Radionuclide Removal from Radioactively Contaminated Drainage Water and Groundwater by Precipitation and Sorption Methods

摘要

The possibility of using precipitation and sorption methods for removing artificial radionuclides from drainage water and groundwater on radiochemical production sites was examined. Chemical treatment of drainage water and groundwater (by sodium carbonate softening and phosphate precipitation) allows the specific activity to be decreased by a factor of 15-70. Depending on the chemical treatment procedure, from 2 to 6 kg m~(-3) of dry slime with the specific activity of up to 1 × 10~8 Bq kg~(-1) is formed. Chemical treatment of drainage water and groundwater allows the specific activity of solutions to be decreased to the level lower than the minimal significant specific activity, so that the purified water passes from the category of liquid radioactive wastes to the category of industrial wastes contaminated with artificial radionuclides.