| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Agrobiologia. |
|
Data corrente: |
12/12/2024 |
|
Data da última atualização: |
12/12/2024 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
SOUSA, E. B. de; NETTO-FERREIRA, J. B.; BARRA, C. M.; ALVES, B. J. R.; Lã, O. R; ROCHA JUNIOR, J. G. |
|
Afiliação: |
ÉRICA B. DE SOUSA, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; JULIA B. NETTO FERREIRA, UNIVERSITY OF FLORIDA; CRISTINA M. BARRA, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; BRUNO JOSE RODRIGUES ALVES, CNPAB; OTAVIO R. LÃ, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; JOSÉ G ROCHA JUNIO, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO. |
|
Título: |
Sustainable wet method for determination of total organic carbon in soils using potassium permanganate as a substitute for potassium dichromate. |
|
Ano de publicação: |
2024 |
|
Fonte/Imprenta: |
Journal of Soil Science and Plant Nutrition, Publishd online 20 november, 2024. |
|
ISSN: |
0718-9508 |
|
DOI: |
10.1007/s42729-024-02135-8 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Purpose: Official methods for determining total organic carbon (TOC) in soils use wet oxidation with K2Cr2O7, which generates hazardous waste and requires large amounts of concentrated H2SO4, while dry combustion methods with elemental analyzers, although more environmentally friendly and accurate, are costly. This work proposes a new method to mitigate the environmental impacts and costs of determining TOC in soils. Methods: It involves the oxidation of TOC by KMnO4 with the spectrophotometric determination of residual KMnO4. The experimental parameters for oxidation were optimized, establishing a reaction time of 30 min, a temperature of 95 ºC, and 0.125 mol L-1 H2SO4. Results: The oxidizability of a series of organic compounds against KMnO4 and K2Cr2O7 was similar. The appropriate soil mass for the KMnO4 method was defined as 500 mg. Satisfactory linear correlations were observed between the TOC levels obtained using both the KMnO4 method (r = 0.975) and the K2Cr2O7 method (r = 0.972) in relation to the reference (dry combustion) across the analysis of 16 soil samples. Conclusions: The KMnO4 method stood out for its simplicity, reliability, lower cost, and greater safety for the environment and the analyst compared to the K2Cr2O7 method |
|
Palavras-Chave: |
Dry combustion; Total Organic Carbon; Yeomans Bremner. |
|
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
Marc: |
LEADER 02067naa a2200241 a 4500
001 2170593
005 2024-12-12
008 2024 bl uuuu u00u1 u #d
022 $a0718-9508
024 7 $a10.1007/s42729-024-02135-8$2DOI
100 1 $aSOUSA, E. B. de
245 $aSustainable wet method for determination of total organic carbon in soils using potassium permanganate as a substitute for potassium dichromate.$h[electronic resource]
260 $c2024
520 $aPurpose: Official methods for determining total organic carbon (TOC) in soils use wet oxidation with K2Cr2O7, which generates hazardous waste and requires large amounts of concentrated H2SO4, while dry combustion methods with elemental analyzers, although more environmentally friendly and accurate, are costly. This work proposes a new method to mitigate the environmental impacts and costs of determining TOC in soils. Methods: It involves the oxidation of TOC by KMnO4 with the spectrophotometric determination of residual KMnO4. The experimental parameters for oxidation were optimized, establishing a reaction time of 30 min, a temperature of 95 ºC, and 0.125 mol L-1 H2SO4. Results: The oxidizability of a series of organic compounds against KMnO4 and K2Cr2O7 was similar. The appropriate soil mass for the KMnO4 method was defined as 500 mg. Satisfactory linear correlations were observed between the TOC levels obtained using both the KMnO4 method (r = 0.975) and the K2Cr2O7 method (r = 0.972) in relation to the reference (dry combustion) across the analysis of 16 soil samples. Conclusions: The KMnO4 method stood out for its simplicity, reliability, lower cost, and greater safety for the environment and the analyst compared to the K2Cr2O7 method
653 $aDry combustion
653 $aTotal Organic Carbon
653 $aYeomans Bremner
700 1 $aNETTO-FERREIRA, J. B.
700 1 $aBARRA, C. M.
700 1 $aALVES, B. J. R.
700 1 $aLã, O. R
700 1 $aROCHA JUNIOR, J. G.
773 $tJournal of Soil Science and Plant Nutrition, Publishd online 20 november, 2024.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agrobiologia (CNPAB) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 1 | |
| 1. |  | CARNEIRO, J. R.; PEREIRA, E. CALIL, F.; FERREIRA, W. A.; ROCHA, I. P. Efeito das Diferentes Épocas e do Número de Medicações com Oxfendazole em Bezerros da Raça Nelore em Goiás. Pesquisa Agropecuária Brasileira, Brasília, v.23, n.1, p.75-79, jan. 1988.| Biblioteca(s): Embrapa Unidades Centrais. |
|   |
| Registros recuperados : 1 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
