Polymer-based separations: Synthesis and application of polymers for ionic and molecular recognition. Annual performance report, August 1, 1993--July 31, 1994
During this period, focus was on design and synthesis of bifunctional polymers for complexing metal ions from aqueous solutions; this could provide a means for separating radioactive and toxic metal ions from contaminated waste water as well as valuable metals from dilute ore processing streams. The synthesis of bifunctional polymers required a new preparative technique; bifunctional interpenetrating polymer networks (IPN) was an important part of the studies. In the preparation, a pre-formed crosslinked polymer is contacted with a solution of monomers, and a second network was polymerized within the first. Imidazole ligands were used. A new resin, prepared with a macrocyclic sorbed within polystyrene beads modified with sulfonic acid ligands, extracted Cu(II) 10--100-fold. Maximum metal ion complexation rates depend on a balance between chemical interactions and physical parameters (matrix porosity, rigidity). A novel ion exchange resin (Diphonix{trademark}) has been produced which displays both ionic selectivity (diphosphonic acid ligands) and rapid complexation rates (sulfonic acid ligands).
- Research Organization:
- Tennessee Univ., Knoxville, TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG05-86ER13591
- OSTI ID:
- 10173307
- Report Number(s):
- DOE/ER/13591--8; ON: DE94016427; BR: KC0302020
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105
CHELATING AGENTS
ION EXCHANGE MATERIALS
LIGANDS
MATRIX MATERIALS
PHOSPHONIC ACIDS
POLYMERS
PROGRESS REPORT
RESINS
SEPARATION PROCEDURES
SULFONIC ACIDS
SYNERGISM
WASTE PROCESSING