Data/hora: 09/06/2024 10:31:49

Provedor de dados: 	70	
País: 	Brazil	
Título: 	Use of nuclear technique in samples for agricultural purposes	
Autores: 	Oliveira,Kerley A. P. de; Menezes,Maria Ângela B. C.; Jacomino,Vanusa M. F.; Sperling,Eduardo Von.	
Data: 	2013-02-01	
Ano: 	2013	
Palavras-chave: 	Neutron activation analysis; Multielemental analyses; Phosphogypsum; Rare earth elements.	
Resumo: 	The concern related to environment is growing. Due to this, it is needed to determine chemical elements in a large range of concentration. The neutron activation technique (NAA) determines the elemental composition by the measurement of artificial radioactivity in a sample that was submitted to a neutron flux. NAA is a sensitive and accurate technique with low detection limits. An example of application of NAA was the measurement of concentrations of rare earth elements (REE) in waste samples of phosphogypsum (PG) and cerrado soil samples (clayey and sandy soils). Additionally, a soil reference material of the International Atomic Energy Agency (IAEA) was also analyzed. The REE concentration in PG samples was two times higher than those found in national fertilizers, (total of 4,000 mg kg-1 ), 154 times greater than the values found in the sandy soil (26 mg kg-1 ) and 14 times greater than the in clayey soil (280 mg kg-1 ). The experimental results for the reference material were inside the uncertainty of the certified values pointing out the accuracy of the method (95%). The determination of La, Ce, Pr, Nd, Pm, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb and Lu in the samples and reference material confirmed the versatility of the technique on REE determination in soil and phosphogypsum samples that are matrices for agricultural interest.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000100006	
Editor: 	Associação Brasileira de Engenharia Agrícola	
Relação: 	10.1590/S0100-69162013000100006	
Formato: 	text/html	
Fonte: 	Engenharia Agrícola  v.33 n.1 2013	
Fonte: 	info:eu-repo/semantics/openAccess