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Percentage release of the elements for CMC/MgAl200/K2HPO4 and CMC/MgFe200/K2HPO4 composites.
| Release time | CMC/ MgAl200/K2HPO4 | CMC/MgFe200/K2HPO4 | |||
|---|---|---|---|---|---|
| P (%) | K (%) | P (%) | K (%) | ||
| 1 h | Method 1 | 6.6 | 16.3 | 2.4 | 12.9 |
| Method 2 | 8.0 | 23.0 | 6.2 | 25.4 | |
| Method 3 | 11.1 | 21.7 | 5.9 | 17.1 | |
| 168 h | Method 1 | 73.3 | 100.0 | 33.4 | 82.7 |
| Method 2 | 62.3 | 92.6 | 28.2 | 80.6 | |
| Method 3 | 69.5 | 92.4 | 32.0 | 76.4 | |
