Electrochemical evaluation of selenium (IV) removal from its aqueous solutions by unmodified and modified graphene oxide

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dc.contributor.authorKoudelková, Zuzanacs
dc.contributor.authorBytešníková, Zuzanacs
dc.contributor.authorXhaxhiu, Kledics
dc.contributor.authorKremplová, Monikacs
dc.contributor.authorHynek, Davidcs
dc.contributor.authorAdam, Vojtěchcs
dc.contributor.authorRichtera, Lukášcs
dc.coverage.issue6cs
dc.coverage.volume24cs
dc.date.accessioned2020-08-04T11:03:43Z
dc.date.available2020-08-04T11:03:43Z
dc.date.issued2019-03-02cs
dc.description.abstractThe removal of selenium from superficial and waste water is a worldwide problem. The maximum limit according to the World Health Organization (WHO) for the selenium in the water is set at a concentration of 10 g/L. Carbon based adsorbents have attracted much attention and recently demonstrated promising performance in removal of selenium. In this work, several materials (iron oxide based microparticles and graphene oxides materials) and their composites were prepared to remove Se(IV) from water. The graphene oxides were prepared according to the simplified Hummer's method. In addition, the effect of pH, contact time and initial Se(IV) concentration was tested. An electrochemical method such as the differential pulse cathodic stripping voltammetry was used to determine the residual selenium concentration. From the experimental data, Langmuir adsorption model was used to calculate the maximum adsorption capacity. Graphene oxide particles modified by iron oxide based microparticles was the most promising material for the removal of Se(IV) from its aqueous solution at pH 2.0. Its adsorption efficiency reached more than 90% for a solution with given Se(IV) concentration, meanwhile its maximal recorded adsorption capacity was 18.69 mg/g.en
dc.formattextcs
dc.format.extent1-13cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMOLECULES. 2019, vol. 24, issue 6, p. 1-13.en
dc.identifier.doi10.3390/molecules24061063cs
dc.identifier.issn1420-3049cs
dc.identifier.other156772cs
dc.identifier.urihttp://hdl.handle.net/11012/180501
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofMOLECULEScs
dc.relation.urihttp://www.mdpi.com/1420-3049/24/6/1063cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1420-3049/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectselenium removalen
dc.subjectgraphene oxideen
dc.subjectwater purificationen
dc.subjectelectrochemistryen
dc.subjectdifferential pulse cathodic stripping voltammetryen
dc.titleElectrochemical evaluation of selenium (IV) removal from its aqueous solutions by unmodified and modified graphene oxideen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-156772en
sync.item.dbtypeVAVen
sync.item.insts2020.08.04 13:03:43en
sync.item.modts2020.08.04 12:27:09en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Chytré nanonástrojecs
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