Table 4: Concentrations of chemical elements in ROFA.
Elements | Averages ± SD (ppm) |
---|---|
Copper | 5.64 ± 1.09 |
Cadmium | 0.01 ± 0.00 |
Chrome | 4.20 ± 0.71 |
Nickel | 467.19 ± 9.75 |
Magnesium | 32.42 ± 4.60 |
Iron | 12265.77 ± 2697.33 |
Lead | 0.58 ± 0.18 |
Zinc | 21.12 ± 1.34 |