New type of amidoxime-group-containing adsorbent for the recovery of uranium from seawater. III. Recycle use of adsorbent
An amidoxime-group adsorbent for recovering uranium from seawater was made by radiation-induced graft polymerization of acrylonitrile onto polymeric fiber, followed by amidoximation. Uranium adsorption of the adsorbent contacted with seawater in a column increased with the increase in flow rate, then leveled off. The relationship between uranium adsorption in a batch process and the ratio of the amount of seawater to that of adsorbent was found to be effective in evaluating adsorbent contacted with any amount of seawater. The conditioning of the adsorbent with an alkaline solution at higher temperature (approx.80/sup 0/C) after the acid desorption recovered the adsorption ability to the original level. This made it possible to apply the adsorbent to recycle use. On the other hand, the adsorbent conditioned at room temperature or that without conditioning lost adsorption ability during recycle use. The increase in water uptake was observed as one of the physical changes produced during recycle use of the alkaline-conditioned adsorbent, while the decrease in water uptake was observed with the unconditioned adsorbent. The IR spectra of the adsorbent showed a probability of reactions of amidoxime groups with acid and alkaline solutions, which can explain the change in uranium adsorption during the adsorption-desorption cycle.
- Research Organization:
- Japan Atomic Energy Research Institute, Gunma
- OSTI ID:
- 6809078
- Journal Information:
- Sep. Sci. Technol.; (United States), Vol. 21:6-7
- Country of Publication:
- United States
- Language:
- English
Similar Records
Enhancing Uranium Uptake by Amidoxime Adsorbent in Seawater: An investigation for optimum alkaline conditioning parameters
Enhancing uranium uptake by amidoxime adsorbent in seawater: An investigation for optimum alkaline conditioning parameters
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
ADSORBENTS
PERFORMANCE
AMIDES
SORPTIVE PROPERTIES
OXIMES
SEAWATER
PURIFICATION
URANIUM
ADSORPTION
BASES
DESORPTION
EXPERIMENTAL DATA
INFRARED SPECTRA
INORGANIC ACIDS
MATERIALS RECOVERY
PH VALUE
SEPARATION PROCESSES
ACTINIDES
AMINES
DATA
ELEMENTS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
MANAGEMENT
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
SORPTION
SPECTRA
SURFACE PROPERTIES
WASTE MANAGEMENT
WASTE PROCESSING
WATER
400105* - Separation Procedures
520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)
400702 - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials