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Chemical characterization of rice straw-derived biochar for soil amendment
- Source :
-
Biomass & Bioenergy . Dec2012, Vol. 47, p268-276. 9p. - Publication Year :
- 2012
-
Abstract
- Abstract: Pyrolysis of rice straw to create biochar for soil amendment appears to be a promising method to address concerns with regard to improving soil fertility, increasing Carbon storage and decreasing Green House Gas emissions. However, the ability of rice straw-derived biochar to affect these factors might vary depending on its characteristics. It is therefore essential to investigate the properties before large-scale application of rice straw-derived biochar. In this study, rice straw-derived biochars produced at different temperatures (300, 400, 500, 600 & 700 °C) and residence time (1, 2, 3 & 5 h) were characterized using a suite of analytical techniques. Results showed that pyrolysis temperature had a greater influence than residence time on the chemical composition and structure of rice straw-derived biochar produced at low heating rate. The rice straw-derived biochars especially produced at 400 °C had high alkalinity and cation exchange capacity, and high levels of available phosphorus and extractable cations. These properties indicate potential application of rice straw-derived biochar as a fertilizer and soil amendment. Fourier transform infrared spectra showed that higher pyrolysis temperatures promote condensation reactions. Rice straw-derived biochars contained turbostratic crystallites at 400 °C, and displayed a high level of aromatization at 500 °C. Increasing charring temperature will increase the aromaticity of biochar, and might include its recalcitrance. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09619534
- Volume :
- 47
- Database :
- Academic Search Index
- Journal :
- Biomass & Bioenergy
- Publication Type :
- Academic Journal
- Accession number :
- 83929779
- Full Text :
- https://doi.org/10.1016/j.biombioe.2012.09.034