Resin-based nano composite adsorbent used for extracting cesium from brine and preparation method of adsorbent

[0035] (1) In a 2000ml flask with a stirring and programmed temperature control heating device, add water and a dispersant, and fully stir until dissolved to form an aqueous phase; wherein, 500g of water; the dispersant is polyvinyl alcohol, and the amount added is 2.5g;

[0036] (2) The oil phase is composed of monomers, crosslinking agents and porogens. Specifically, the monomer is styrene, and the addition amount is 200 g; the crosslinking agent is divinylbenzene, and the addition amount is 200 g; the porogen is xylene, and the addition amount is 200 g; the oil phase is 600 g in total.

[0037] (3) Add initiator to the oil phase formed in step (2), stir well until dissolved. The initiators are benzoyl peroxide and azobisisobutyronitrile, and the addition amounts are 1.5g and 0.5g respectively.

[0038] (4) In the oil phase formed in step (3), adding inorganic nano-silicon material powder with a particle size of less than 1 μm. The addition amount of inorganic nano-silicon powd

[0043] The preparation process is the same as in Example 1, except that Co(NO 3 ) 2 ·6H 2 O add-on is 50g, and K in step (7) 4 Fe(CN) 6 ·3H 2 O addition is 76g. This adsorbent is numbered B.

[0045] The preparation process is the same as in Example 1, except that Co(NO 3 ) 2 ·6H 2 O add-on is 83.3g, and K in step (7) 4 Fe(CN) 6 ·3H 2 O addition is 126.7g. This adsorbent number is C.