Emissão de mercúrio para a atmosfera pela queima de gás natural no Brasil

Química Nova

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   
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