FILTERING MATERIAL FOR FILTERING VENTILATION AND FILTERING VENTILATION DEVICE

摘要

FIELD: chemistry.;SUBSTANCE: group of inventions relates to the granular filter material. Filter material for filter ventilation contains granular L zeolite in order to absorb radioactive iodine in the presence of hydrogen, in which at least a part of the ion exchange centers of the L zeolite are replaced by silver, the composition ratio (a/b) of the amount (a) of ion exchange centers, which are substituted by silver, to the number (b) of ion exchange centers, which are not substituted by silver, preferably it is 25/75–55/45, the filtration material for the ventilation filtration of the present invention has an abrasion loss of 10 % or less. There is also a filter ventilation device.;EFFECT: group of inventions provides for more efficient absorption of radioactive iodine.;6 cl, 4 dwg, 8 tbl, 16 ex