Data/hora: 20/06/2024 15:27:32

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	23/02/2015	
Data da última atualização: 	14/04/2016	
Autoria: 	BUENO, S. C. E.; BAPTISTA FILHO, M.; ALMEIDA JUNIOR, P. S. G. de; POLIDORO, J. C.; OLIVARES, F. L.; STHEL, M. S.; VARGAS, H.; MOTA, L.; SILVA, M. G. da.	
Afiliação: 	SÂMYLLA CRISTINA ESPÉCIE BUENO, UENF; MILTON BAPTISTA FILHO, INSTITUTO FEDERAL FLUMINENSE; PAULO SÉRGIO GOMES DE ALMEIDA JUNIOR, UENF; JOSE CARLOS POLIDORO, CNPS; FÁBIO LOPES OLIVARES, UENF; MARCELO SILVA STHEL, UENF; HELION VARGAS, UENF; LEONARDO MOTA, UENF; MARCELO GOMES DA SILVA, UENF.	
Título: 	Cuban zeolite as ammonium carrier in urea-based fertilizer pellets: photoacoustic-based sensor for monitoring N-ammonia losses byvolatilization in aqueous solutions.	
Ano de publicação: 	2015	
Fonte/Imprenta: 	Sensors and Actuators B: Chemical, v. 212, p. 35-40, Jun. 2015.	
DOI: 	10.1016/j.snb.2015.01.114	
Idioma: 	Inglês	
Conteúdo: 	The loss of mineral nitrogen by ammonia volatilization is one of the main drawbacks in modern agriculture. This work proposes the use of a quantum cascade laser-based photoacoustic sensor to continuously monitor ammonia emission rates from fertilizer pellets in aqueous solutions. Pellets were obtained mixing different contents (2.5, 20 and 40 wt.%) of Cuban zeolite with urea. The pH of aqueous solutions was also monitored and its maximum value was 9.5 for pellets with 40 wt.% of zeolite. Urease obtained from soybean seed extract was added to the solution. Ammonia emission rates were enhanced due to the catalytic action of urease on the urea hydrolysis. The use of Cuban zeolite (40 wt.%) reduced the ammonia volatilization from the solutions by approximately 33%. The results give us important clues to reach a better understanding of the kinetics of ammonia release from pellets and the use of zeolite in agriculture as an innovative material to control the retention of mineral nitrogen into soils.	
Palavras-Chave: 	Volatilização de amônia; Zeólita.	
Thesaurus Nal: 	Zeolites.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (18849-1) - UPC - AP - DD -  -  - 2015.00078 - DIS