Separation of Radium from Water

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Ra


Potable Water

Radium exists as a divalent cation in groundwater, so processes that remove water hardness components like calcium and magnesium are effective. Radium can be non-selectively removed from groundwater via standard cation exchange resins such as DOWEX MARATHON™ C (Na) Strong Acid Cation Resin and DOWEX™ MAC 3 Weak Acid Cation Resin, using several different regeneration cycles. These processes change the composition of the water hardness components and produce radium-containing wastes, which may not be desirable.

Before use, please check local regulations for use and disposal.

These resins may be subject to drinking water application restrictions in some countries. Please check the application status before use and sale. For more information see our regulatory information.

Selective Radium Removal

Dow produces a distinct ion exchange product designated as DOWEX™ RSC Resin that is extremely effective at removing radium from drinking water. DOWEX RSC does not remove other hardness ions. The resin is not regenerable and it concentrates the radium into a small volume for economical disposal.

DOWEX RSC can also be used to remove radium from waste brine from non-selective softening operations.

Before use, please check local regulations for use and disposal.

This resin may be subject to drinking water application restrictions in some countries. Please check the application status before use and sale. For more information see our regulatory information.

Mining

Radium is also of concern in mining applications. Radium can be non-selectively removed from groundwater via standard cation exchange resins such as DOWEX™ G 26 (H) Strong Acid Cation Resin and DOWEX MAC 3 Weak Acid Cation Resin, using several different regeneration cycles. These processes change the composition of the water hardness components and produce radium-containing wastes, which may not be desirable.

In uranium mining, radium is dealt with by direct barium precipitation techniques. These processes take up a lot of space and generate large quantities of sludge that must be further treated.

Radium can also be selectively removed with DOWEX RSC Resin.