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Abstract
Styrene-acrylonitrile copolymer was synthesized by emulsion polymerization using persulphate as the radical initiator. The polymer obtained was functionalized by reacting with hydroxylamine to convert the nitrile group into amidoxime. The amidoxime sorbent was characterized in terms of moisture uptake elemental composition, IR spectra, thermal stability and exchange capacity. The sorbent, obtained in particulate form, was investigated for its sorption properties with respect to uranium from uranyl nitrate solution in batch as well as in column conditions. This paper will present the preparation, characterization and performance evaluation with respect to uranium sorption as a function of contact time, uranium concentration, and temperature. The effect of excess sodium chloride and free dissolved chlorine on uranium uptake are also included. The potential of the sorbent for uranium recovery and other heavy metal from sea water is ascertained.
ACKNOWLEDGMENT
The authors wish to gratefully acknowledge Dr. Satya Brat of Process Development Division for arranging DTA/TGA spectra. Dr. V. Ramachandhran wishes to acknowledge the support of Dr. B. M. Misra, Head, Desalination Division and Mr. M. S. Hanra, Head, Separation Technology Section while carrying out this work.