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Authors: G. CRISTEA, IOVANCA HAIDUC, S.M. BELDEAN GALEA, S. CUNA.
The Variation of CH4 in the Urban Areas from Cluj County. The emission of methane in big urban areas is considered one of the sources that determine the creation of the methane nu inteleg in ce sens daca te referi la cantitate amount in the atmosphere e mai bun. In this study, we have investigated the variation of CH4 level, in three urban areas from Cluj county: Cluj-Napoca, Turda and Huedin, for six months, since July-December, 2008. In each of these locations, we chose city points with intense anthropic activities, and some reference points with a minor anthropic impact. For the CH4 determination, the air samples were collected in a special glass vials and analyzed by gas chromatography equipped with a packed column and FID detector. The results showed that the CH4 concentration levels depend on the date and the place of determination. The concentrations of CH4 in urban area are lower then in the reference points.
Keywords: methane emissions, urban agglomeration, gas chromatography
