Table 6.
Total recovery of each element at different leaching process (pH<0.2, pH=1.0 and pH=2.0), which is extracted from the phase quantification of XRD patterns. The error of the reported Recovered (%) is less than 3 % for all of the recovered elements.
|
|
|
Recovered elements |
||||
|---|---|---|---|---|---|---|
|
|
|
La |
Zr |
P |
Fe |
Ti |
|
Leaching in a concentrated HCl solution (pH<0.2) |
Total recovered moles per 1.0 g of mixture |
2.17E−03 |
1.44E−03 |
3.03E−04 |
3.69E−04 |
4.06E−04 |
|
Expected moles per 1.0 g of mixture |
2.82E−03 |
1.88E−03 |
4.37E−04 |
4.37E−04 |
7.58E−04 |
|
|
Recovered (%) |
77 |
76 |
69 |
84 |
54 |
|
|
Leaching in HCl solution with pH=1.0 |
Total recovered moles per 1.0 g of mixture |
2.31E−03 |
1.63E−03 |
3.41E−04 |
2.91E−04 |
5.38E−04 |
|
Expected moles per 1.0 g of mixture |
2.82E−03 |
1.88E−03 |
4.37E−04 |
4.37E−04 |
7.58E−04 |
|
|
Recovered (%) |
82 |
87 |
78 |
67 |
71 |
|
|
Leaching in HCl solution with pH=2.0 |
Total recovered moles per 1.0 g of mixture |
1.61E−03 |
1.16E−03 |
2.29E−04 |
2.33E−04 |
4.51E−04 |
|
Expected moles per 1.0 g of mixture |
2.85E−03 |
1.88E−03 |
4.37E−04 |
4.37E−04 |
7.58E−04 |
|
|
Recovered (%) |
56 |
62 |
52 |
53 |
60 |
|