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Author Han, H. ♦ Kaur, M. ♦ Qiang, Y. ♦ Johnson, A. ♦ Paszczynski, A. ♦ Kaczor, J.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NANOSCIENCE AND NANOTECHNOLOGY ♦ MATERIALS SCIENCE ♦ ACTINIDES ♦ AGGLOMERATION ♦ CHELATING AGENTS ♦ COATINGS ♦ COVALENCE ♦ IRON OXIDES ♦ LEACHING ♦ MAGNETIC MATERIALS ♦ MAGNETIZATION ♦ MANGANESE PHOSPHIDES ♦ NANOSTRUCTURES ♦ PARTICLES ♦ RADIOACTIVE WASTE PROCESSING ♦ SILICA ♦ SURFACE COATING ♦ CHALCOGENIDES ♦ DEPOSITION ♦ DISSOLUTION ♦ ELEMENTS ♦ IRON COMPOUNDS ♦ MANAGEMENT ♦ MANGANESE COMPOUNDS ♦ MATERIALS ♦ METALS ♦ MINERALS ♦ OXIDE MINERALS ♦ OXIDES ♦ OXYGEN COMPOUNDS ♦ PHOSPHIDES ♦ PHOSPHORUS COMPOUNDS ♦ PNICTIDES ♦ PROCESSING ♦ RADIOACTIVE WASTE MANAGEMENT ♦ SEPARATION PROCESSES ♦ TRANSITION ELEMENT COMPOUNDS ♦ WASTE MANAGEMENT ♦ WASTE PROCESSING
Abstract Fe{sub 2}O{sub 3} magnetic nanoparticles (MNPs) have been coated with silica, followed by covalent attachment of the actinide specific chelators to separate nuclear waste in acidic conditions. A general model is developed to relate the surface coating to the particle's magnetization change, providing an alternative way to characterize the size-distribution/aggregation of MNPs. The optimized silica coating protects the Fe{sub 2}O{sub 3} MNPs from iron leaching under highly acidic conditions, facilitates the dispersion of MNPs, and dramatically increases the loading capacity of chelator onto the MNPs. Compared with the uncoated counterparts, the silica coated MNPs show enhanced actinide separation efficiency.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2010-05-15
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 107
Issue Number 9


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