Data/hora: 11/06/2024 04:53:01

Biblioteca(s): | Embrapa Agrossilvipastoril; Embrapa Florestas.
Data corrente: | 30/03/2021
Data da última atualização: | 31/03/2021
Autoria: | MORALES, M. M.; COMERFORD, n. b.; BEHLING, M.; ABREU, D. C. de; GUERRINI, I. A.
Afiliação: | MARINA MOURA MORALES, CNPF; NICHOLAS BRIAN COMERFORD, University of Hawaii; MAUREL BEHLING, CPAMT; DANIEL CARNEIRO DE ABREU, UFMT; IRAÊ AMARAL GUERRINI, UNESP.
Título: | Biochar chemistry in a weathered tropical soil: kinetics of phosphorus sorption.
Ano de publicação: | 2021
Fonte/Imprenta: | Agriculture, v. 11, n. 4, 295, 2021. 13 p.
DOI: | https://doi.org/10.3390/agriculture11040295
Idioma: | Inglês
Conteúdo: | The phosphorus (P) chemistry of biochar (BC)-amended soils is poorly understood. This statement is based on the lack of published research attempting a comprehensive characterization of biochar?s influence on P sorption. Therefore, this study addressed the kinetic limitations of these processes. This was accomplished using a fast pyrolysis biochar made from a mix of waste materials applied to a highly weathered Latossolo Vermelho distrofico (Oxisol) from São Paulo, Brazil. Standard method (batch method) was used. The sorption kinetic studies indicated that P sorption in both cases, soil (S) and soil-biochar (SBC), had a relatively fast initial reaction between 0 to 5 min. This may have happened because adding biochar to the soil decreased P sorption capacity compared to the mineral soil alone. Presumably, this is a result of: (i) Inorganic phosphorus desorbed from biochar was resorbed onto the mineral soil; (ii) charcoal particles physically covered P sorption locations on soil; or (iii) the pH increased when BC was added SBC and the soil surface became more negatively charged, thus increasing anion repulsion and decreasing P sorption.
Palavras-Chave: | Batch method; Fast pyrolysis; P retention; Pirólise rápida; Retenção de fósforo.
Thesaurus Nal: | Biochar.
Categoria do assunto: | W Química e Física
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/222240/1/Marina-MORALES-et-al.-2021-Agriculture.pdf
Registro original: | Embrapa Florestas (CNPF)

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CPAMT - (1620-1) - UPC - AP - DD -  -  -  - DIS