Artículos de revistas
Atmospheric emission of reactive nitrogen during biofuel ethanol production
Fecha
2008-01-15Registro en:
Environmental Science & Technology. Washington: Amer Chemical Soc, v. 42, n. 2, p. 381-385, 2008.
0013-936X
10.1021/es070384u
WOS:000252317700013
9165109840414837
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
This paper evaluates emissions to the atmosphere of biologically available nitrogen compounds in a region characterized by intensive sugar cane biofuel ethanol production. Large emissions of NH(3) and NO,, as well as particulate nitrate and ammonium, occur at the harvest when the crop is burned, with the amount of nitrogen released equivalent to similar to 35% of annual fertilizer-N application. Nitrogen oxides concentrations show a positive association with fire frequency, indicating that biomass burning is a major emission source, with mean concentrations of NO, doubling in the dry season relative to the wet season. During the dry season biomass burning is a source of NH3, with other sources (wastes, soil, biogenic) predominant during the wet season. Estimated NO(2)-N, NH(3)-N, NO(3)(-)-N and NH(4)(+)-N emission fluxes from sugar cane burning in a planted area,of ca. 2.2 x 10(6) ha are 11.0, 1.1, 0.2, and 1.2 Gg N yr(-1), respectively.