期刊
SOIL BIOLOGY & BIOCHEMISTRY
卷 43, 期 7, 页码 1615-1617出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2011.03.027
关键词
Pyrogenic matter; Soluble and colloidal fractions; Benzene polycarboxylic acids method
类别
资金
- Swiss National Foundation for Science
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 mu m) and colloidal fractions (0.45-5 mu m) extractable from a freshly pyrolysed charcoal and a 10 year old wildfire charcoal. These fractions represented a very small fraction (<2.7 g kg(-1)) of chars. The benzene polycarboxylic acids (BPCA) pattern indicated that 40-55 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. (C) 2011 Elsevier Ltd. All rights reserved.
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