Highly Defective UiO-66 Materials for the Adsorptive Removal of Perfluorooctanesulfonate

Simple item page
dc.citation.firstpage6619en_US
dc.citation.issueNumber7en_US
dc.citation.journalTitleACS Sustainable Chemistry & Engineeringen_US
dc.citation.lastpage6628en_US
dc.citation.volumeNumber7en_US
dc.contributor.authorClark, Chelsea A.en_US
dc.contributor.authorHeck, Kimberly N.en_US
dc.contributor.authorPowell, Camilah D.en_US
dc.contributor.authorWong, Michael S.en_US
dc.contributor.orgNanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatmenten_US
dc.date.accessioned2019-08-28T15:02:59Zen_US
dc.date.available2019-08-28T15:02:59Zen_US
dc.date.issued2019en_US
dc.description.abstractPerfluorooctanesulfonate (PFOS) is a persistent organic pollutant that is bioaccumulative and toxic. While its use in most countries has been restricted to certain industrial applications due to environmental and health concerns, chrome plating and semiconductor manufacturing facilities are industrial point sources of PFOS-containing wastewater. Current remediation technologies are ineffective at treating these highly concentrated industrial effluents. In this work, UiO-66 metal–organic frameworks (MOFs) of several defect concentrations were studied as sorbents for the removal of PFOS from concentrated aqueous solutions. PFOS sorption isotherms indicated that defective UiO-66, prepared with HCl as a modulator, had a maximum Langmuir sorption capacity of 1.24 mmol/g, which was ∼2× greater than powdered activated carbon (PAC), but ∼2× less than that of a commercial ion-exchange resin. Defective UiO-66 adsorbed PFOS 2 orders of magnitude faster than the ion-exchange resin. Large pore defects (∼16 and ∼20 Å) within the framework were critical to the increased adsorption capacity due to higher internal surface area and an increased number of coordinatively unsaturated Zr sites to bind the PFOS head groups. Of the common co-contaminants in chrome plating wastewaters, chloride ions have a negligible effect on PFOS sorption, while sulfate and hexavalent chromium anions compete for cationically charged adsorption sites. These materials were also effective adsorbents for the shorter-chain homologue, perfluorobutanesulfonate (PFBS). The enhanced PFOS and PFBS adsorptive properties of UiO-66 highlight the advantage of structurally defective MOFs as a water treatment approach toward environmental sustainability.en_US
dc.identifier.citationClark, Chelsea A., Heck, Kimberly N., Powell, Camilah D., et al.. "Highly Defective UiO-66 Materials for the Adsorptive Removal of Perfluorooctanesulfonate." <i>ACS Sustainable Chemistry & Engineering,</i> 7, no. 7 (2019) American Chemical Society: 6619-6628. https://doi.org/10.1021/acssuschemeng.8b05572.en_US
dc.identifier.doihttps://doi.org/10.1021/acssuschemeng.8b05572en_US
dc.identifier.urihttps://hdl.handle.net/1911/107362en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.en_US
dc.subject.keywordUiO-66en_US
dc.subject.keywordMetal−organic frameworksen_US
dc.subject.keywordPerfluoroalkyl substanceen_US
dc.subject.keywordPerfluorooctanesulfonateen_US
dc.subject.keywordPerfluorobutanesulfonateen_US
dc.subject.keywordAdsorptionen_US
dc.subject.keywordDefecten_US
dc.titleHighly Defective UiO-66 Materials for the Adsorptive Removal of Perfluorooctanesulfonateen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
UiO-66-PFOS-Adsorption.pdf
Size:
1.21 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Faculty Publications
Chemical and Biomolecular Engineering Publications
Chemistry Publications
Civil and Environmental Engineering Publications
Materials Science and NanoEngineering Publications