Scrubbing of iodine from gas streams with mercuric nitrate-conversion of mercuric iodate product to barium iodate for fixation in concrete

Technical Report · Sun Jun 01 00:00:00 EDT 1980

DOI:https://doi.org/10.2172/5449097· OSTI ID:5449097

Rogers, G. C.; Moore, J. G.; Morgan, M. T.

A bench-scale model of a mercuric nitrate scrubber for removal of iodine from off-gas streams was constructed and operated in conjunction with a mercuric iodate-to-barium iodate conversion system to determine the feasibility of total recycle of all processing solutions. The two main aspects of the system examined were (1) the extent of contamination of the barium iodate product, and (2) the effect of cross-contamination of various process solutions on the efficiency of the process. The experimental evidence obtained indicates that, with appropriate control, all solutions can be recycled without significant contamination of the product that would be harmful to the host concrete or to the environment. Mercury contamination was found to be less than or equal to 0.5 wt % of the barium iodate product. The most significant effect on system efficiency was determined to be barium hydroxide contamination of the sodium hydroxide solution used to convert mercuric iodate to sodium iodate. A mole ratio of barium hydroxide to sodium hydroxide of about 1:225 caused a decrease in conversion efficiency of about 45%.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5449097
• Report Number(s): ORNL/TM-7102
• Country of Publication: United States
• Language: English

Related Subjects

052001* -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM HYDROXIDES
BUILDING MATERIALS
CONCRETES
ELEMENTS
EQUIPMENT
GASEOUS WASTES
HALOGEN COMPOUNDS
HALOGENS
HYDROGEN COMPOUNDS
HYDROXIDES
INORGANIC ACIDS
IODATES
IODINE
IODINE COMPOUNDS
MANAGEMENT
MATERIALS
MERCURY COMPOUNDS
MERCURY NITRATES
NITRATES
NITRIC ACID
NITROGEN COMPOUNDS
NONMETALS
OFF-GAS SYSTEMS
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
PROCESSING
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE PROCESSING
REMOVAL
SCRUBBERS
SCRUBBING
SODIUM COMPOUNDS
SODIUM HYDROXIDES
WASTE DISPOSAL
WASTE MANAGEMENT
WASTE PROCESSING
WASTES