title: Selective removal of cesium and strontium using porous frameworks from high level nuclear waste.
abstract: Efficient and cost-effective removal of radioactive (137)Cs and (90)Sr found in spent fuel is an important step for safe, long-term storage of nuclear waste. Solid-state materials such as resins and titanosilicate zeolites have been assessed for the removal of Cs and Sr from aqueous solutions, but there is room for improvement in terms of capacity and selectivity. Herein, we report the Cs(+) and Sr(2+) exchange potential of an ultra stable MOF, namely, MIL-101-SO3H, as a function of different contact times, concentrations, pH levels, and in the presence of competing ions. Our preliminary results suggest that MOFs with suitable ion exchange groups can be promising alternate materials for cesium and strontium removal.
authors.affiliation: Physical and Computational Science Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, USA. Praveen.thallapally@pnnl.gov.
authors.forename: Briana
authors.initials: B
authors.lastname: Aguila
authors.forename: Debasis
authors.initials: D
authors.lastname: Banerjee
authors.forename: Zimin
authors.initials: Z
authors.lastname: Nie
authors.forename: Yongsoon
authors.initials: Y
authors.lastname: Shin
authors.forename: Shengqian
authors.initials: S
authors.lastname: Ma
authors.forename: Praveen K
authors.initials: PK
authors.lastname: Thallapally
mesh_terms: D002586:Cesium / Q000737:chemistry* / Q000302:isolation & purification*; D056831:Coordination Complexes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D000073396:Metal-Organic Frameworks; D016062:Porosity; D011850:Radioactive Waste; D013324:Strontium / Q000737:chemistry* / Q000302:isolation & purification*; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D056831:Coordination Complexes; C000589635:MIL-101; D000073396:Metal-Organic Frameworks; D011850:Radioactive Waste; D014867:Water; D002586:Cesium; D013324:Strontium