Table 2 Results of the in-situ desorption experiments in the Kaolinitic particle 01 and the Micaceous particle 01.

From: Microscopic analyses of weathered granite in ion-adsorption rare earth deposit of Jianxi Province, China

Kaolinitic particle01

Micaceous particle01

 

Before tretment

After treatment

Desorption ratio (%)

 

Before tretment

After treatment

Desorption ratio (%)

Y (ppm)

74.3

23.6

68.2

Y (ppm)

224

66.4

70.3

La (ppm)

61.4

16.2

73.6

La (ppm)

497

84.4

83.0

Ce (ppm)

629

324

48.5

Ce (ppm)

87.6

25.6

70.8

Pr (ppm)

24.1

7.30

69.8

Pr (ppm)

114

21.2

81.3

Nd (ppm)

97.1

32.4

66.6

Nd (ppm)

410

72.4

82.4

Sm (ppm)

28.2

9.15

67.6

Sm (ppm)

80.3

18.2

77.3

Eu (ppm)

5.41

2.00

63.1

Eu (ppm)

21.9

5.25

76.0

Gd (ppm)

26.3

8.08

69.2

Gd (ppm)

64.2

15.1

76.4

Tb (ppm)

4.04

1.45

64.2

Tb (ppm)

9.28

2.70

70.9

Dy (ppm)

23.1

10.2

55.6

Dy (ppm)

50.4

17.1

66.2

Ho (ppm)

4.04

1.64

59.5

Ho (ppm)

8.86

3.40

61.7

Er (ppm)

11.7

4.88

58.4

Er (ppm)

23.6

10.3

56.2

Tm (ppm)

1.72

0.74

56.9

Tm (ppm)

3.21

1.62

49.7

Yb (ppm)

12.4

5.73

53.9

Yb (ppm)

19.7

11.7

40.7

Lu (ppm)

1.68

0.93

45.0

Lu (ppm)

2.97

1.74

41.3

LREE (ppm)

845

391

53.7

LREE (ppm)

1211

227

81.2

LREEa (ppm)

216

67.1

69.0

LREEa (ppm)

1123

201

82.1

HREE (ppm)

85.0

33.7

60.4

HREE (ppm)

182

64

65.1

REE (ppm)

985

448

54.5

REE (ppm)

1393

291

79.1

REEa (ppm)

301

101

66.6

REEa (ppm)

1305

265

79.7

REY (ppm)

1059

472

55.4

REY (ppm)

1617

357

77.9

LREE/HREE

9.94

11.6

 

LREE/HREE

6.64

3.57

 

LREEa/HREE

2.54

1.99

 

LREEa/HREE

6.16

3.16

 

Y/Ho

18.4

14.4

 

Y/Ho

25.3

19.6

 

[Ce/Ce*]N

2.43

4.43

 

[Ce/Ce*]N

0.09

0.14

 

[Eu/Eu*]N

0.20

0.20

 

[Eu/Eu*]N

0.93

0.96

 

[La/Yb]N

24.8

11.9

 

[La/Yb]N

17.2

4.92

 
Back to article page