English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/155899
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

Effects of aging under field conditions on biochar structure and composition: Implications for biochar stability in soils

AutorRosa Arranz, José M. de la ; Rosado, Mario; Paneque Carmona, M. ; Miller, A. Z. ; Knicker, Heike
Palabras claveCarbon sequestration
Pyrogenic carbon Mediterranean climate Organic amendment Physical and chemical parameters Soil properties
Pyrogenic carbon
Mediterranean climate
Organic amendment
Physical and chemical parameters
Soil properties
Climatology
Soil testing
Fecha de publicación1-feb-2018
EditorElsevier
CitaciónScience of The Total Environment (613-614): 969-976 (2018)
ResumenThe effects of aging on biochar (BC) properties, composition and carbon sequestration are still under debate. This study aimed at illustrating the qualitative alterations of five different BCs aged during a 24-month field experiment located in Southwest Spain. To determine the recalcitrance of each BC, physical fragmentation test, scanning electron microscopy, 13C NMR spectroscopy and CO2-respiration experiments were performed. The physical fragmentation values of all types of BC increased significantly over time at field conditions. FESEM examinations of aged BCs showed collapsed structures and the presence of entrapped soil material and microbial mats into the BC pores. The 13C NMR spectroscopy demonstrated an increase of the relative abundance of O-alkyl C and alkyl C at expenses of aromatic-C in aged BCs. The C losses of all BCs ranged from 27% to 11% of the initial C. In contrast, the nitrogen (N) content of wood-derived BCs significantly increased probably due to the sorption of nitrogen containing compounds into these highly-porous weathered chars. With the exception of that for the sewage sludge-BC, the pH of all aged BCs decreased from > 9 to the soil pH, indicating a short lasting of the liming effect caused by BC addition. The respiration experiment revealed that BC recalcitrance was much lower than expected and, within the range of decades. Only wood-derived BCs significantly increased the mean residence time of the slow C pool of the Cambisol by factors between 3.4 and 7.7. Mediterranean climate conditions and the characteristics of the Cambisol used probably accelerated the microbial degradation of BCs
Descripción8 páginas.-- 3 figuras.-- 4 tablas.-- 63 referencias
Versión del editorhttps://doi.org/10.1016/j.scitotenv.2017.09.124
URIhttp://hdl.handle.net/10261/155899
DOI10.1016/j.scitotenv.2017.09.124
ISBN0048-9697
Aparece en las colecciones: (IRNAS) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Effects_aging_imder_field_2018_Postprint.pdf Embargado hasta 1 de febrero de 2020383,18 kBAdobe PDFVista previa
Visualizar/Abrir     Petición de una copia
Mostrar el registro completo
 

Artículos relacionados:


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