DBPapers
DOI: 10.5593/SGEM2014/B42/S19.037

ANALYSIS OF NOX AIR QUALITY INDICATORS IN URBAN AREAS OF CLUJ COUNTY, ROMANIA

A. E. Croitoru, R. H. Batinas, L. Muresan
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-16-2 / ISSN 1314-2704, June 19-25, 2014, Book 4 ,Vol. 2, 281-288 pp

ABSTRACT
The urban air quality is one of the most important issues has attracted the attention of
many researchers worldwide because it’s strong impact on human health. The present
study is focusing on some important air quality indicators, in Cluj County, Romania:
nitrogen oxides (NO, NO2, NOx). The data have been collected in five measurement
points located in two different cities in Cluj County: four points in Cluj- Napoca and
one in Dej. Cluj-Napoca is one of the most important city of Romania, with more than
320,000 inhabitants, while Dej was one of the most industrialized city of Cluj County,
which has about 33,000 inhabitants. The recordings were extended over a period of 5
years (2009 – 2013), with daily data coverage. The data were obtained by using the
chemiluminescence technique for all five points. The main results are: the highest
concentrations have been recorded during the cold half of the year (October - March)
when exceeding of the maximum allowed values may occur, associated to specific
weather condition (low thermal inversions) and heating systems; the most polluted spots were identified in Cluj-Napoca city, in the industrial and high traffic areas.

Keywords: NOx, air quality, Cluj, Romania