Testing iodized activated carbon filters with non-radioactive methyl iodide. Final report

Technical Report · Fri May 30 04:00:00 EDT 1980

OSTI ID:6429756

Deitz, V R; Romans, J B

Iodized carbons, impregnated with KIx(KI + xI2), were evaluated for trapping methyl iodide-127. In this method the complete effluent of the carbon is sampled and analyzed continuously. In contrast, the RDT-M16 test procedure counts the carbon and the back-up beds for the accumulated 131 species and no information is obtained for the interaction of the large amount of carrier methyl iodide-127 with the iodized charcoal. The test apparatus to measure the penetration of methyl iodide-127 is described and the calibration procedures are detailed. Results are given for the penetration of methyl iodide-127 through new activated carbons, carbons in service, and exhausted carbons withdrawn from service. The reduction in trapping efficiency with service is accompanied by the development of a maximum in the concentration of methyl iodide-127 during the air purge after the dose period. This behavior has escaped notice with methyl iodide-131 due to the way that test is made. The chromatographic holdup of methyl iodide-127 by carbons in service, together with the subsequent slow desorption step, could result in a dilution of the penetration iodine to acceptable levels under some conditions encountered in plant filter operations.

• Research Organization: Naval Research Lab., Washington, DC (USA)
• OSTI ID: 6429756
• Report Number(s): AD-A-088666
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
ACTIVATED CARBON
ADSORBENTS
ADSORPTION
AIR
AIR FILTERS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON
CHROMATOGRAPHY
DAYS LIVING RADIOISOTOPES
DESORPTION
ELEMENTS
EMISSION SPECTRA
EQUIPMENT
FILTERS
FLUIDS
GAS CHROMATOGRAPHY
GASEOUS WASTES
GASES
HALIDES
HALOGEN COMPOUNDS
HALOGENATED ALIPHATIC HYDROCARBONS
INTERMEDIATE MASS NUCLEI
IODIDES
IODINATED ALIPHATIC HYDROCARBONS
IODINE 127
IODINE 131
IODINE COMPOUNDS
IODINE ISOTOPES
ISOTOPES
MANAGEMENT
METHYL IODIDE
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC IODINE COMPOUNDS
PERFORMANCE TESTING
POLLUTION CONTROL EQUIPMENT
PROCESSING
RADIOACTIVE WASTE PROCESSING
RADIOISOTOPES
REMOVAL
SEPARATION PROCESSES
SORPTION
SPECTRA
STABLE ISOTOPES
TESTING
WASTE MANAGEMENT
WASTE PROCESSING
WASTES