Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/82041
COMPARTIR / EXPORTAR:
logo share SHARE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Título

Analitical pirolysis of a podzolic soil sequence from Santa Catarina lirttoral (S. Brasil)

AutorGonzález-Pérez, José Antonio CSIC ORCID ; Boski, Tomasz; Knicker, Heike CSIC ORCID ; González-Vila, Francisco Javier CSIC ORCID ; Angulo, R.; Souza, María Cristina
Fecha de publicación2012
Citación19th International Symposium on Analytical and Applied Pyrolysis
ResumenPiçarras (a vernacular term for podzols) occur along the South Eastern coastal zone of Brazil between Rio Grande do Sul and Rio de Janeiro States. These are formed by cementation of B soil horizons formed on sandy littoral sediments covered by the lush Atlantic forest. The cementing material is a mixture of sesquioxides (2-4%) and humic material with an elemental C content between 1 and 3%. It is assumed that the colonization of the accreted littoral bodies by vegetation occurred rapidly and contributed to the accumulation of humic material. Our study was done along a 2.5 km trench, perpendicular to the shore line in Volta Velha) in NE Santa Catarina State (26º04¿ S; 48º38¿ W), part of the Atlantic Forest Biosphere Reserve. The investigated trench profile is also roughly perpendicular to the front of prograding Holocene barriers. Samples (14) were collected and submitted to inorganic, and organic elemental analyses, GC/MS análisis of lipid fractions, analytical pyrolysis (Py-GC/MS) and 13C nuclear magnetic resonance (13C CP/MAS NMR). Age estimation of the progradational sequence was done by 14C-AMS of selected samples. Dating of the humic material proved the accretion model for the local costal barrier and opens new perspectives for the development of a new geochronological tool. Solid state 13C Nuclear magnetic resonance showed marked compositional differences between the organic matter spectra of different ages. The most spectacular seems to be the time dependent decrease in the carbohydrates, most probably mediated by bacterial respiration1. In order to confirm the noted alterations of the podzol¿s organic matter with age, in this communication we studied the thermal desorption and pyrolysis behaviour of a sequence of 14 podzol samples taken from the B horizon of soils representing the progradation front of the coastal barrier.
DescripciónTrabajo presentado al citado Symposium, celebrado del 21-25 de mayo, de 2012, en Linz, Austria.
URIhttp://hdl.handle.net/10261/82041
Aparece en las colecciones: (IRNAS) Comunicaciones congresos




Ficheros en este ítem:
Fichero Descripción Tamaño Formato
Analitical pyrolysis.pdf90,06 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo

CORE Recommender

Page view(s)

299
checked on 18-mar-2024

Download(s)

90
checked on 18-mar-2024

Google ScholarTM

Check


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.