Data/hora: 04/06/2024 06:54:09

Provedor de dados: 	52	
País: 	Brazil	
Título: 	Investigation the natural radioactivity in local and imported chemical fertilizers	
Autores: 	Hussain,Raad Obid; Hussain,Hayder Hamza.	
Data: 	2011-08-01	
Ano: 	2011	
Palavras-chave: 	Natural radioactivity; Gamma-spectrometry; Fertilizers.	
Resumo: 	In order to assess the radioactive level in the environment, the specific activities of 238U, 232Th and 40K were measured by using a gamma ray spectrometer based on a NaI(Tl) detector. The results showed that the specific activities of 238U, 232Th and 40K were 12.846-88.585, 1.304-26.656 and 11.598-2275.896 Bq/kg respectively. The radium equivalent activity was also calculated which varied from 0.893 to 175.244 Bq/kg. The radium equivalent average values were lower than the world average. In general, the highest level of radium equivalent value was in leafy type NPK fertilizers. The urea type had no radionuclide. The specific activity and absorbed dose rate at 1m above the ground surface (nGy/h) after NPK fertilizers agricultural applications were calculated and the maximum value of dose rate was 0.15% of the world average outdoor exposure due to terrestrial gamma radiation.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400018	
Editor: 	Instituto de Tecnologia do Paraná - Tecpar	
Relação: 	10.1590/S1516-89132011000400018	
Formato: 	text/html	
Fonte: 	Brazilian Archives of Biology and Technology  v.54 n.4 2011	
Fonte: 	info:eu-repo/semantics/openAccess