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http://hdl.handle.net/1843/51792| Type: | Artigo de Periódico |
| Title: | Structural and elemental analysis of biochars in the search of a synthetic path to mimetize anthropic Amazon soils |
| Authors: | Sugandha Dogra Pandey Fernanda Gomes de Mendonça Márcio Neves Rodrigues Beatriz Palhares Zschaber Faria João Luiz Elias Campos Igor Forattini Prates Carvalhais Noronha Sara Silveira Vieira Nadiene Aparecida do Vale Santos Luiz Arnaldo Fernandes Regynaldo Arruda Sampaio Fernando Colen Zuy Maria Magriotis Ado Jorio |
| Abstract: | In this work, chemical and structural properties of various biochars were analyzed and compared with those from a highly stable anthropic soil, Terra Preta de Índio (TPI). TPI is believed to be responsible for the fertility of Amazonian soils and their stability; therefore, the production of a synthetic TPI would be of great interest for agricultural applications. Biochar produced from different raw biomasses were comprehensively characterized and, based on the obtained results, a preliminary study was performed testing three different routes of chemical activation using nitric acid, phosphoric acid, and potassium hydroxide as activating agents. After chemical activations, metal contents in the biochars decreased, as expected, and high degrees of carbonization were observed. In the case of the activation performed with HNO3, intense signals related to carboxylic groups in TG-MS analysis and in potentiometric titrations point out to a highly oxygenated biochar. Structural analysis showed that activations generated point defects in sp2-carbon structures of biochar, with the material obtained after KOH activation showing a high surface area (569 m2 g−1), an important feature for the use as soil amendment. |
| Subject: | Carvão vegetal Terra preta Raman, Espectroscopia de Carbono |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS ICX - DEPARTAMENTO DE FÍSICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1016/j.jenvman.2020.111685 |
| URI: | http://hdl.handle.net/1843/51792 |
| Issue Date: | Feb-2021 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S0301479720316108 |
| metadata.dc.relation.ispartof: | Journal of Environmental Management |
| Appears in Collections: | Artigo de Periódico |
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