Data/hora: 08/06/2024 04:25:41

Biblioteca(s): | Embrapa Instrumentação.
Data corrente: | 22/12/1999
Data da última atualização: | 02/03/2010
Autoria: | CRUVINEL, P. E.; NIELSEN, D. R.; CRESTANA, S.; FLOCCHINI, R. G.; MORALES, J. R.; MIRANDA, J.; KUSKO, B.
Afiliação: | EMBRAPA-CNPDIA; University of California; Universidad de Chile; Universidad Nacional de Mexico.
Título: | Studying the influence of the aggregate sizes on the trace elements of an ione oxisol with PIXE.
Ano de publicação: | 1991
Fonte/Imprenta: | In: CONGRESSO BRASILEIRO DE CIENCIA DO SOLO, 23., jul. 1991, Porto Alegre, RS. Programa e resumos... Porto Alegre: Sociedade Brasileira de Ciencia do Solo, 1991.
Páginas: | p.62.
Idioma: | Inglês
Notas: | Ref.018.
Conteúdo: | The retention of certain trace elements through a saturated aggregated oxisol was studied under different aggregate sizes using the proton induced X-ray emission (PIXE) technique. This analytical technique is based on the ionization of the soil sample atoms by the incidence of a proton beam, and the subsequent emission of X-rays characteristic of the elements present in the sample. The number of X-rays photons of a given element provides information on the amount of this element, up to one part in 10E9. The results obtained show that an increase in aggregate size from < 0,5mm to 1,0 -4,7mm affected significatively the relative amounts of Cl,K, and Ca. The presence of Cl and Ca was greatest in the small aggregate fractions. The presence of K was greatest in the large aggregate fractions. These results, in particular for Cl and Ca, are indeed applicable and related to those obtained by Nkedi-Kizza. His miscible displacement techniques revealed that the transport and retention of Cl and Ca through a saturated aggregate oxisol were influenced by the size of the aggregates within the particular soil column studied.
Palavras-Chave: | Aggregate; Influence; Ione; PIXE; Size.
Thesagro: | Oxisol.
Thesaurus Nal: | trace elements.
Categoria do assunto: | --
Registro original: | Embrapa Instrumentação (CNPDIA)
Exemplares: | CNPDIA - (5254-1) - UPC - SP - -- - PROCI-91.00024 -  - 1991.00024 - DIS