Table 1. Brightness Parameters on Bleached TMP with Different Surface Activatorsa.
| pH |
residual (kg/ton) |
||||||
|---|---|---|---|---|---|---|---|
| sample | initial | final | peroxide | alkali | brightness % ISO | whiteness % | yellowness % |
| unbleached (reference) | 4.5 | 4.5 | 58.0 ± 0.1 | 1.3 ± 0.1 | 27.9 ± 0.1 | ||
| H2O2 | 11.4 | 9.0 | 1.42 | 0.01 | 65.6 ± 0.1 | 19.1 ± 0.2 | 22.8 ± 0.1 |
| TAED | 11.3 | 8.2 | 2.41 | 0.02 | 66.9 ± 0.2 | 22.6 ± 0.2 | 21.6 ± 0.1 |
| SOA | 11.5 | 8.2 | 2.58 | 0.02 | 67.1 ± 0.1 | 23.1 ± 0.2 | 21.4 ± 0.1 |
| LOA | 10.7 | 7.4 | 1.14 | 0.01 | 68.2 ± 0.2 | 24.4 ± 0.3 | 21.3 ± 0.1 |
a
Reprinted from ref (38) with permission from Springer Nature.