Table 2 Relative transmittance intensity of HAs revealed by FTIR spectra.
From: Characterization of humic acids from original coal and its oxidization production
Sample | Relative transmittance intensity (%) | |||||||
|---|---|---|---|---|---|---|---|---|
3425 cm−1 | 2930 cm−1 | 2804 cm−1 | 1635 cm−1 | 1600 cm−1 | 1385 cm−1 | 762 cm−1 | ||
Liulina | HA1b | 12.69 | 15.52 | 15.85 | 8.20 | 10.75 | 16.90 | 20.07 |
OHA1c | 13.88 | 16.75 | 16.81 | 9.31 | 9.25 | 16.29 | 17.70 | |
Qitaihe | HA2 | 12.04 | 17.41 | 17.41 | 8.25 | 7.43 | 17.69 | 19.77 |
OHA2 | 11.75 | 17.62 | 17.74 | 7.68 | 6.97 | 17.62 | 20.62 | |
Hami | HA3 | 10.72 | 18.99 | 18.97 | 7.40 | 5.15 | 17.80 | 20.97 |
OHA3 | 10.00 | 17.68 | 17.74 | 7.91 | 5.37 | 18.98 | 22.32 | |
Lingshi | HA4 | 11.43 | 17.02 | 17.12 | 8.51 | 7.54 | 17.27 | 21.12 |
OHA4 | 11.56 | 18.22 | 18.19 | 7.44 | 6.04 | 18.04 | 20.51 | |
Yimin | HA5 | 12.12 | 17.14 | 17.24 | 9.09 | 8.32 | 16.99 | 19.10 |
OHA5 | 10.80 | 18.38 | 18.45 | 7.70 | 5.75 | 17.66 | 21.25 | |
