Source apportionment of urban aerosols using receptor modelling approach: an application to Ankara

Yatın, Mustafa


Source apportionment of trace elements in Ankara
Çelik, İlke; Sanin, Faika Dilek; Department of Environmental Engineering (2014)
In this study, chemical composition of aerosol samples in Ankara is identified through receptor modeling. Within the scope of the study, 24-hr aerosol samples are collected by ‘Stack Filter Unit’ with using Nuclepore filter for 9 months at Middle East Technical University campus as a suburban sampling location. Collected filters are analyzed for fifty-seven major and minor trace elements, between z=3 Li and z = 92 (U) and black carbon. Measured concentrations of fine and coarse fractions are compared with c...
Investigation of Turkey's carbon dioxide problem by numerical modeling
Can, Ali; Tokdemir, Turgut; Department of Engineering Sciences (2006)
CO2 emission is very important, because it is responsible for about 60% of the "Greenhouse Effect". The major objectives of this study were to prepare a CO2 emission inventory of Turkey based on districts and provinces by using the fuel consumption data with respect to its sources, to find the CO2 uptake rate of forests in Turkey based on provinces and districts, and to estimate the ground level concentration of CO2 across Turkey using U.S. EPA's ISCLT3 model for the preparation of ground level concentratio...
Source apportionment of volatile organic compounds in Ankara atmosphere
Uzunpınar, Elif Sena; İmamoğlu, İpek; Tuncel, Süleyman Gürdal; Department of Environmental Engineering (2015)
In this study, ambient concentrations of volatile organic compounds (VOCs) of Photochemical Assessment Monitoring Stations (PAMS) in Ankara atmosphere were measured to determine the current level and sources of these compounds. Sampling was performed at METU Department of Environmental Engineering from January, 2014 to December, 2014 with stainless-steel canisters. Mean VOC concentrations ranged between 0.04 μg m-3 (cis-2-pentene) and 10.30 μg m-3 (toluene) with average benzene concentration of 1.49 μg m-3....
The effects of promoters on the sulfur resistance of nox storage/reduction catalysts : a density functional theory investigation
Koşak, Rukan; Toffoli, Daniele; Toffoli, Hande; Department of Chemistry (2011)
High fossil fuel consumption in transportation and industry results in an increase of the emission of green-house gases. To preserve clean air, new strategies are required. The main intention is to decrease the amount of CO2 emission by using lean-burn engines while increasing the combustion efficiency and decreasing the fuel consumption. However, the lean-burn engines have high air-to-fuel ratio which complicates the reduction of the oxides of nitrogen, NOx . The emission of these highly noxious pollutants...
Structural electrical and optical characterization of N- and Si-implanted GaSe single crystal grown by bridgman method
Karabulut, Orhan; Akınoğlu, Bülent Gültekin; Parlak, Mehmet; Department of Physics (2003)
Single crystals of GaSe were grown from the melt using 3-zone vertical Bridgman-Stockbarger system. In order to determine the doping effect, nitrogen and silicon ions were implanted to the grown crystals. Surface morphology and stoichiometry were examined using scanning electron microscope equipped with EDAX and structure properties were examined by x-ray diffraction technique. It was observed that the resulting ingot was stoichiometric and the structure was hexagonal. To identify the effects of ion implant...
Citation Formats
M. Yatın, “Source apportionment of urban aerosols using receptor modelling approach: an application to Ankara,” Ph.D. - Doctoral Program, Middle East Technical University, 1994.