungjun | - |
dc.contributor.nonIdAuthor | Lee, Woojin | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Uranium | - |
dc.subject.keywordAuthor | Solidification | - |
dc.subject.keywordAuthor | Stabilization | - |
dc.subject.keywordAuthor | Nanoscale zerovalent iron | - |
dc.subject.keywordAuthor | Cement | - |
dc.subject.keywordPlus | ZERO-VALENT IRON | - |
dc.subject.keywordPlus | REDUCTIVE DECHLORINATION | - |
dc.subject.keywordPlus | HUMIC-ACID | - |
dc.subject.keywordPlus | DEGRADATION | - |
dc.subject.keywordPlus | MAGNETITE | - |
dc.subject.keywordPlus | REMOVAL | - |
dc.subject.keywordPlus | REACTIVITY | - |
dc.subject.keywordPlus | MECHANISM | - |
dc.subject.keywordPlus | KINETICS | - |
dc.subject.keywordPlus | SLURRIES | - |
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