Research Article
Oxidative Transformation of Controlled Substances by Manganese Dioxide
Figure 6
Effect of metal ions on the oxidation of codeine by MnO2: (a) Mn2+, (b) Fe3+, (c) Ca2+, and (d) Mg2+ (MnO2 loading = 8 mg/L, initial codeine concentration = 100 μg/L, pH = 7, and ionic strength = 10 mM).
| (a) |
| (b) |
| (c) |
| (d) |