Header

UZH-Logo

Maintenance Infos

Synthesis and characterisation of laboratory-charred grass straw (Oryza sativa) and chestnut wood (Castanea sativa) as reference materials for black carbon quantification


Hammes, Karen; Smernik, Ronald J; Skjemstad, Jan O; Herzog, Andreas; Vogt, Ulrich F; Schmidt, Michael W I (2006). Synthesis and characterisation of laboratory-charred grass straw (Oryza sativa) and chestnut wood (Castanea sativa) as reference materials for black carbon quantification. Organic Geochemistry, 37(11):1629-1633.

Abstract

We synthesised large (~2 kg) quantities of two chars for use as commercially available reference materials for the quantification of black carbon (BC). We pyrolysed chestnut wood (Castanea sativa) and grass straw (Oryza sativa) at 450 °C under a N2 atmosphere, which mimics the oxygen-free conditions on the inside of burning material at a moderate burning temperature. The charred materials were dominated by aromatic carbon (~70%), had low H/C (~0.7) and O/C (~0.3) ratios and low surface areas (2–6 m² g⁻¹). Isotopic changes on charring were small (≤0.3‰). In these respects, the synthesised chars were similar to chars produced at low temperature (<500 °C) in natural fires and thus may prove to be appropriate materials for calibrating BC quantification methods. Both chars have been used in a comparative study of BC quantification.

Abstract

We synthesised large (~2 kg) quantities of two chars for use as commercially available reference materials for the quantification of black carbon (BC). We pyrolysed chestnut wood (Castanea sativa) and grass straw (Oryza sativa) at 450 °C under a N2 atmosphere, which mimics the oxygen-free conditions on the inside of burning material at a moderate burning temperature. The charred materials were dominated by aromatic carbon (~70%), had low H/C (~0.7) and O/C (~0.3) ratios and low surface areas (2–6 m² g⁻¹). Isotopic changes on charring were small (≤0.3‰). In these respects, the synthesised chars were similar to chars produced at low temperature (<500 °C) in natural fires and thus may prove to be appropriate materials for calibrating BC quantification methods. Both chars have been used in a comparative study of BC quantification.

Statistics

Citations

113 citations in Web of Science®
118 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

2 downloads since deposited on 25 Mar 2013
0 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Date:2006
Deposited On:25 Mar 2013 11:04
Last Modified:05 Apr 2016 16:43
Publisher:Elsevier
ISSN:0146-6380
Publisher DOI:https://doi.org/10.1016/j.orggeochem.2006.07.003

Download

Preview Icon on Download
Content: Published Version
Filetype: PDF - Registered users only
Size: 217kB
View at publisher