Table 3. Shows the dissolved amounts of Cu and Fe determined by the ICP-OES technique.
| Membrane | Cu (μg L−1) | Fe (μg L−1) |
|---|---|---|
| WO3 NWs–Fe2O3–cellulose | — | 62 ± 00 010 |
| WO3 NWs–CuO–cellulose | 108 ± 00 003 | — |
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