Table 2. Adsorption of Different Ions by the PPy/GO Composite Electrode.
| ions | Ag+ | Cd2+ | Cu2+ | Pb2+ | Fe3+ |
|---|---|---|---|---|---|
| adsorption capacity (mg/g) | 26.26 | 30.59 | 41.51 | 42.82 | 44.57 |
| hydration radius (nm) | 3.41 | 4.26 | 4.19 | 4.01 | 4.28 |
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