| abstract |
A method for preparing a particulate form caesium-removal inorganic ion adsorbent, and a product and application thereof. Specifically, utilizing the principle in which a salt distributes as a monolayer on a surface of an oxide carrier, the X-ray diffraction method determines a monolayer distribution threshold of an M n+ ion salt on the surface of silica gel, and the threshold is treated as an optimal M n+ ion salt load. In the preparation of the adsorbent, silica gel particles are fully immersed in an M n+ ion salt with a specific concentration, such that the M n+ ion load forms a distributed monolayer on the surface of the silica gel, enabling stronger adhesion between the M n+ ions and the silica gel; intermediate M/SiO 2 is then fully immersed in a potassium ferrocyanide solution, so as to allow the potassium ferrocyanide to react with superficial M n+ ions and subsequently form a layer of ferrocyanides having stabilized M ions with stronger adhesion at the surface of the silica gel. Static adsorption tests for Cs + , fixed-bed reactor cold-flow model experiments and fixed-bed reactor radioactive tracer experiments for 137 Cs have indicated that the silica gel-supported ferrocyanide adsorbent prepared by the method has excellent adsorption for Cs + . |