New type of Amidoxime-group-containing absorbent for the recovery of uranium from seawater. II. Effect of grafting of hydrophilic monomers
A fibrous adsorbent containing amidoxime groups (AOF) for recovering uranium from seawater was synthesized by the radiation-induced grafting of acrylonitrile (AN) to a fiber followed by the amidoximation of cyano groups of poly(AN) graft chains. When such hydrophilic monomers as N,N-dimethyl-acrylamide (DMAAm) and acrylic acid (AAc) were preliminarily grafted, both the water uptake and the mobility of the sorbed water in AOF were improved in the order: AOF-containing poly-(DMAAm) graft chains (AOF-DMAAm) > AOF-containing poly(AAc) graft chains (AOF-AAc) > AOF without hydrophilic graft chains. The uranium uptake with these adsorbents was, on the other hand, in the order: AOF-AAc > AOF-DMAAm > AOF. The adsorption of alkaline earths was related to the distribution pattern of poly(AAc) graft chains inside the fiber. The adsorbed alkaline earths were eliminated from the adsorbent fiber by introducing a solution of heavy metal ions such as Cu/sup 2 +/.
- Research Organization:
- Japan Atomic Energy Research Institute, Takasaki
- OSTI ID:
- 5392084
- Journal Information:
- Sep. Sci. Technol.; (United States), Vol. 21:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
AMIDES
SORPTIVE PROPERTIES
GRAFT POLYMERS
OXIMES
URANIUM
ADSORPTION
EXPERIMENTAL DATA
SEAWATER
ACTINIDES
AMINES
DATA
ELEMENTS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLYMERS
SORPTION
SURFACE PROPERTIES
WATER
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