Partitioning of Microbially Respired CO 2 Between Indigenous and Exogenous Carbon Sources During Biochar Degradation Using Radiocarbon and Stable Carbon Isotopes
Bibliographic Data
| ID | 9243011 |
|---|---|
| Authors | Niels C Munksgaard (0000-0003-4906-1544), Anna V McBeath (0000-0003-1608-8150), Philippa L Ascough, Vladimir A Levchenko (0000-0002-3847-264X), Alan Williams (0000-0003-2032-1875), Michael I Bird (0000-0003-1801-8703) |
| Year | 2019 |
| Volume | 61 |
| Issue | 2 |
| Pages | 573-586 |
| Publication date | 2019-04-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Radiocarbon (JOURNAL) |
| Journal identifiers | ISSN: 0033-8222 • E-ISSN: 1945-5755 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.1017/rdc.2018.128 |
| OpenAlex | W2899570613 |
| Language | EN |
| References cited | 27 |
Pyrolized carbon in biochar can sequester atmospheric CO 2 into soil to reduce impacts of anthropogenic CO 2 emissions. When estimating the stability of biochar, degradation of biochar carbon, mobility of degradation products, and ingress of carbon from other sources must all be considered. In a previous study we tracked degradation in biochars produced from radiocarbon-free wood and subjected to different physico-chemical treatments over three years in a rainforest soil. Following completion of the field trial, we report here a series of in-vitro incubations of the degraded biochars to determine CO 2 efflux rates, 14 C concentration and δ 13 C values in CO 2 to quantify the contributions of biochar carbon and other sources of carbon to the CO 2 efflux. The 14 C concentration in CO 2 showed that microbial degradation led to respiration of CO 2 sourced from indigenous biochar carbon (≈0.5–1.4 μmoles CO 2 /g biochar C/day) along with a component of carbon closely associated with the biochars but derived from the local environment. Correlations between 14 C concentration, δ 13 C values and Ca abundance indicated that Ca 2+ availability was an important determinant of the loss of biochar carbon
Biochar · Carbon cycle · Carbon dioxide · Carbon fibers · Carbon sequestration · Charcoal · Ecosystem · Isotopes of carbon · Pyrolysis · Radiocarbon dating · Total organic carbon · Chemistry · Materials Science · Microbial bioremediation and biosurfactants · Soil Carbon and Nitrogen Dynamics · Toxic Organic Pollutants Impact · Ecology · Environmental Chemistry · Geology · Organic Chemistry
Ashes to ashes, charcoal to dust
Preservation potential of charcoal in alkaline environments
Radiocarbon Dating of “Old” Charcoal Using a Wet Oxidation, Stepped-Combustion Procedure
Structural Characterization of Charcoal Exposed to High and Low Ph
Quantifying Charcoal Degradation and Negative Priming of Soil Organic Matter with a 14 C-Dead Tracer
Progress in Radiocarbon Target Preparation at the Antares AMS Centre
The Use of Raman Spectroscopy to Monitor the Removal of Humic Substances from Charcoal
| Citation velocity | historical |
|---|---|
| Highly cited | No |