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EnglishDiffuse reflectance infrared Fourier transform, surface-enhanced Raman and proton nuclear magnetic resonance spectroscopies were applied to investigate the structure of humic acids (HA) extracted from peat (P-HA), leonardite (Le-HA) and lignite (Li-HA) samples. The combined use of these techniques has shown a specific pattern of functional groups for each sample. P-HA was characterised by a greater content of oxygenate (COOH, C-OH in carbohydrates and phenols) and aliphatic groups. Le-HA and Li-HA showed a lower content of sugar-like components and polyethers. On the other hand, the aromatic structures were ubiquitous in all samples, although the different composition in Le-HA and Li-HA could be employed to identify and distinguish the HA in these two kinds of humic materials. © 2001 Elsevier Science B.V.
| Titolo: | Spectroscopic study (DRIFT, SERS and1 H NMR) of peat, leonardite and lignite humic substances | |
| Autore/i: | Francioso O.; Sanchez-Cortes S.; Tugnoli V.; Marzadori C.; Ciavatta C. | |
| Autore/i Unibo: | ||
| Anno: | 2001 | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/S0022-2860(00)00905-4 | |
| Abstract: | Diffuse reflectance infrared Fourier transform, surface-enhanced Raman and proton nuclear magnetic resonance spectroscopies were applied to investigate the structure of humic acids (HA) extracted from peat (P-HA), leonardite (Le-HA) and lignite (Li-HA) samples. The combined use of these techniques has shown a specific pattern of functional groups for each sample. P-HA was characterised by a greater content of oxygenate (COOH, C-OH in carbohydrates and phenols) and aliphatic groups. Le-HA and Li-HA showed a lower content of sugar-like components and polyethers. On the other hand, the aromatic structures were ubiquitous in all samples, although the different composition in Le-HA and Li-HA could be employed to identify and distinguish the HA in these two kinds of humic materials. © 2001 Elsevier Science B.V. | |
| Data stato definitivo: | 2022-03-09T23:38:02Z | |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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