Humic acid-like (RA-like) and core-humic acid-like (core-RA-like) were characterized during the high-rate composting process by CP-MAS C-13 NMR, pyrolysis-gas chromatography (GC) / mass spectrometry (MS), and elemental analysis. Results obtained indicated that humification proceeded through a relative concentration of aromatic fractions due to the faster degradation of the O-alkyl and alkyl fractions. Core-RA-like, after purification of the parent material, showed a large reduction of the O-alkyl fraction in terms of HA-like. We concluded that HA-like consisted of refractory organic molecules, such as lignin and biopolymers, which formed a stable structure (core-HA-like) coated with degradable material associated with the core by weak physical association, ether or ester bounds
Qualitative modification of humic acid and core-humic acid during high-rate composting of pig faeces amended with wheat straw / P.L. Genevini, F. Adani, A.H.M. Veeken, K.G.J. Nierop, B. Scaglia, C. Dijkema. - In: SOIL SCIENCE AND PLANT NUTRITION. - ISSN 0038-0768. - 48:2(2002 Apr), pp. 143-150.
Qualitative modification of humic acid and core-humic acid during high-rate composting of pig faeces amended with wheat straw
F. AdaniSecondo
;B. ScagliaPenultimo
;
2002
Abstract
Humic acid-like (RA-like) and core-humic acid-like (core-RA-like) were characterized during the high-rate composting process by CP-MAS C-13 NMR, pyrolysis-gas chromatography (GC) / mass spectrometry (MS), and elemental analysis. Results obtained indicated that humification proceeded through a relative concentration of aromatic fractions due to the faster degradation of the O-alkyl and alkyl fractions. Core-RA-like, after purification of the parent material, showed a large reduction of the O-alkyl fraction in terms of HA-like. We concluded that HA-like consisted of refractory organic molecules, such as lignin and biopolymers, which formed a stable structure (core-HA-like) coated with degradable material associated with the core by weak physical association, ether or ester boundsPubblicazioni consigliate
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