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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

offee industry waste-derived biochar: characterization and agricultural use evaluation according to Brazilian legislatio

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Author(s):
Carnier, Ruan [1] ; Coscione, Aline Renee [2] ; Delaqua, Douglas [1] ; de Abreu, Cleide Aparecida [2]
Total Authors: 4
Affiliation:
[1] Inst Agron Estado Sao Paulo, Programa Posgrad Agr Trop & Subtrop, Gestao Recursos Agroambientais, Campinas, SP - Brazil
[2] Inst Agron Estado Sao Paulo, Ctr Solos & Recursos Ambientais, Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Bragantia; v. 80, 2021.
Web of Science Citations: 0
Abstract

The agricultural use of biochar has been the focus of much research in the last decade due to the improvement of soil chemical, physical, and biological attributes. Nonetheless, Brazil still has no specific legislation for biochar, limiting its agricultural use. The objective of the present work is to evaluate the use of biochar produced from spent coffee grounds (SCG) and coffee parchment (CP) by slow pyrolysis at 700 degrees C according to the existing framework of the Brazilian Ministry of Agriculture, Livestock, and Food Supply (MAPA) legislation for organic fertilizer, soil conditioner or plant substrate. Biochar was characterized according to normative instructions No. 17, 31, 61, 7, 5 and 35. Although not required by the addressed legislation, the semitotal content of macro- and micronutrients was also determined. While CP biochar could be used as an organic fertilizer or plant substrate, SCG biochar, due to its higher Ni content and lower than required cation exchange capacity (CEC), did not meet MAPA legislation criteria to allow for its agricultural use. Future regulation scan be based on the current standards, and structural attributes, such as total C content, particle size distribution, and complete macro-and micronutrient determination should be included. Further research may also indicate the viability of biochar use as a soil conditioner based on a more representative set of biomasses with a higher CEC. These considerations will help to take advantage of the benefits of biochar to soil, contributing to a circular economy, which is still at a difficult stage in Brazil. (AU)

FAPESP's process: 16/19368-6 - Biochars to improve the quality of soils contaminated with heavy metals
Grantee:Cleide Aparecida de Abreu
Support Opportunities: Regular Research Grants