Table 3 Element composition of RFA ash and two washed ashes
Item | RFA | FWFA | SWFA | |||
|---|---|---|---|---|---|---|
Average (g kg−1) | RSD (%) | Average (g kg−1) | RSD (%) | Average (g kg−1) | RSD (%) | |
Al | 1.3 | 57.1 | 1.1 | 45.4 | 0.6 | 41.1 |
Ca | 6.9 | 67.0 | 3.4 | 16.8 | 1.7 | 8.5 |
Cd | 0.04 | 2.4 | 0.04 | 15.0 | 0.04 | 3.4 |
Co | 0.06 | 4.4 | 0.03 | 27.7 | 0.02 | 2.3 |
Cr | 4.8 | 18.5 | 5.2 | 51.1 | 3.5 | 27.0 |
Cu | 1.3 | 12.3 | 0.9 | 12.2 | 0.7 | 3.5 |
Fe | 25.4 | 21.8 | 20.8 | 17.6 | 24.9 | 33.3 |
K | 2.1 | 57.0 | 0.5 | 31.1 | 0.1 | 12.8 |
Mn | 0.3 | 7.9 | 0.2 | 27.6 | 0.09 | 4.0 |
Mg | 1.9 | 4.5 | 1.2 | 43.9 | 0.3 | 12.4 |
Na | 133 | 1.3 | 47.4 | 48.7 | 4.2 | 5.3 |
Ni | 1.6 | 6.3 | 0.8 | 39.5 | 0.3 | 34.8 |
Pb | 3.2 | 23.4 | 2.1 | 3.87 | 2.2 | 6.4 |
Si | 22.4 | 21.1 | 17.5 | 14.2 | 14.5 | 15.3 |
Zn | 1.8 | 2.2 | 1.1 | 40.9 | 0.5 | 4.7 |
Cl− | 112 | 19.4 | 36.5 | 13.5 | 8.5 | 16.2 |
RMP (%) | 100 | – | 80.7 | 12.3 | 72.1 | 14.5 |