A5010177385- Soil Carbon and Nitrogen Dynamics
- Fire effects on ecosystems
- Isotope Analysis in Ecology
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Coal and Its By-products
- Lignin and Wood Chemistry
- Clay minerals and soil interactions
- Composting and Vermicomposting Techniques
- Marine and environmental studies
- Thermochemical Biomass Conversion Processes
- Toxic Organic Pollutants Impact
- Heavy metals in environment
- Enzyme-mediated dye degradation
- Petroleum Processing and Analysis
- Marine and coastal ecosystems
- NMR spectroscopy and applications
- Metabolomics and Mass Spectrometry Studies
- Peatlands and Wetlands Ecology
- Atmospheric and Environmental Gas Dynamics
- Pesticide and Herbicide Environmental Studies
- Fermentation and Sensory Analysis
- Forest Biomass Utilization and Management
- Plant and soil sciences
- Odor and Emission Control Technologies
Instituto de Recursos Naturales y Agrobiología de Sevilla
2013-2023
Consejo Superior de Investigaciones Científicas
2005-2015
National Research Council
2006-2013
Instituto de Productos Naturales y Agrobiología
1993-2012
Universidad de Navarra
2008-2009
Old Dominion University
2007
Technical University of Munich
2006
Biologie et Gestion des Risques en Agriculture
2005
Centre National de la Recherche Scientifique
2005
Universidad de Sevilla
2001
Black carbon (BC), the product of incomplete combustion fossil fuels and biomass (called elemental (EC) in atmospheric sciences), was quantified 12 different materials by 17 laboratories from disciplines, using seven methods. The were divided into three classes: (1) potentially interfering materials, (2) laboratory‐produced BC‐rich (3) BC‐containing environmental matrices (from soil, water, sediment, atmosphere). This is first comprehensive intercomparison this type (multimethod, multilab,...
This study is about the effects of forest fire on organic matter from a Dystric Xerochrept under Quercus rotundifolia. In laboratory experiments carried out to simulate isolated humic fractions, several physicochemical characteristics were described in heated samples, as well substances extracted samples control and postfire soil areas. The results obtained suggested that fulvic acids underwent moderate structural modifications, but we found important changes their colloidal properties,...
The amount and compositional characteristics of black carbon in soils (mollisol vertisol), charred biomass (laboratory produced; rice, chestnut), (southern Spain) affected by forest fire have been determined using a combination thermogravimetry (TG), TG coupled with isotope ratio mass spectrometry (IRMS), solid state 13 C nuclear magnetic resonance (NMR) spectroscopy, pyrolysis‐gas chromatography/mass (Py‐GC/MS). Samples had higher total organic matter content, this was enriched aromatic...
Summary The variable effect of different types forest fires on the quantity and quality soil organic matter (SOM) was analysed by comparing burnt unburnt soils from six ecosystems in central Spain elemental analysis solid‐state 13 C nuclear magnetic resonance (NMR) spectroscopy. Whole samples were collected 1 to 2 years after included one site affected two within years. fire‐affected showed no common pattern with respect amount additional carbon ( add ) but at all sites, fire enhanced...
Previous studies have indicated that the main fractions of humic substances (HS), gray acid (GHA), brown (BHA), and fulvic (FA), present different molecular patterns in water solution are probably associated with specific structural features. However, techniques used these previous did not permit clarification principal qualitative characteristics structures. To study more depth this subject several GHA, BHA, FA been analyzed through complementary use UV−visible FTIR spectroscopy, 13C NMR,...
The structural transformations undergone by lignocellulosic biomass (freeze-dried rye grass, Lolium rigidum) subjected to progressive isothermal heating (burning at 350 °C under oxidizing conditions for 30, 45, 60, 75, and 90 s) have been monitored Curie-point pyrolysis−gas chromatography−mass spectrometry (Py−GC−MS). pyrograms suggest that even charred residues after severe (carbon loss ca. 50%) still contain substantial concentrations of some resistant plant components. Several trends were...