Quantitative differentiation between soil organic carbon and biochar carbon in Aridisol
Open accessAbstract
To understand the effect of biochar, identify its presence and quantify its stability in soil, it is necessary to differentiate between the two main sources of carbon. These sources are resident soil organic matter and biochar, which is produced by burning organic matter under low oxygen concentration in a process known as pyrolysis. The present study employs solid-liquid extraction with an alkaline solution, the efficiency of which was improved by a reflux system and quantification using the modified Walkley-Black method, to distinguish the two carbon sources in samples of arid soils from the area surrounding the city of Arica, XV region of Chile. The mean annual precipitation of this area is less than 0.4 mm, and its soils are characterized by high salinity, low organic matter content, high porosity and low bulk density. The values for total extracted organic carbon obtained using this method were very similar to those for the resident soil organic carbon, indicating that the technique extracts mostly resident soil organic carbon and not biochar carbon. Biochar carbon represented less than 6% of the total organic carbon extracted by the method. The results demonstrate that this method can quantitatively differentiate between resident total organic carbon and applied biochar carbon. The method thus represents a valuable alternative to the use of an elemental analyzer
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The spectra of biochar proved the presence of carbon and oxygen functional groups such as -OH, aliphatic, C=O, aromatic ring, and etheric C-O-C group.
“The spectra of biochar proved the presence of carbon and oxygen functional groups such as -OH (at 3405 cm -1 ), aliphatic (2920 cm -1 ), C=O (1617 cm -1 ), aromatic ring (1384 cm -1 ), and etheric C-O-C group (1088 cm -1 ) [48].”
From Application of Biochar in Stormwater Treatment: Experimental and Modeling Investigation (2021) · cites this paper as [48]
Table 2, reproduced in the ‘Amounts of TOC from soil, humic acid, biochar and humidified soils’ section (page unavailable), identifies all five functional groups in the biochar’s FTIR spectra. The citing sentence’s etheric C-O-C value of 1088 cm⁻¹ is not supported: the table gives 1115–1130 cm⁻¹. It also gives 1385 cm⁻¹, rather than 1384 cm⁻¹, for the aromatic C-C group. (LLM, conf=0.90)
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Research works printed but not linked: 3
- Chiaa, Ch., P. Munroe, Y. Lina, and S. Joseph. 2010. Microscopic characterisation of synthetic Terra Preta. Australian J. of Soil Res. 48(6-7):593-605.
- INGENDESA. 1993. Consultoría Dep-012, Análisis de descontaminación y embalse en río Lluta". INGENDESA (Empresa de Ingeniería de Ende- sa). Vol. 4/4-Dirección de Riego. Ministerio de Obras Públicas. 111 pp.
- Manning, D. A. C., and E. Lopez-Capel. 2009. Test procedures for determining the quantity of bio- char within soils. In: Lehmann, J. and S. Joseph (ed.). Biochar for environmental management. Editorial London -Sterling, VA. p. 301-315.
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Application of Biochar in Stormwater Treatment: Experimental and Modeling Investigation
Hasan, M. S., Vasquez, R., & Geza, M. (2021) · Processes · doi:10.3390/pr9050860 · Cited by 16 · see citing works
- Authors
- Lara, N., Figueroa, L., Carvajal, F., Zapata, Y., Urbina, C., & Escobar, H.
- Affiliations
- University of Tarapacá (CL)
- Venue
- International Journal of Agriculture and Natural Resources
- Published
- 2013-08-31
- Volume
- 40
- Issue
- 2
- Pages
- 387-395
- ISSN
- 0304-5609 (ISSN-L)
- 2452-5731
- OpenAlex
- W2747587261
- Cited by
- 5
- References
- 0
- Citations by year
- 2026: 1 · 2024: 1 · 2023: 1 · 2022: 1 · 2021: 1
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- cc-by-nc
- Locations
- International Journal of Agriculture and Natural Resources (publishedVersion, cc-by-nc)
- LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (publishedVersion, other-oa)
- Americanae (AECID Library) (submittedVersion, cc-by-nc)
- Dialnet (Universidad de la Rioja) (submittedVersion)
- Dialnet (Universidad de la Rioja)
- Funders
- Universidad de Tarapacá
- Topics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
- Physical Sciences › Environmental Science › Global and Planetary Change › Fire effects on ecosystems
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil erosion and sediment transport
- Keywords
- biochar, soil organic carbon, Aridisols, alkaline extraction, solid-liquid extraction, Walkley-Black method, pyrolysis, arid soils, soil salinity, biochar stability
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