Data/hora: 02/06/2024 01:49:29

Biblioteca(s): | Embrapa Milho e Sorgo.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 2
Data corrente: | 04/12/2019
Data da última atualização: | 04/12/2019
Autoria: | PETTER, F. A.; FERREIRA, T. S.; SINHORIN, A. P.; LIMA, L. B.; ALMEIDA, F. A.; PACHECO, L. P.; SILVA, A. F. da.
Afiliação: | Fabiano A. Petter, Universidade Federal de Mato Grosso; Tamara S. Ferreira, Universidade Federal do Piauí; Adilson P. Sinhorin, Universidade Federal de Mato Grosso; Larissa B. Lima, Universidade Federal de Mato Grosso; Fernandes A. Almeida, Universidade Federal do Piauí; Leandro P. Pacheco, Universidade Federal de Mato Grosso; ALEXANDRE FERREIRA DA SILVA, CNPMS.
Título: | Biochar increases diuron sorption and reduces the potential contamination of subsurface water with diuron in a sandy soil.
Ano de publicação: | 2019
Fonte/Imprenta: | Pedosphere, v. 29, n. 6, p. 801-809, 2019.
DOI: | 10.1016/S1002-0160(17)60434-X
Idioma: | Inglês
Conteúdo: | The herbicide diuron is widely used in agricultural areas in Brazil, whereas it has high potential for subsurface water contamination due to its physicochemical characteristics. Recent studies have demonstrated the potential of biochar as a sorbent and possible pesticide leaching mitigation. The objective of this study was to investigate the long-term e&#64256;ect of biochar application on the kinetics of sorption and desorption of diuron in a Cerrado Haplic Plinthosol. Samples were collected in an experiment conducted in the &#64257;eld in a randomized block design consisting of the combination of two levels of fertilizer application (0 and 300 kg ha&#8722;1 of 5-25-15 formula of NPK fertilizers) and three doses of biochar (0, 16, and 32 Mg ha&#8722;1). The Freundlich isotherm accurately described the sorption of diuron in all treatments. Biochar application increased the sorption and reduced the desorption of diuron. This e&#64256;ect was attributed to the contribution of biochar to total organic carbon (C) and C in the humin fraction and to the increase in the reactivity of the humic acid and humin fractions, which was signi&#64257;cantly highly correlated with the sorption coe&#64259;cient (Kf). A positive correlation between the partition coe&#64259;cient of organic C and Kf con&#64257;rmed the importance of the soil organic compartment for the sorption of diuron. The higher diuron sorption and lower diuron desorption capacities of sandy soils after biochar application could reduce the potential risk of diuron leaching and contamination of subsurface water.
Palavras-Chave: | Carbono pirogênico; Coeficiente de partição; Coeficiente de sorção; Persistência.
Thesagro: | Herbicida; Lixiviação; Matéria Orgânica; Solo.
Categoria do assunto: | H Saúde e Patologia
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (29037-1) - UPC - AP - DD -  -  -  - DIS