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Anion-exchanged and quaternary ammonium functionalized MIL-101-Cr metal-organic framework (MOF) for ReO4-/TcO4- sequestration from groundwater.
Li, Dien; Shustova, Natalia B; Martin, Corey R; Taylor-Pashow, Kathryn; Seaman, John C; Kaplan, Daniel I; Amoroso, Jake W; Chernikov, Roman.
Afiliación
  • Li D; Savannah River National Laboratory, Aiken, SC, 29808, USA. Electronic address: Dien.Li@srs.gov.
  • Shustova NB; Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA.
  • Martin CR; Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA.
  • Taylor-Pashow K; Savannah River National Laboratory, Aiken, SC, 29808, USA.
  • Seaman JC; Savannah River Ecology Laboratory, University of Georgia, Aiken, SC, 29802, USA.
  • Kaplan DI; Savannah River National Laboratory, Aiken, SC, 29808, USA.
  • Amoroso JW; Savannah River National Laboratory, Aiken, SC, 29808, USA.
  • Chernikov R; Canadian Light Source, Saskatoon, SK, S7N 0X4, Canada.
J Environ Radioact ; 222: 106372, 2020 Oct.
Article en En | MEDLINE | ID: mdl-32771856
There are few effective technologies for the sequestration of highly water-soluble pertechnetate (TcO4-) from contaminated water despite the urgency of environmental and public health concerns. In this work, anion exchanged and cetyltrimethylammonium bromide (CTAB) functionalized MIL-101-Cr-NO3 were investigated for perrhenate (ReO4-), a surrogate of TcO4-, sequestration from artificial groundwater. Cl-, I-, and CF3SO3- exchanged MIL-101-Cr proved more effective at ReO4- removal than the parent MIL-101-Cr-F. Compared to the parent framework, CTAB functionalized MIL-101-Cr-NO3 increased ReO4- removal capacity from 39 to 139 mg/g, improved the reaction kinetics from ~30 to <10 min to reach full adsorption capacity and the selectivity for ReO4- over competing NO3-, CO32-, SO42-, and Cl-. Spectroscopic data indicated that the chemical speciation of Re in the exchanged MIL-101-Cr remained ReO4-, indicating synergistic sequestration through both anion exchange and non-ion exchange binding with the positively charged ligand of CTAB. These studies foreshadow potential applications of MOFs for the remediation of 99TcO4- from contaminated environments.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Agua Subterránea / Monitoreo de Radiación / Compuestos de Amonio / Estructuras Metalorgánicas Idioma: En Revista: J Environ Radioact Asunto de la revista: SAUDE AMBIENTAL Año: 2020 Tipo del documento: Article Pais de publicación: Reino Unido
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Agua Subterránea / Monitoreo de Radiación / Compuestos de Amonio / Estructuras Metalorgánicas Idioma: En Revista: J Environ Radioact Asunto de la revista: SAUDE AMBIENTAL Año: 2020 Tipo del documento: Article Pais de publicación: Reino Unido