2024-03-28T22:17:03Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/821002019-08-06T09:27:08Zcom_10261_15com_10261_6col_10261_268
2013-09-16T11:10:57Z
urn:hdl:10261/82100
How useful is the mid-infrared spectroscopy in the assessment of black carbon in soils
Rosa Arranz, José M. de la
González-Vila, Francisco Javier
González-Pérez, José Antonio
Almendros Martín, Gonzalo
Hernández, Zulimar
López Martín, María
Knicker, Heike
Black Carbon chemical oxidation methods
Refractory organic matter
Spectroscopic techniques
5 pages, 2 figures, 11 references.
Black carbon (BC), the recalcitrant continuum of products from incomplete combustion, includes char, charcoal and
soot, being considered an important component of the global C cycle. However due to measurement uncertainties, the
magnitude and distribution of BC is hardly known. In this study, a rapid and inexpensive spectroscopic technique, as it
is mid-infrared spectroscopy in combination with oxidation procedures is proposed to quantify the recalcitrant
aromatic fraction resistant, which can effectively determine the proportion of BC in soils.
This method was tested by using a wide variety soil samples of various origin, composition and properties. Results were
contrasted by those obtained by applying solid-state Nuclear Magnetic Resonance (NMR) spectroscopy. Mid-infrared
spectroscopy showed a very high predicting potential in the case of samples with large concentrations of BC by taking
advantage of the relative optical density of the 2920 cm-1 C–H stretching band. In the case of soils with low BC
contents, the application of Partial Least Square Regression to baseline-subtracted, second-derivative FourierTransformed Infra-red (FT-IR) spectra lead to significant (P<0.05) cross-validation models. By this procedure a
considerable improvement in forecasting the aromatic fraction resistant to the chemical oxidation steps (BC-like
material) was obtained.
2013-09-16T11:10:57Z
2013-09-16T11:10:57Z
2013
artículo
Flamma 4 (3): 147-151 (2013)
2171-665X
http://hdl.handle.net/10261/82100
eng
openAccess
FuegoRED (Red Temática Nacional Efectos de los Incendios Forestales sobre el Suelo)