Process for treating waste water containing uranium and fluorine

Details Process for treating waste water containing uranium and fluorine Process for treating waste water containing uranium and fluorine

1987-02-04

1989-02-28

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210667, 210668, 210677, 210682, 210683, 210684, 210725, 210756, 210764, 210912, 210915, C02F 900

Patent

active

048083160

ABSTRACT:
A process for treating a waste water containing uranium and fluorine comprises a neutralizing precipitation step wherein slaked lime is added to the waste water containing uranium and fluorine and precipitate thus formed in separated and removed, and an adsorption step wherein supernatant from the neutralizing precipitation step is contacted with a chelating resin which can selectively adsorb fluorine ions and another chelating resin which can selectively adsorb uranyl ions to thereby adsorb and remove the fluorine and uranyl ions remaining in the supernatant. Eluates of the ions adsorbed by the chelating resins and waste liquors for washing and regeneration of these resins are returned to the neutralizing precipitation step. Prior to the neutralizing precipitation step, a decarbonation step may be provided for decomposing carbonate ions, if they are contained in the waste water to be treated.

REFERENCES:
patent: 4402918 (1983-09-01), Elliott

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