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Pyrogenic carbon soluble fraction is larger and more aromatic in aged charcoal than in fresh charcoal


Abiven, S; Hengartner, P; Schneider, M P W; Singh, N; Schmidt, M W I (2011). Pyrogenic carbon soluble fraction is larger and more aromatic in aged charcoal than in fresh charcoal. Soil Biology and Biochemistry, 43(7):1615-1617.

Abstract

Recent studies show that pyrogenic matter is one of the most stable compounds in the soil but less inert than previously expected. One potential pathway yielding losses from soil is solubilisation of pyrogenic compounds. In batch experiments, we estimated the proportion and molecular composition of soluble (<0.45 mm) and colloidal fractions (0.45e5 mm) extractable from a freshly pyrolysed charcoal and a 10 year old wild␣re charcoal. These fractions represented a very small fraction (<2.7 g kg␣1) of chars. The benzene polycarboxylic acids (BPCA) pattern indicated that 40e55 times more condensed structures were released from the aged char than from the fresh char. This study shows that the soluble fraction of the char is small, and tends to increase with the residence time in the soil.

Recent studies show that pyrogenic matter is one of the most stable compounds in the soil but less inert than previously expected. One potential pathway yielding losses from soil is solubilisation of pyrogenic compounds. In batch experiments, we estimated the proportion and molecular composition of soluble (<0.45 mm) and colloidal fractions (0.45e5 mm) extractable from a freshly pyrolysed charcoal and a 10 year old wild␣re charcoal. These fractions represented a very small fraction (<2.7 g kg␣1) of chars. The benzene polycarboxylic acids (BPCA) pattern indicated that 40e55 times more condensed structures were released from the aged char than from the fresh char. This study shows that the soluble fraction of the char is small, and tends to increase with the residence time in the soil.

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Additional indexing

Item Type:Journal Article, refereed, further contribution
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Date:2011
Deposited On:29 Nov 2011 14:23
Last Modified:05 Apr 2016 15:07
Publisher:Elsevier
ISSN:0038-0717
Publisher DOI:https://doi.org/10.1016/j.soilbio.2011.03.027
Permanent URL: https://doi.org/10.5167/uzh-51352

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