Analysis of Nitrogen Oxides Levels Measured in Turceni Area
2014
recorded during 2013 were below 200 μg/m 3 - value representing the hourly limit value for human health protection. High levels of NO 2 in the area investigated were registered on July and October. The highest NO hourly concentration (190.61 μg/m 3 ) was recorded on October, and the lowest NO hourly concentration (3.56 μg/m 3 ) was recorded in spring and summer months. NO x highest hourly concentration (396.04 μg/ m 3 ) was registered on October. Regarding a possible correlation between the concentrations of NOx and wind direction, it can not be made because the automatic station for monitoring air quality in the area is located to the northwest of Turceni Thermal Power Station, and wind direction from the station (SE to NW) in the months analyzed represented only 4.2 % of the time. Results regarding daily cycles of NO, NO 2 and NOx in the urban atmosphere have shown that their concentrations are strongly affected by traffic emissions, and photochemistry activity.
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