Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/21092
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Metal contaminated biochar and wood ash negatively affect plant growth and soil quality after land application
Authors: Jones, David L
Quilliam, Richard
Contact Email: richard.quilliam@stir.ac.uk
Keywords: CCA treated wood
Microbial activity
pH
Liming
Hazard assessment
Root growth inhibition
Issue Date: 15-Jul-2014
Publisher: Elsevier
Citation: Jones DL & Quilliam R (2014) Metal contaminated biochar and wood ash negatively affect plant growth and soil quality after land application, Journal of Hazardous Materials, 276, pp. 362-370.
Abstract: Pyrolysis or combustion of waste wood can provide a renewable source of energy and produce byproducts which can be recycled back to land. To be sustainable requires that these byproducts pose minimal threat to the environment or human health. Frequently, reclaimed waste wood is contaminated by preservative-treated timber containing high levels of heavy metals. We investigated the effect of feedstock contamination from copper-preservative treated wood on the behaviour of pyrolysis-derived biochar and combustion-derived ash in plant-soil systems. Biochar and wood ash were applied to soil at typical agronomic rates. The presence of preservative treated timber in the feedstock increased available soil Cu; however, critical Cu guidance limits were only exceeded at high rates of feedstock contamination. Negative effects on plant growth and soil quality were only seen at high levels of biochar contamination (>50% derived from preservative-treated wood). Negative effects of wood ash contamination were apparent at lower levels of contamination (>10% derived from preservative treated wood). Complete removal of preservative treated timber from wood recycling facilities is notoriously difficult and low levels of contamination are commonplace. We conclude that low levels of contamination from Cu-treated wood should pose minimal environmental risk to biochar and ash destined for land application.
Type: Journal Article
URI: http://hdl.handle.net/1893/21092
DOI Link: http://dx.doi.org/10.1016/j.jhazmat.2014.05.053
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Bangor University
Biological and Environmental Sciences

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