Abstract:
Abstract: Harmful substances in the ambient air can be reduced only
on condition that their emitters are kept under control. For that purpose it is necessarily to
know key points in technological processes that are emitting specific pollutants, the nature of
emitters, the link between the emission fluxes on the emitters, meteorological base of the region
and the concentration of pollutants at the receptors of ambient air. Atmospheric surface
temperature inversions play a significant role in the problem of ambient air pollution since
their upper edge acts as a natural barrier to the vertical dispersion of pollutants. In many
cases of pollution, there are no prior knowledge of the emission sources, hence Chemical Mass
Balance models (CMB) are applied to extract information concerning the sources using minute by
minute continuous measurements data of ambient air pollution at the receptors. The results of
calculated fingerprints of possibly sources are connecting to real emission sources. Model of
investigation was highly industrial city in Serbia (Pančevo), with over 80.000 habitants, where
among the rest industries are located oil refinery, petrochemistry and fertilizer factory. The
investigated region is characterized by maximum number of surface temperature inversions of
atmosphere during the night times and their furlough during the day times in August. Analysis
of daily variations contents of pollutants in ambient air show that concentrations of the
pollutants from the low altitude emission sources were higher two times and more during the
night than daytimes vice verse for pollutants from the high altitude sources. The daily variations
of their concentrations show the minimums in the afternoons when is boundary layer at the top point.
NH3 in this case origin from high altitude source in fertilizer factory, which is only one in the
region, therefore was chosen as a tracer of industrial area influence. CMB models showed the highest
associations of pollutants that are constituents of volatile organic compounds from low altitude
sources in industrial area. The measures of control of identified emission sources, such as
extinguishing key sources, planning of emiters’ activities in harmony with meteorological
conditions, and at a low rate and simple reconstruction one part of sources in both the
refinery and petrochemistry had as the result the reduction of VOCs concentrations in the
receptor’s part of ambient air for more than twice. The benzene concentrations at the receptors
which are under high influence of industrial sources reached in the years 2004 and 2005 the values
acceptable with regard to the limit value of the Directive 2000/69/EC.
Brief Biography of the Speaker:
Graduation: 1990, Faculty of Physical Chemistry, University of
Belgrade
M.Sc. Thesis: 1996, Faculty of Physical Chemistry, University
of Belgrade
Ph.D. Thesis: 2004, Faculty of Chemistry, University of
Belgrade
Professional background: Between 1990 and 1991 part-time worked
in Institute of General and Physical Chemistry in Belgrade as a
Research Assistant. From 1992 to 1999 worked in Institute of Workers
Safety, Fire and Environmental Protection, Belgrade as a research
associate. Since 1999 has been working in Centre of Chemistry of
Institute for chemistry, technology and metallurgy. Present position
is scientific research and head of the Environment department of the
Laboratory of IHTM-Centre of chemistry. She is familiar with GC, FAS
and GF-AAS laboratory techniques. The scientific research evolves
investigation in environment; air pollution and their physicochemical
transformations, emission sources and atmospheric transport as well as
interactions between aquatic systems and soils. The whole scientific
research of Dr. Dragana Đorđević published in 20 scientific articles,
7 contributions to books and over 60 published contributions to
academic conferences.
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