A systematic study of hexavalent chromium adsorption and removal from aqueous environments using chemically functionalized amorphous and mesoporous silica nanoparticles
DC Field | Value | Language |
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dc.contributor.author | Jang, Eun-Hye | - |
dc.contributor.author | Pack, Seung Pil | - |
dc.contributor.author | Kim, Il | - |
dc.contributor.author | Chung, Sungwook | - |
dc.date.accessioned | 2021-08-31T05:59:20Z | - |
dc.date.available | 2021-08-31T05:59:20Z | - |
dc.date.created | 2021-06-18 | - |
dc.date.issued | 2020-03-27 | - |
dc.identifier.issn | 2045-2322 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/57216 | - |
dc.description.abstract | We report on the synthesis and characterization of highly monodisperse amorphous silica nanoparticles (ASNs) and mesoporous silica nanoparticles (MSNs) with particle sizes of 15-60nm. We demonstrate adsorption of Cr(VI) ions on amino-functionalized ASNs (NH2-ASNs) and MSNs (NH2-MSNs) and their removal from aqueous environments and show the specific surface area (SSA) of NH2-MSNs is four times as larger as that of NH2-ASNs and that more than 70% of the total SSA of NH2-MSNs is due to the presence of nanopores. Analyses of Cr(VI) adsorption kinetics on NH2-ASNs and NH2-MSNs exhibited relatively rapid adsorption behavior following pseudo-second order kinetics as determined by nonlinear fitting. NH2-ASNs and NH2-MSNs exhibited significantly higher Cr(VI) adsorption capacities of 34.0 and 42.2mg.g(-1) and removal efficiencies of 61.9 and 76.8% than those of unfunctionalized ASNs and MSNs, respectively. The Langmuir model resulted in best fits to the adsorption isotherms of NH2-ASNs and NH2-MSNs. The adsorption of Cr(VI) on NH2-ASNs and NH2-MSNs was an endothermic and spontaneous process according to the thermodynamic analyses of temperature-dependent adsorption isotherms. The removal efficiencies of NH2-ASNs and NH2-MSNs exhibited a moderate reduction of less than 25% of the maximum values after five regeneration cycles. Furthermore, NH2-MSNs were also found to reduce adsorbed Cr(VI) into less harmful Cr(III). | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | NATURE RESEARCH | - |
dc.subject | ELECTROPLATING WASTE-WATER | - |
dc.subject | ACTIVATED CARBONS | - |
dc.subject | FACILE SYNTHESIS | - |
dc.subject | KINETIC-MODELS | - |
dc.subject | CR(VI) | - |
dc.subject | ADSORBENTS | - |
dc.subject | REDUCTION | - |
dc.subject | SORPTION | - |
dc.subject | SURFACE | - |
dc.subject | MCM-41 | - |
dc.title | A systematic study of hexavalent chromium adsorption and removal from aqueous environments using chemically functionalized amorphous and mesoporous silica nanoparticles | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Pack, Seung Pil | - |
dc.identifier.doi | 10.1038/s41598-020-61505-1 | - |
dc.identifier.scopusid | 2-s2.0-85082521190 | - |
dc.identifier.wosid | 000560406800006 | - |
dc.identifier.bibliographicCitation | SCIENTIFIC REPORTS, v.10, no.1 | - |
dc.relation.isPartOf | SCIENTIFIC REPORTS | - |
dc.citation.title | SCIENTIFIC REPORTS | - |
dc.citation.volume | 10 | - |
dc.citation.number | 1 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalWebOfScienceCategory | Multidisciplinary Sciences | - |
dc.subject.keywordPlus | ELECTROPLATING WASTE-WATER | - |
dc.subject.keywordPlus | ACTIVATED CARBONS | - |
dc.subject.keywordPlus | FACILE SYNTHESIS | - |
dc.subject.keywordPlus | KINETIC-MODELS | - |
dc.subject.keywordPlus | CR(VI) | - |
dc.subject.keywordPlus | ADSORBENTS | - |
dc.subject.keywordPlus | REDUCTION | - |
dc.subject.keywordPlus | SORPTION | - |
dc.subject.keywordPlus | SURFACE | - |
dc.subject.keywordPlus | MCM-41 | - |
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