Title:	Nutrient release by a Brazilian sedimentary zeolite.
Authors:	MONTE, M. B. M. MIDDEA, A. PAIVA, P. R. P. BERNARDI, A. C. de C. REZENDE, N. G. A. M. BAPTISTA-FILHO, M SILVA, M. G. VARGAS, H. AMORIM, H. S. SOUZA BARROS, F. de
Affiliation:	MARISA B. M. MONTE, CETEM/RIO DE JANEIRO; ANTONIETA MIDDEA, CETEM/RIO DE JANEIRO; PAULO R. P. PAIVA, CETEM/RIO DE JANEIRO; ALBERTO CARLOS DE CAMPOS BERNARDI, CPPSE; NÉLIO G. A. M. REZENDE, Companhia de Pesquisas e Recursos Minerais; MILTON BAPTISTA FILHO, UENF/RIO DE JANEIRO; MARECELO G. SILVA, UENF/RIO DE JANEIRO; HELION VARGAS, UENF/CAMPOS DOS GOYTACAZES; HELIO S. AMORIM, UFRJ/RIO DE JANEIRO; FERNANDO DE SOUZA BARROS, UFRJ/RIO DE JANEIRO.
Date Issued:	2009
Citation:	Anais da Academia Brasileira de Ciências, v. 81, n. 4, p. 641-653, dec. 2009.
Description:	This report describes the characterization of a sedimentary occurrence from the Parnaíba Basin, Brazil, containing the zeolite stilbite intertwined with smectitic clay mineral. The head samples from different sites present a wide content range of the zeolitic phase - 15% to 50%. The use of simple separation techniques - conventional gravitic treatments - yields concentrates containing about 67% of the zeolitic component. Assays with the amendments of these concentrates with plant nutrients yield release rates matching those reported for similar commercial products.
Keywords:	Sedimentary zeolite Parnaíba Basin Plant nutrients Nutrient attachment Release
DOI:	https://doi.org/10.1590/S0001-37652009000400003
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPPSE)