264234 Removal of Radioactive Iodine Species by Solid Sorbents

Thursday, November 1, 2012: 3:35 PM
305 (Convention Center )
Ronghong Lin and Lawrence L. Tavlarides, Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY

Iodine-129 is one of several radioactive iodine isotopes formed in fission reactions and it has a very long half-life of 16×106 years. A variety of iodine-129 species are present in off-gases from spent nuclear fuel reprocessing facilities including I2, CH3I, HI, higher molecular weight alkyl iodides, and others. Removal and immobilization of these species is one of a number of critical barriers to nuclear waste treatment. The current study will develop predictive models for simulating dynamic adsorption processes, and the results will be used to provide recommendations on a path forward for the development of sorbents and sorption processes for off-gas treatment. In this presentation, we will discuss the development of a continuous flow adsorption system which is being applied to study single-pellet adsorption dynamics. Kinetics of I2 adsorption by silver-exchanged mordenite will be discussed.  Also, experimental studies on adsorption of various iodine species (I2, CH3I, C2H5I, etc.) by a number of sorbents (silver-exchanged mordenite, ZIF-8, etc.) will be discussed, and preliminary adsorption equilibrium data will be presented.

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