Table 5 Elemental analysis results of three samples analyzed by SEM–EDX
Sample | Identified elements and their ratio (%) | ||||||
|---|---|---|---|---|---|---|---|
C (K) | O (K) | Na (K) | Al (K) | S (K) | K (K) | Fe (K) | |
AE-06 | 63.44 | 33.09 | 1.97 | 0.32 | 0.34 | 0.24 | 0.60 |
AE-16 | 62.99 | 33.95 | 1.45 | 0.29 | 0.35 | 0.21 | 0.76 |
AE17 | 62.87 | 34.01 | 1.53 | 0.30 | 0.30 | 0.19 | 0.80 |