期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 403, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.123833
关键词
biochar; ecotoxicity; PAHs; potentially toxic elements; soil; fertilizers
资金
- National Science Centre [DEC-2018/31/N/ST10/01588]
- National Research Foundation of Korea (NRF) [NRF-2015R1A2A2A11001432]
- NRF Germany-Korea Partnership Program (GEnKO Program)
Biochar has great potential for environmental and agricultural applications, but caution is needed as it may contain harmful substances that can negatively impact organisms. Factors such as feedstock, pyrolysis temperature, and contaminants content play a crucial role in determining the toxicity of biochar.
Biochar, a product of biomass pyrolysis, is characterized by significant surface area, porosity, high water holding capacity, and environmental persistence. It is perceived as a material that can counteract climate change due to its high carbon stability and is also considered suitable for soil amendment (fertility improvement, soil remediation). However, biochar can have a toxic effect on organisms as harmful substances may be present in it. This paper reviews the literature regarding the current knowledge of harmful substances in biochar and their potential negative impact on organisms from different trophic levels. The effects of biochar on the content and toxicity of harmful substances in biochar-amended soils are also reviewed. Application of biochar into soil does not usually have a toxic effect and very often stimulate plants, bacteria activity and invertebrates. The effect however is strictly determined by type of biochar (especially the feedstock used and pyrolysis temperature) as well as contaminants content. The pH, electrical conductivity, polycyclic aromatic hydrocarbons as well as heavy metals are the main factor usually responsible for biochar toxicity.
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