Table 1.
Typical approximate compositional analysis of Cu NPs/bentonite.
| Constituent | Typical (%) |
| SiO2 | 62.71 |
| Al2O3 | 12.3 |
| K2O | 0.47 |
| CaO | 2.06 |
| MgO | 1.35 |
| Fe2O3 | 1.06 |
| TiO2 | 0.07 |
| Cu | 4.27 |
| LOIa | 12.55 |
aLOI: loss on ignition (1000 °C, 2 h).
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