http://www.cnr.it/ontology/cnr/individuo/prodotto/ID127603
The properties of native SOM in undisturbed sol aggregates as revealed by coupled LTA-PAS-FTIR approach (Comunicazione a convegno)
- Type
- Label
- The properties of native SOM in undisturbed sol aggregates as revealed by coupled LTA-PAS-FTIR approach (Comunicazione a convegno) (literal)
- Anno
- 2007-01-01T00:00:00+01:00 (literal)
- Alternative label
D'Acqui L.P., Pucci A., Calamai L. (2007)
The properties of native SOM in undisturbed sol aggregates as revealed by coupled LTA-PAS-FTIR approach
in EGU General Assembly, Vienna, Austria, 15-20 Apr 2007
(literal)
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- D'Acqui L.P., Pucci A., Calamai L. (literal)
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- Istituto per lo Studio degli Ecosistemi CNR - ISE, Via Madonna del Piano, Sesto Fiorentino, Italy
Università di Firenze, Dipartimento di Scienze del Suolo e Nutrizione della Pianta, Firenze, Italy (literal)
- Titolo
- The properties of native SOM in undisturbed sol aggregates as revealed by coupled LTA-PAS-FTIR approach (literal)
- Abstract
- Low-Temperature Ashing (LTA) by oxygen plasma has been used for removing soil
organic matter (SOM) from the mineral matrix of soil aggregates with minimal disturbance
and damage to the inorganic constituents. This technique allows a controlled
oxidation at low temperature of organic substances of undisturbed soil aggregates.
LTA removes SOM, layer by layer, without altering or damaging the residual layers,
like a peeling of onion skins as a function of the time and the applied power discharge.
When PAS (Photoacoustic) - FTIR spectroscopy is coupled with LTA, it is possible, at
each step, to obtain spectroscopic evidences of the residual OM layers and, by difference,
the spectra of the removed SOM. PAS-FTIR spectroscopy allows to obtain IR
spectra from the surface of irregular tri-dimensional specimens. Therefore, the coupled
LTA-PAS-FTIR approach can be useful in understanding the nature of SOM as
well as the surface interaction of native OM in undisturbed aggregates with xenobiotics
and macromolecules of biological interest.
Two case studies are reported: dispersing or stability properties of OM in undisturbed
aggregates from a tropical crusting soil and the role of native (literal)
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