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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
16/09/2013 |
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Data da última atualização: |
19/02/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MORALES, M. M.; COMERFORD, N.; GUERRINI, I. A.; FALCÃO, N. P. S.; REEVES, J. B. |
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Afiliação: |
MARINA MOURA MORALES, CNPF; UNIVERSITY OF FLORIDA; UNESP; INPA; ENVIRONMENTAL MANAGEMENT AND BYPRODUCTS UTILIZATION LAB. |
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Título: |
Sorption and desorption of phosphate on biochar and biochar-soil mixtures. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Soil Use and Management, v. 29, p. 306-314, Sept. 2013. |
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Idioma: |
Inglês |
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Conteúdo: |
The term biochar refers to materials with diverse chemical, physical and physicochemical characteristics that have potential as a soil amendment. The purpose of this study was to investigate the P sorption/desorption properties of various slow biochars and one fast pyrolysis biochar and to determine how a fast pyrolysis biochar influences these properties in a degraded tropical soil. The fast pyrolysis biochar was a mixture of three separate biochars: sawdust, elephant grass and sugar cane leaves. Three other biochars were made by slow pyrolysis from three Amazonian tree species (Lacre, Inga and Embauba) at three temperatures of formation (400 °C, 500 °C, 600 °C). Inorganic P was added to develop sorption curves and then desorbed to develop desorption curves for all biochar situations. For the slow pyrolysis, the 600 ºC biochar had a reduced capacity to sorb P (4–10 times less) relative to those biochars formed at 400 °C and 500 °C. Conversely, biochar from Inga desorbed the most P. The fast pyrolysis biochar, when mixed with degraded tropical mineral soil, decreased the soil’s P sorption capacity by 55% presumably because of the high soluble, inorganic P prevalent in this biochar (909 mg P/kg of biochar). Phosphorus desorption from the fast pyrolysis biochar/soil mixture not only exhibited a common desorption curve but also buffered the soil solution at a value of ca. 0.2 mg/L. This study shows the diversity in P chemistry that can be expected when biochar is a soil amendment and suggests the potential to develop biochars with properties to meet specific objectives. MenosThe term biochar refers to materials with diverse chemical, physical and physicochemical characteristics that have potential as a soil amendment. The purpose of this study was to investigate the P sorption/desorption properties of various slow biochars and one fast pyrolysis biochar and to determine how a fast pyrolysis biochar influences these properties in a degraded tropical soil. The fast pyrolysis biochar was a mixture of three separate biochars: sawdust, elephant grass and sugar cane leaves. Three other biochars were made by slow pyrolysis from three Amazonian tree species (Lacre, Inga and Embauba) at three temperatures of formation (400 °C, 500 °C, 600 °C). Inorganic P was added to develop sorption curves and then desorbed to develop desorption curves for all biochar situations. For the slow pyrolysis, the 600 ºC biochar had a reduced capacity to sorb P (4–10 times less) relative to those biochars formed at 400 °C and 500 °C. Conversely, biochar from Inga desorbed the most P. The fast pyrolysis biochar, when mixed with degraded tropical mineral soil, decreased the soil’s P sorption capacity by 55% presumably because of the high soluble, inorganic P prevalent in this biochar (909 mg P/kg of biochar). Phosphorus desorption from the fast pyrolysis biochar/soil mixture not only exhibited a common desorption curve but also buffered the soil solution at a value of ca. 0.2 mg/L. This study shows the diversity in P chemistry that can be expected when biochar is a soil amendme... Mostrar Tudo |
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Palavras-Chave: |
Biocarvão. |
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Thesagro: |
Fósforo. |
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Thesaurus Nal: |
biochar; desorption; phosphorus; sorption. |
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Categoria do assunto: |
-- |
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Marc: |
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Registro original: |
Embrapa Florestas (CNPF) |
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| Registros recuperados : 3 | |
| 1. |  | BUDEL, J. M.; RAMAN, V.; MONTEIRO, L. M.; ALMEIDA, V. P.; BOBEK, V. B.; HEIDEN, G.; TAKEDA, I. J. M.; KHAN, I. A. Foliar anatomy and microscopy of six Brazilian species of Baccharis (Asteraceae). Microscopy Research and Tecnhnique, v. 81, p. 1-11, 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 2. | | BUDEL, J. M.; RAMAN, V.; MONTEIRO, L. M.; ALMEIDA, V. P.; BOBEK, V. B.; HEIDEN, G.; TAKEDA, I. J. M.; KHAN, I. A. Foliar Anatomy and Microscopy of Six Species of Baccharis (Asteraceae). In: ICSB, 18., Oxford, 2018.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 3. | | BUDEL, J. M.; WANG, M.; RAMAN, V.; ZHAO, J.; KHAN, S.; REHMAN, J. U.; TECHEN, N.; TEKWANI, B.; MONTEIRO, L. M.; HEIDEN, G.; TAKEDA, I. J. M.; FARAGO, P. V.; KHAN, I. A. Essential oils of five baccharis species: investigations on the chemical composition and biological activities. Molecules, v. 23, p. 1-19, 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Clima Temperado. |
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| Registros recuperados : 3 | |
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