English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Detailed carbon chemistry in charcoals from pre-European Maori gardens of New Zealand as a tool for understanding biochar stability in soils

Pereira, R. C., Arbestain, M. C., Kaal, J., Sueiro, M. V., Sevilla, M., & Hindmarsh, J. (2014). Detailed carbon chemistry in charcoals from pre-European Maori gardens of New Zealand as a tool for understanding biochar stability in soils. European Journal of Soil Science, 65(1), 83-95. doi:10.1111/ejss.12096.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-3A2C-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-7ABE-8
Genre: Journal Article

Files

show Files
hide Files
:
1921753.pdf (Publisher version), 836KB
 
File Permalink:
-
Name:
1921753.pdf
Description:
-
Visibility:
Restricted (Max Planck Institute of Colloids and Interfaces, MTKG; )
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Pereira, R. Calvelo1, Author
Arbestain, M. Camps1, Author
Kaal, J.1, Author
Sueiro, M. Vazquez1, Author
Sevilla, M.2, Author              
Hindmarsh, J.1, Author
Affiliations:
1external, ou_persistent22              
2Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863288              

Content

show
hide
Free keywords: -
 Abstract: The stability of biochar, a form of charcoal intentionally made to be added to soil to sequester carbon (C) and improve its function, remains unclear. As it is not feasible to perform long-term (decades, centuries) laboratory experiments to assess biochar evolution after soil amendment, the study of ancient archaeological charcoals can help to identify characteristics (and possibly molecular markers) associated with the decomposition and preservation dynamics of biochar in specific pedoclimatic environments. In this study, the chemical composition of the organic carbon fractions of three charcoals from pre-European Mori gardens of New Zealand (buried >25cm depth) was thoroughly assessed. Complementary short-term incubations of charcoals in sand were used to (i) evaluate the stability of C in the short-medium term, (ii) model its mineralization processes and (iii) estimate the C turnover. Elemental analysis, thermogravimetric analysis (TG), X-ray photoelectron spectroscopy (XPS), solid-state C-13 nuclear magnetic resonance (NMR) and pyrolysis gas chromatography/mass spectroscopy (Py-GC-MS) gave consistent results in describing the charring intensity and the degree of polycondensation of these charcoals. The oldest buried deposit (770 +/- 50years BP) still retained un-charred or weakly charred lignocellulosic material, indicating that such material survived decomposition processes for several centuries. The amount of organic C mineralized in 109days was <0.5% of the initial charcoal-C. No differences in MRT among samples were detected in spite of inferred differences in thermal impact. Longer-term incubations are needed to obtain better estimates of C turnover rates in charred material.

Details

show
hide
Language(s):
 Dates: 2014-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000329429800011
DOI: 10.1111/ejss.12096
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: European Journal of Soil Science
  Alternative Title : Eur. J. Soil Sci.
  Alternative Title : EUR J SOIL SCI
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 65 (1) Sequence Number: - Start / End Page: 83 - 95 Identifier: ISSN: 1351-0754