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Table 2 Summary of selected resin separation tests including treatment steps and outcome

From: Evaluating ion exchange resin efficiency and oxidative capacity for the separation of uranium(IV) and uranium(VI)

Resin

Column Type

Oxic or anoxic conditions

Ti(III) treatment

Initial [Utot] (μM)a

Utot Recovered (%)a

Initial U(IV) (%)

Initial U(VI) (%)

Recovered as U(IV) (%)b

Recovered as U(VI) (%)b

Bio-Rad AG1x8 prefilled

Bio-Rad Poly-prep

Oxic

No

2.1

72

0

100

0

100

Bio-Rad AG1x8 prefilled

Bio-Rad Poly-prep

Oxic

No

22.2

86

0

100

0

100

Bio-Rad AG1x8 powder

Bio-Rad Poly-prep

Oxic

No

2.1

92

0

100

0

100

Dowex 1x8 powder

Bio-Rad Poly-prep

Oxic

No

2.1

100

0

100

0

100

Dowex 1x8 powder

Pierce polystyrene

Oxic

No

2.1

100

0

100

0

100

Bio-Rad AG1x8 prefilled

Bio-Rad Poly-prep

Anoxic

No

2.1

81

36

64

0

100

Dowex 1x8 powder

Pierce polystyrene

Anoxic

No

8.7

100

98

2

86

14

Dowex 1x8 powder

Pierce polystyrene

Anoxic

Yes

8.7

100

98

2

98

2

Dowex 1x8 powder

Pierce polystyrene

Anoxic

Yes

1.8

100

0

100

0

100

Dowex 1x8 powder

Pierce polystyrene

Anoxic

Yes

2.8

100

100

0

100

0

Dowex 1x8 powder

Pierce polystyrene

Anoxic

Yes

2.1

100

10

90

11

89

Dowex 1x8 powder

Pierce polystyrene

Anoxic

Yes

1.8

100

48

52

47

53

  1. a. 1 mL of uranium solution added to resin, uncertainty in recovered Utot was 3%.
  2. b. Uncertainty in speciation recovery was 1%.