Material | Temperature of Pyrolysis (˚C) |
| |||
350 | 450 | 550 | 650 | ||
| Fe |
| |||
SC(1) | 10.15 b(2) | 5.88 b | 6.24 b | 3.68 b | y = 26.0954 − 0.0615x + 4.3 × 10−5x2 (r2 = 0.869; p < 0.0001) |
RH | 0.08 a | 0.06 a | 0.02 a | 0.06 a | ns(3) |
PL | 0.44 a | 0.34 a | 0.45 a | 0.56 a | ns |
SD | 0.49 a | 0.49 a | 0.44 a | 0.51 a | ns |
| Mn |
| |||
SC | 0.07 b | 0.08 b | 0.08 c | 0.11 c | y = 0.0242 + 0.001x (r2 = 0.778; p < 0.0001) |
RH | 0.04 a | 0.04 a | 0.02 a | 0.04 a | ns |
PL | 0.05 a | 0.04 a | 0.05 b | 0.07 b | y = 0.1939 ? 0.0007x + 10−6x2 (r2 = 0.940; p = 0.0011) |
SD | 0.05 a | 0.04 a | 0.05 b | 0.06 b | y = 0.0267 ? 4.0 × 10−5x (r2 = 0.720; p < 0.0395) |
| Zn |
| |||
SC | 0.03 a | 0.03 bc | 0.03 a | 0.04 b | ns |
RH | 0.01 a | 0.01 a | 0.01 a | 0.02 a | ns |
PL | 0.09 b | 0.05 c | 0.08 b | 0.08 c | y = 0.3421 − 0.0011x + 10−6x2 (r2 = 0.493; p = 0.0001) |
SD | 0.03 a | 0.02 ab | 0.01 a | 0.02 a | ns |