Cited by 1,714Soil Carbon and Nitrogen DynamicsThermochemical Biomass Conversion ProcessesFire effects on ecosystems

Bio-energy in the black

Open access
Lehmann, Johannes·2007·Frontiers in Ecology and the Environment

Abstract

At best, common renewable energy strategies can only offset fossil fuel emissions of CO2 – they cannot reverse climate change. One promising approach to lowering CO2 in the atmosphere while producing energy is biochar bio-energy, based on low-temperature pyrolysis. This technology relies on capturing the off-gases from thermal decomposition of wood or grasses to produce heat, electricity, or biofuels. Biochar is a major by-product of this pyrolysis, and has remarkable environmental properties. In soil, biochar was shown to persist longer and to retain cations better than other forms of soil organic matter. The precise half-life of biochar is still disputed, however, and this will have important implications for the value of the technology, particularly in carbon trading. Furthermore, the cation retention of fresh biochar is relatively low compared to aged biochar in soil, and it is not clear under what conditions, and over what period of time, biochar develops its adsorbing properties. Research is still needed to maximize the favorable attributes of biochar and to fully evaluate environmental risks, but this technology has the potential to provide an important carbon sink and to reduce environmental pollution by fertilizers.

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Crossref · 10.1890/1540-9295(2007)5[381:bitb]2.0.co;2

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  • Biochar may offer the chance to adsorb and retain plant nutrients and improve soil fertility.

    “Biochar is a carbonaceous porous material obtained by pyrolysis of biomasses, and may offer the chance to adsorb and retain plant nutrients and improve soil fertility4.”

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Research works printed but not linked: 3

  1. IPCC (Intergovernmental Panel on Climate Change). 2001. Climate change 2001: the scientific basis. Technical summary by Workgroup I of the Intergovernmental Panel on Climatic Change. Cambridge, UK: Cambridge University Press.
  2. Lehmann J, Gaunt J, and Rondon M. 2006. Biochar sequestration in terrestrial ecosystems: a review. Mitig Adapt Strategy Global Change 1 11 1: 403-27.
  3. Rondon M, Ramirez JA, and Lehmann J. 2005. Charcoal additions reduce net emissions of greenhouse gases to the atmosphere. In: Proceedings of the 3rd USDA Symposium on Greenhouse Gases and Carbon Sequestration in Agriculture and Forestry; 2005 Mar 21-24; Baltimore, MD. Baltimore, MD: University of Delaware. p 208.

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Authors
Lehmann, J.
Affiliations
Cornell University (US)
Corresponding author
Lehmann, Johannes
Venue
Frontiers in Ecology and the Environment
Publisher
Wiley
Published
2007-09
Volume
5
Issue
7
Pages
381-387
ISSN
1540-9295 (ISSN-L)
OpenAlex
W2080539324
Cited by
1,714
References
36
Citations by year
2026: 52 · 2025: 62 · 2024: 82 · 2023: 98 · 2022: 84 · 2021: 116 · 2020: 145 · 2019: 125 · 2018: 115 · 2017: 122 · 2016: 94 · 2015: 114 · 2014: 127 · 2013: 105 · 2012: 97
FWCI
56.27
Type
journal article
Language
en
Open access
Locations
Frontiers in Ecology and the Environment (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
  • Physical Sciences › Environmental Science › Global and Planetary Change › Fire effects on ecosystems
Keywords
biochar, bioenergy, low-temperature pyrolysis, carbon sequestration, carbon sink, cation retention, soil organic matter, emissions trading, CO2 emissions, environmental risk, fertilizer pollution

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