Table 5 Element content of input-material of thermal melting process
Item | SWFA | Silica gel | Sludge | Bottom ash | ||||
|---|---|---|---|---|---|---|---|---|
Average (g kg−1) | RSD (%) | Average (g kg−1) | RSD (%) | Average (g kg−1) | RSD (%) | Average (g kg−1) | RSD (%) | |
Al | 0.6 | 41.1 | N.D | N.A | 8.7 | 2.8 | 31.3 | 9.2 |
Ca | 1.7 | 8.5 | 11.2 | 38.2 | 9.5 | 8.6 | 36.5 | 32.8 |
Cd | 0.04 | 3.4 | N.D | N.A | 0.4 | 3.3 | < 0.001 | 49.5 |
Co | 0.02 | 2.3 | N.D | N.A | 0.7 | 4.7 | 0.5 | 3.7 |
Cr | 3.5 | 27.0 | 0.01 | 69.6 | 0.6 | 5.0 | 2.8 | 8.4 |
Cu | 0.7 | 3.5 | N.D | N.A | 24.1 | 2.96 | 7.1 | 7.5 |
Fe | 24.9 | 33.3 | 0.4 | 15.9 | 15.2 | 10.0 | 70.8 | 7.2 |
K | 0.1 | 12.8 | 0.02 | 14.0 | 6.4 | 7.4 | 2.7 | 8.7 |
Mg | 0.3 | 12.4 | 3.6 | 8.1 | 1.0 | 11.6 | 9.0 | 18.9 |
Mn | 0.09 | 4.0 | N.D | N.A | 1.6 | 4.3 | 2.2 | 26.4 |
Na | 4.2 | 5.3 | 1.9 | 7.2 | 39.1 | 8.0 | 22.5 | 20.3 |
Ni | 0.3 | 34.8 | N.D | N.A | 5.2 | 4.6 | 2.0 | 5.3 |
Pb | 2.2 | 6.4 | N.D | N.A | 3.2 | 3.8 | 1.5 | 5.6 |
Si | 14.5 | 15.3 | 92.5 | 21.8 | 15.2 | 31.1 | 37.8 | 28.4 |
Zn | 0.5 | 4.7 | 0.05 | 17.8 | 1.0 | 3.8 | 2.5 | 5.3 |
Cl− | 8.5 | 16.2 | 0.8 | 15.4 | 9.4 | 28.5 | 1.4 | 25.4 |