Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/16210
Title: Chemical and structural analysis of enhanced biochars: Thermally treated mixtures of biochar, chicken litter, clay and minerals
Contributor(s): Lin, Yun (author); Munroe, Paul (author); Joseph, Stephen (author); Ziolkowski, A (author); Van Zwieten, Lukas  (author); Kimber, Stephen (author); Rust, J (author)
Publication Date: 2013
DOI: 10.1016/j.chemosphere.2012.11.063
Handle Link: https://hdl.handle.net/1959.11/16210
Abstract: In this study biochar mixtures comprising a Jarrah-based biochar, chicken litter (CL), clay and other minerals were thermally treated, via torrefaction, at moderate temperatures (180 and 220 °C). The objectives of this treatment were to reduce N losses from CL during processing and to determine the effect of both the type of added clay and the torrefaction temperature on the structural and chemical properties of the final product, termed as an enhanced biochar (EB). Detailed characterisation indicated that the EBs contained high concentrations of plant available nutrients. Both the nutrient content and plant availability were affected by torrefaction temperature. The higher temperature (220 °C) promoted the greater decomposition of organic matter in the CL and dissociated labile carbon from the Jarrah-based biochar, which produced a higher concentration of dissolved organic carbon (DOC). This DOC may assist to solubilise mineral P, and may also react with both clay and minerals to block active sites for P adsorption. This subsequently resulted in higher concentrations of plant available P. Nitrogen loss was minimised, with up to 73% of the initial total N contained in the feedstock remaining in the final EB. However, N availability was affected by both torrefaction temperature and the nature of the clay minerals added
Publication Type: Journal Article
Source of Publication: Chemosphere, 91(1), p. 35-40
Publisher: Pergamon Press
Place of Publication: United Kingdom
ISSN: 0045-6535
1879-2198
Field of Research (FOR): 050301 Carbon Sequestration Science
050304 Soil Chemistry (excl Carbon Sequestration Science)
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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