Silica coated magnetic nanoparticles for separation of nuclear acidic waste

Journal Article · Sat May 15 00:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3358612· OSTI ID:21476214

Han, H; Kaur, M; Qiang, Y ^[1]; Johnson, A; Paszczynski, A ^[2]; Kaczor, J ^[2]

---

1. Department of Physics and Environmental Science, University of Idaho, Moscow, Idaho 83844 (United States)
2. Environmental Biotechnology Institute, Molecular Biology and Biochemistry, University of Idaho, Moscow, Idaho 83844 (United States)

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.

• OSTI ID: 21476214
• Journal Information: Journal of Applied Physics, Vol. 107, Issue 9; Conference: 11. joint MMM-Intermag conference, Washington, DC (United States), 18-22 Jan 2010; Other Information: DOI: 10.1063/1.3358612; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
36 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