We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Comparison between the humic acids characteristics of two andisols of different age by: FT-IR and H-NMR spectroscopy and py-FIMS.
- Authors
Baglieri, A.; Gennari, M.; Ioppolo, A.; Leinweber, P.; Nègre, M.
- Abstract
Mt Etna (Italy) is the highest, active volcano in Europe. Thanks to the availability of descriptive documents and maps, it is possible to date the formation of several Etna soils. We evaluated the effect of soil formation age on the composition of the soil organic matter (SOM) and humic acids (HAs) from two Etna andisols of different ages but having the same vegetation ( Castanea saliva) and pedogenetic substrate (tephra). The characterization of the SOM and the HAs was carried out by elementary and functional group analysis, UV-visible spectrophotometry, Fourier Transform InfraRed (FT-IR) and H-Nuclear Magnetic Resonance (1H-NMR) spectroscopies, and Pyrolysis-Field Ionization Mass Spectrometry (py-FIMS). Data showed that the age of the soil cannot be considered as influencing the chemical composition of the SOM. However higher volatilisation temperatures, for some compound classes, indicate the presence of more thermally-stable, organic molecules, therefore a more mature organic matter, or an organic component more greatly bound to the mineral component in the older soil. Finally the HA extracted from old soil contains a lower quantity of aliphatic compounds and a greater quantity of carbohydrate and aromatic molecules than the HA extracted from young soil.
- Subjects
ETNA, Mount (Italy); HUMIC acid; FOURIER transform infrared spectroscopy; ORGANIC compounds; VOLCANIC ash, tuff, etc.; NUCLEAR magnetic resonance
- Publication
Geochemistry International, 2012, Vol 50, Issue 2, p148
- ISSN
0016-7029
- Publication type
Article
- DOI
10.1134/S0016702912020048