Table 2.
Parameters of the fitted components of XPS regions for fresh fume Mn, agglomerated Mn and welding fume samples.
| Fresh Fume Mn | Agglomerated Mn | Welding fume | |||||||
|---|---|---|---|---|---|---|---|---|---|
| XPS region | Peak | Binding Energy (FWHM), eV |
Conc., % | Binding Energy (FWHM), eV |
Conc., % | Binding Energy (FWHM), eV |
Conc., % | ||
| Mn 2p | Mn2+ | 640.1 (1.3) | 1.0 | 640.5 (1.3) | 11.5 | 640.0 (1.2) | 19.5 | ||
| Mn3+, Mn2+ | 641.4 (1.3) | 65.9 | 641.5 (1.3) | 20.6 | 641.1 (1.2) | 30.9 | |||
| Mn3+, Mn2+ | 642.4 (1.3) | 13.9 | 642.4 (1.3) | 21.4 | 641.9 (1.2) | 21.4 | |||
| Mn3+, Mn2+ | 643.3 (1.3) | 9.3 | 643.2 (1.3) | 19.4 | 642.9 (1.3) | 19.5 | |||
| shake up | 644.1 (1.3) | 4.9 | 644.2 (1.5) | 17.3 | 644.4 (1.2) | 7.1 | |||
| shake up | 645.2 (1.5) | 3.3 | 645.6 (1.8) | 7.6 | 646.0 (1.5) | 1.2 | |||
| shake up | 646.9 (1.8) | 1.7 | 647.3 (1.8) | 2.3 | 647.5 (1.1) | 0.5 | |||
| O 1s | O sorbed | -- | -- | 529.5 (1.3) | 18.9 | -- | -- | ||
| O2- | 530.3 (1.1) | 41.9 | 530.9 (1.3) | 27.3 | 530.1 (1.3) | 40.7 | |||
| OH−, CO32- | 531.5 (1.2) | 18.1 | 531.9 (1.5) | 25.6 | 531.3 (1.8) | 31.0 | |||
| H2O sorbed | 532.9 (1.9) | 40.1 | 533.2 (2.0) | 28.3 | 532.7 (1.7) | 28.4 | |||
| C 1s | C-C | 285.0 (1.6) | 77.6 | 284.9 (1.3) | 41.6 | 285.1 (1.2) | 61.1 | ||
| C=O | 286.7 (1.5) | 11.3 | 286.4 (1.7) | 50.3 | 286.5 (1.4) | 33.8 | |||
| O-C=O | 289.0 (1.3) | 11.2 | 288.8 (1.7) | 8.1 | 288.3 (1.8) | 5.1 | |||
| N 1s | NO3− | 407.2 (1.3) | 100.0 | 407.0 (2.7) | 100.0 | -- | -- | ||
| Fe 2p | pre-peak | -- | -- | -- | -- | 709.1 (1.1) | 6.7 | ||
| Fe3+ (α-FeOOH) | -- | -- | -- | -- | 710.1 (1.3) | 31.9 | |||
| Fe3+ (α-FeOOH) | -- | -- | -- | -- | 711.1 (1.2) | 25.0 | |||
| Fe3+ (α-FeOOH) | -- | -- | -- | -- | 712.1 (1.4) | 22.3 | |||
| Fe3+ (α-FeOOH) | -- | -- | -- | -- | 713.2 (1.4) | 6.1 | |||
| surface peak | -- | -- | -- | -- | 713.9 (2.0) | 8.0 | |||