Imaggeo On Monday: Carbon-sink

Imaggeo On Monday: Carbon-sink

Biochar is a carbon rich product of biomass pyrolysis, a process where biological material is exposed to high temperatures, in the absence of oxygen, to cause the decomposition of that material into various chemical and physical components. By going through this process, biochar can be a valuable soil additive and a carbon sink with a high potential to take up a wide variety of contaminants (through absorption or adsorption).


The influence of ageing processes on biochar properties are still the subject of intense research. To investigate the effect of ageing on biochar properties, in October 2015 soil samples were collected at an agricultural field site that was treated with biochar in March 2011. The black particles in the soil in this photograph are biochar. To learn more about this research, find the full publication of this study here.


Description by Gabriel Sigmund, modified from


Imaggeo is the EGU’s online open access geosciences image repository. All geoscientists (and others) can submit their photographs and videos to this repository and, since it is open access, these images can be used for free by scientists for their presentations or publications, by educators and the general public, and some images can even be used freely for commercial purposes. Photographers also retain full rights of use, as Imaggeo images are licensed and distributed by the EGU under a Creative Commons licence. Submit your photos at

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This guest post was contributed by a scientist, student or a professional in the Earth, planetary or space sciences. The EGU blogs welcome guest contributions, so if you've got a great idea for a post or fancy trying your hand at science communication, please contact the blog editor or the EGU Communications Officer to pitch your idea.

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