Spectroscopic and thermal investigation of hydrophobic and hydrophilic fractions of dissolved organic matter
Compost Science and Utilization, ISSN: 1065-657X, Vol: 14, Issue: 3, Page: 191-200
2006
- 11Citations
- 19Captures
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Article Description
Hydrophobic (HO) and hydrophilic (HI) fractions of dissolved organic matter (DOM) isolated from several substrates including a source separated urban waste compost, a mechanically separated urban waste compost, an anaerobically digested municipal sewage sludge, a composted sewage sludge and a cow slurry were characterised by Fourier transform infrared spectroscopy (FT-IR), monodimensional fluorescence spectroscopy in the emission, excitation and synchronous scan modes, tridimensional excitation emission matrix (EEM) fluorescence spectroscopy, H nuclear magnetic resonance (H-NMR) spectroscopy, and differential scanning calorimetry (DSC). The FT-IR spectra indicated that the HI fractions were rich in both aromatic and aliphatic structures, whereas the HO fractions were rich in carboxylic groups and polysaccharides. The synchronous scan spectra of HO fractions showed the main peak at a wavelength much longer than that of the HI fractions, which indicated a greater molecular complexity of the HO fractions with respect to HI fractions. The H-NMR data indicated a great percentage of aliphatic structures in all samples, whereas the HO samples were also characterised by the presence of aromatic structures. The DSC curves confirmed the more distinct aromatic nature of HO fractions, as compared to the corresponding HI fractions. © 2006 by The JG Press, Inc. All rights reserved.
Bibliographic Details
Informa UK Limited
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