Table 2. Linear Combination Fitting of Se K Edge XANES Spectra for Reacted ZVI from B1 (1 mg L–1 Se), B2 (1 mg L–1 Se + 1800 mg L–1 SO42–), B3 (1 mg L–1 Se + 15 mg L–1 NO3—N), and B4 (1 mg L–1 Se + 1800 mg L–1 SO42– + 15 mg L–1 NO3–N).
| batch | ZVI | Se(VI) | Se(IV) | Se(0) | Se(−II) | total | R-factor |
|---|---|---|---|---|---|---|---|
| B1 | CGPM | 4.8 (±0.8) | 50.7 (±0.8) | 50.1 (±2.0) | 105.6 | 0.004 | |
| PM | 4.8 (±0.8) | 46.9 (±0.8) | 52.3 (±2.1) | 104.1 | 0.005 | ||
| QMP | 2.6 (±0.8) | 31.5 (±0.7) | 63.4 (±1.9) | 5.9 (±2.2) | 103.4 | 0.005 | |
| B2 | CGPM | 15.7 (±1.0) | 65.8 (±1.0) | 24.3 (±2.5) | 105.8 | 0.009 | |
| PM | 14.1 (±1.0) | 66.7 (±0.9) | 25.0 (±2.5) | 105.9 | 0.008 | ||
| QMP | 21.1 (±1.1) | 66.4 (±1.0) | 18.6 (±2.6) | 106.2 | 0.009 | ||
| B3 | CGPM | 5.0 (±0.8) | 58.8 (±0.8) | 40.0 (±2.0) | 103.8 | 0.004 | |
| PM | 4.7 (±0.8) | 49.7 (±0.8) | 49.7 (±2.1) | 104.1 | 0.005 | ||
| QMP | 2.6 (±0.7) | 35.6 (±0.7) | 65.4 (±1.7) | 103.6 | 0.004 | ||
| B4 | CGPM | 18.8 (±1.2) | 66.7 (±1.1) | 21.9 (±2.9) | 107.4 | 0.012 | |
| PM | 11.7 (±1.1) | 52.9 (±1.1) | 42.6 (±2.5) | 107.1 | 0.010 | ||
| QMP | 21.2 (±1.1) | 52.8 (±1.1) | 32.2 (±2.8) | 106.3 | 0.011 |