Determination of organic particle composition in Ankara atmosphere and investigation of their contribution to receptor modeling

Koçak, Ebru
There are two main objectives of this work. First one is to reveal general characteristics of organic particulate composition in Ankara atmosphere, including their temporal and spatial variability, dependence of composition to meteorology and sources. The second one is to generate new source markers to improve the resolution receptor oriented source apportionment studies. In this study, 45 particulate organic matters were measured at two different stations in Ankara. First one was located at parking site of Department of Environmental Engineering, METU. This site was classified as sub-urban station. The second one was located at Faculty of Agriculture, Ankara University. This site was classified as urban station. Sampling campaign was started at July 2014 and finished at September 2015. 336 daily PM2.5 samples were collected from urban station and 275 daily PM2.5 samples were collected from sub-urban station by using high volume samplers with an average flow rate of 1.08 m3 min-1. Analyzed compounds were categorized into five main groups: PAHs, n-alkanes, n-alkanoic acids, levoglucosan and EC-OC. Their temporal and seasonal variations were examined. In this study, EPA PMF 5.0 was applied to determine sources of particulate organic matter and contribution of sources to each compound. The optimized model results revealed presence of eight sources for urban and sub-urban stations. Two combustion factor, a natural gas combustion factor, a road dust factor, two food cooking factors, a biomass burning factor and a plant emissions factor were identified for urban station. Two combustion factors, a biomass burning factor, a vehicular emission factor, a natural gas combustion factor, a plant emission factor, a food cooking factor and a secondary organic aerosol factor were identified for sub-urban station.


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Özkar, Saim (2002-10-01)
The two main goals of the current work are: (i) to test the effects of Proton Sponge as a H+ scavenger and (ii) to test and rank the relative efficacy of the anions (Y-) listed below for their relative ability to allow the formation, stabilization (including isolability), high catalytic activity, and long catalytic lifetime in the following, more generalizable transition metal nanocluster formation reaction: 1.0[Bu4N](q)Y + 1.0[(1,5-COD)Ir(I)(CH3CN)(2)]BF4 + 2.5H(2) --> 1.0cyclooctane + 1/n{[Bu4N](nq)[Ir(0)...
Transition to Democracy in Post-Soviet Kyrgyzstan:Leaders, Citizens and Perceptions of Political Legitimacy
Murzaeva, Dinara; Akçalı, Pınar; Department of Political Science and Public Administration (2011)
The primary objective of this work is to develop the (rationalist) thesis of integrity or the integral view in the realm of legal-political thought. This view consists in the elaboration of the essential-conceptual interdependency of law, the political authority (i.e. the state) and the universal moral standpoint of justice (i.e. the standpoint encapsulated by the idea of human rights in our age) in a way avoiding the shortfalls of legal-moralism illustrated by the natural-law-theories. The rationalist thes...
Relationships Between Epidemiological Features and Tumor Characteristics of Breast Cancer
Dogan, Lutfi; Kalaylioglu, Zeynep; Karaman, Niyazi; Ozaslan, Cihangir; Atalay, Can; Altinok, Mehmet (2011-01-01)
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Capacity Building in Earthquake Research for Risk Reduction in Urban Environments (CYBER)
Sucuoğlu, Haluk(2008-4-30)
There are three major objectives of this proposal. The first objective is to increase the level of collaboration of METU with institutions in Europe through networking for facility development, technology transfer, bilateral study visits and joint studie s, for a better participation in EC FP. The second objective is to increase the technical capabilities of the centre. Although METU owns modest experimental and computational facilities, a pseudo-dynamic testing facility (PsD) and a GIS facility are not cur...
Biomechanical Evaluation of a Novel Apatite-Wollastonite Ceramic Cage Design for Lumbar Interbody Fusion: A Finite Element Model Study
BOZKURT, CELAL; ŞENKÖYLÜ, ALPASLAN; Aktas, Erdem; SARIKAYA, BARAN; SİPAHİOĞLU, SERKAN; Gürbüz, Rıza; Timucin, Muharrem (2018-01-01)
Objectives. Cage design and material properties play a crucial role in the long-term results, since interbody fusions using intervertebral cages have become one of the basic procedures in spinal surgery. Our aim is to design a novel Apatite-Wollastonite interbody fusion cage and evaluate its biomechanical behavior in silico in a segmental spinal model. Materials and Methods. Mechanical properties for the Apatite-Wollastonite bioceramic cages were obtained by fitting finite element results to the experimenta...
Citation Formats
E. Koçak, “Determination of organic particle composition in Ankara atmosphere and investigation of their contribution to receptor modeling,” Ph.D. - Doctoral Program, Middle East Technical University, 2017.