Química Nova | |
Emissão de mercúrio para a atmosfera pela queima de gás natural no Brasil | |
Luiz Drude De Lacerda2  Angelo Francisco Dos Santos1  Rozane Valente Marins1  | |
[1] ,Universidade Federal Fluminense Departamento de Geoquímica Niterói RJ | |
关键词: mercury; natural gas; atmospheric emissions; | |
DOI : 10.1590/S0100-40422007000200024 | |
来源: SciELO | |
【 摘 要 】
Increasing natural gas use in Brazil triggered a discussion of its role as a Hg source. We show that Hg emissions to the atmosphere from fossil fuel combustion for power generation in Brazil contribute with 6.2% (4.2 t yr-1) to the total anthropogenic Hg atmospheric emissions, with coal combustion and biomass burning as major sources. Natural gas contributes with 0.04 t yr-1, mostly from electricity generation (88%) and industrial uses (7.6%). Preliminary results on Hg concentrations in natural gas suggest that a large fraction of it is trapped during refining and transport, which may create Hg point sources between extraction and consumption.
【 授权许可】
CC BY-NC
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
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