Data/hora: 01/06/2024 07:27:40

Provedor de dados: 	90	
País: 	Brazil	
Título: 	Radionuclides and heavy metal contents in phosphogypsum samples in comparison to cerrado soils	
Autores: 	Jacomino,Vanusa Maria Feliciano; Oliveira,Kerley Alberto Pereira de; Taddei,Maria Helena Tirollo; Siqueira,Maria Célia; Carneiro,Maria Eleonora Deschamps Pires; Nascimento,Marcos Roberto Lopes; Silva,David Faria da; Mello,Jaime Wilson Vargas de.	
Data: 	2009-10-01	
Ano: 	2009	
Palavras-chave: 	Phosphogysum; Soil fertility; Radionuclides; Metals; Contamination.	
Resumo: 	Phosphogysum (PG) or agricultural gypsum, a solid waste from the phosphate fertilizer industry, is used as soil amendment, especially on soils in the Cerrado region, in Brazil. This material may however contain natural radionuclides and metals which can be transferred to soils, plants and water sources. This paper presents and discusses the results of physical and chemical analyses that characterized samples of PG and compares them to the results found in two typical soils of the Cerrado, a clayey and sandy one. These analyses included: solid waste classification, evaluation of organic matter content and of P, K, Ca, Mg, and Al concentrations and of the mineralogical composition. Natural radionuclides and metal concentrations in PG and soil samples were also measured. Phosphogypsum was classified as Class II A - Not Dangerous, Not Inert, Not Corrosive and Not Reactive. The organic matter content in the soil samples was low and potential acidity high. In the mean, the specific 226Ra activity in the phosphogypsum samples (252 Bq kg-1) was below the maximum level recommended by USEPA, which is 370 Bq kg-1 for agricultural use. In addition, this study verified that natural radionuclides and metals concentrations in PG were lower than in the clayey Oxisol of Sete Lagoas, Minas Gerais, Brazil. These results indicated that the application of phosphogypsum as soil amendment in agriculture would not cause a significant impact on the environment.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000500038	
Editor: 	Sociedade Brasileira de Ciência do Solo	
Relação: 	10.1590/S0100-06832009000500038	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Ciência do Solo  v.33 n.5 2009	
Fonte: 	info:eu-repo/semantics/openAccess