Treatment method for used ion exchange resin and treatment apparatus for used ion exchange resin

Patent metadata

Field	Value
Publication number	US-2016243474-A1
Application number	US-201615048155-A
Country	US
Kind code	A1
Filing date	Feb 19, 2016
Priority date	Feb 24, 2015
Publication date	Aug 25, 2016
Grant date	—

Abstract

A treatment method for a used ion exchange resin, includes: bringing a used ion exchange resin into contact with a reaction solution, the used ion exchange resin having an ion exchange group with at least a radionuclide or a heavy metal element adsorbed thereon, and the reaction solution containing an iron compound, hydrogen peroxide, and ozone; separating at least a part of the reaction solution in contact with the used ion exchange resin from the used ion exchange resin; and decomposing an organic component contained in the reaction solution separated from the used ion exchange resin.

First claim

What is claimed is:

1 . A treatment method for a used ion exchange resin, comprising:
bringing a used ion exchange resin into contact with a reaction solution, the used ion exchange resin having an ion exchange group with at least a radionuclide or a heavy metal element adsorbed thereon, and the reaction solution containing an iron compound, hydrogen peroxide, and ozone; separating at least a part of the reaction solution in contact with the used ion exchange resin from the used ion exchange resin; and decomposing an organic component contained in the reaction solution separated from the used ion exchange resin.

2 . The treatment method for the used ion exchange resin according to claim 1 ,
wherein the reaction solution is added with an iron compound, hydrogen peroxide, and ozone during decomposing the organic component contained in the reaction solution.

3 . The treatment method for the used ion exchange resin according to claim 1 ,
wherein at least the part of the reaction solution in contact with the used ion exchange resin is separated from the used ion exchange resin after total organic carbon concentration in the reaction solution becomes 1.7 mol/L or more.

4 . The treatment method for the used ion exchange resin according to claim 1 ,
wherein at least the part of the reaction solution in contact with the used ion exchange resin is separated from the used ion exchange resin after concentration of the radionuclide or concentration of the heavy metal element in the reaction solution becomes a predetermined value or more.

5 . The treatment method for the used ion exchange resin according to claim 1 ,
wherein at least the part of the reaction solution in contact with the used ion exchange resin is separated from the used ion exchange resin after adding an aggregating agent that aggregates the used ion exchange resin to the reaction solution.

6 . The treatment method for the used ion exchange resin according to claim 1 , further comprising recovering the ozone during bringing the used ion exchange resin into contact with the reaction solution.

7 . The treatment method for the used ion exchange resin according to claim 1 ,
wherein: the used ion exchange resin is brought into contact with the reaction solution in a reaction tank, and the organic component contained in the reaction solution is decomposed in a regeneration tank different from the reaction tank.

8 . A treatment apparatus for a used ion exchange resin, comprising:
a reaction tank capable of housing a used ion exchange resin, the used ion exchange resin having an ion exchange group with at least a radionuclide or a heavy metal element adsorbed thereon; a first iron compound supplier connected to the reaction tank, capable of holding an iron compound, and capable of supplying the iron compound to the reaction tank; a first hydrogen peroxide supplier connected to the reaction tank, capable of holding hydrogen peroxide, and capable of supplying the hydrogen peroxide to the reaction tank; a first ozone supplier connected to the reaction tank and capable of supplying ozone into a liquid phase in the reaction tank; a regeneration tank connected to the reaction tank, capable of holding liquid supplied from the reaction tank, and capable of supplying the held liquid therein to the reaction tank; and an organic substance decomposer connected to the regeneration tank and capable of decomposing an organic substance included in the liquid in the regeneration tank.

9 . The treatment apparatus for the used ion exchange resin according to claim 8 ,
wherein the organic substance decomposer comprises:
a second iron compound supplier connected to the regeneration tank, capable of holding an iron compound, and capable of supplying the iron compound to the regeneration tank;
a second hydrogen peroxide supplier connected to the regeneration tank, capable of holding hydrogen peroxide, and capable of supplying the hydrogen peroxide to the regeneration tank; and
a second ozone supplier connected to the regeneration tank and capable of supplying ozone into a liquid phase in the regeneration tank.

Assignees

• Toshiba Kk

Inventors

• Sugimori Toshiaki
• Miyamoto Shinya
• Murayama Seiichi
• Murata Takaaki
• Yaita Yumi
• Kaneko Masaaki

Classifications

• A62D2101/24

  containing heavy metals · CPC title

• C02F1/42 Primary

  by ion-exchange (ion-exchange in general B01J) · CPC title

• G21F9/28

  Treating solids · CPC title

• B01J49/53

  for cationic exchangers · CPC title

• A62D3/38

  by oxidation; by combustion · CPC title