Removal of radioactive cesium from an aqueous solution via bioaccumulation by microalgae and magnetic separation

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dc.contributor.authorKim, Ilgookko
dc.contributor.authorYang, Hee-Manko
dc.contributor.authorPark, Chan Wooko
dc.contributor.authorYoon, In-Hoko
dc.contributor.authorSeo, Bum-Kyoungko
dc.contributor.authorKim, Eun-Kyungko
dc.contributor.authorRyu, Byung-Gonko
dc.date.accessioned2019-07-29T06:20:47Z-
dc.date.available2019-07-29T06:20:47Z-
dc.date.created2019-07-29-
dc.date.created2019-07-29-
dc.date.issued2019-07-
dc.identifier.citationSCIENTIFIC REPORTS, v.9-
dc.identifier.issn2045-2322-
dc.identifier.urihttp://hdl.handle.net/10203/263879-
dc.description.abstractWe evaluated the potential sequestration of cesium (Cs+) by microalgae under heterotrophic growth conditions in an attempt to ultimately develop a system for treatment of radioactive wastewater. Thus, we examined the effects of initial Cs+ concentration (100-500 mu M), pH (5-9), K+ and Na+ concentrations (0-20 mg/L), and different organic carbon sources (acetate, glycerol, glucose) on Cs+ removal. Our initial comparison of nine microalgae indicated that Desmodesmus armatus SCK had removed the most Cs+ under various environmental conditions. Addition of organic substrates significantly enhanced Cs+ uptake by D. armatus, even in the presence of a competitive cation (K+). We also applied magnetic nanoparticles coated with a cationic polymer (polyethylenimine) to separate Cs-137-containing microalgal biomass under a magnetic field. Our technique of combining bioaccumulation and magnetic separation successfully removed more than 90% of the radioactive Cs-137 from an aqueous medium. These results clearly demonstrate that the method described here is a promising bioremediation technique for treatment of radioactive liquid waste.-
dc.languageEnglish-
dc.publisherNATURE PUBLISHING GROUP-
dc.titleRemoval of radioactive cesium from an aqueous solution via bioaccumulation by microalgae and magnetic separation-
dc.typeArticle-
dc.identifier.wosid000475293700001-
dc.identifier.scopusid2-s2.0-85068905471-
dc.type.rimsART-
dc.citation.volume9-
dc.citation.publicationnameSCIENTIFIC REPORTS-
dc.identifier.doi10.1038/s41598-019-46586-x-
dc.contributor.localauthorKim, Eun-Kyung-
dc.contributor.nonIdAuthorKim, Ilgook-
dc.contributor.nonIdAuthorYang, Hee-Man-
dc.contributor.nonIdAuthorPark, Chan Woo-
dc.contributor.nonIdAuthorYoon, In-Ho-
dc.contributor.nonIdAuthorSeo, Bum-Kyoung-
dc.contributor.nonIdAuthorRyu, Byung-Gon-
dc.description.isOpenAccessY-
dc.type.journalArticleArticle-
dc.subject.keywordPlusACCUMULATION-
dc.subject.keywordPlusMECHANISMS-
dc.subject.keywordPlusPOTASSIUM-
dc.subject.keywordPlusTRANSPORT-
dc.subject.keywordPlusRECOVERY-
dc.subject.keywordPlusALGAE-
dc.subject.keywordPlusWATER-
dc.subject.keywordPlusCS-
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