Table 5
Zeta potential measurements of different nanofluids.
| Type | Zeta potential (mV) |
||||
|---|---|---|---|---|---|
| First measurement | Second measurement | Third measurement | Average | Standard deviation | |
| DW + 4 wt.% rock powder | +40.6 | +41.9 | +42.3 | +41.6 | 0.7 |
| FW + 4 wt.% rock powder | –9.6 | –11.1 | –10.2 | –10.3 | 0.6 |
| 500 ppm nanofluid + 4 wt.% Rock Powder | –40.2 | –42.8 | –41.4 | –41.4 | 1.0 |
| 1000 ppm nanofluid + 4 wt.% rock powder | –48.7 | –46.2 | –46.0 | –46.9 | 1.2 |
| 2000 ppm nanofluid + 4 wt.% rock powder | –32.5 | –29.5 | –31.1 | –31.0 | 1.2 |