The different faces of Biochar: contamination risk versus remediation tool

    Isabel Hilber Info
    Ana Catarina Bastos Info
    Susana Loureiro Info
    Gerhard Soja Info
    Aleksandra Marsz Info
    Gerard Cornelissen Info
    Thomas D. Bucheli Info

Abstract

This article reviews the different aspects of biochar as source and sink of organic and inorganic contaminants. Biochar can contain organic contaminants such as polycyclic aromatic hydrocarbons or heavy metals. As the distribution coefficients of the biochar especially for contaminants are high, the freely dissolved concentrations are low and with that also the bioavailability. The link between biochar’s inherent contaminants and toxicity to soil meso– and macro–fauna remains unclear, with data being often contradictory and influenced by feedstock and pyrolysis conditions. The biochar’s potential to remediate contaminated soils has mainly been addressed in lab studies, but rarely in the field. This far, results have been contradicting. Many studies reported successful immobilization of contaminants but some not. In summary, the ambivalent face of the biochar with regard to contaminants prevails. In future, long term field studies are needed to properly address the sustainability of biochar in this respect.

First published online: 02 Feb 2017

Keywords:

biochar inherent organic and inorganic contaminants, bioavailability, bioaccessibility, ecotoxicity, environ- mental risks

How to Cite

Hilber, I., Bastos, A. C., Loureiro, S., Soja, G., Marsz, A., Cornelissen, G., & Bucheli, T. D. (2017). The different faces of Biochar: contamination risk versus remediation tool. Journal of Environmental Engineering and Landscape Management, 25(2), 86-104. https://doi.org/10.3846/16486897.2016.1254089

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June 28, 2017
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Published

2017-06-28

How to Cite

Hilber, I., Bastos, A. C., Loureiro, S., Soja, G., Marsz, A., Cornelissen, G., & Bucheli, T. D. (2017). The different faces of Biochar: contamination risk versus remediation tool. Journal of Environmental Engineering and Landscape Management, 25(2), 86-104. https://doi.org/10.3846/16486897.2016.1254089

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