Naonori Matsusaka

Availability of Zeolite as an Eliminant for the Incorporated Radionuclides. (2). In vitro Adsorption Property of Zeolite for 54Mn.

ゼオライトの54Mnの吸着に対する溶液中のマンガン濃度ならびに共存金属イオンの影響についてin vitroで検討した。ゼオライトはそのイオン交換容量の範囲内では, 塩化マンガン溶液中の54Mnをほぼ完全に吸着した。また54Mnの吸着は, カルシウム, 鉄 (II) , 銅, 亜鉛, ストロンチウム, セシウム, セリウムでは強く抑制されたが, マグネシウム, ナトリウム, カリウムではあまり影響されなかった。

Availability of Zeolite as an Eliminator for the Incorporated Radionuclides. Effect on the biological half-life of 54Mn and 65Zn.

In order to estimate the availability of zeolite, one of the inorganic ion exchangers, as an eliminator for the incorporated radionuclides, wholebody retention of intraperitoneally administrated 54Mn and 65Zn was measured in mice fed a zeolite-added diet at 10 per cent. Wholebody retention of 54Mn and 65Zn was decreased significantly faster than control, and the biological half-life of them was also reduced to 11.3 and 12.7 days, respectively, from 14.1 and 16.8 days in controls. The results suggest that oral administration of zeolite is effective to eliminate the incorporated 54Mn and 65Zn, and if it is used in combination with the chelation therapy of DTPA, it will be more effective.