İzmir?de seçilen endüstriyel faayiletlerden kaynaklanan kokuların niteliği ve kimyası

The relationship between odor concentrations (olfactometry) and chemical concentrations (gas chromatography-mass spectrometry) is studied for the odorous air compositions of a landfill, a wastewater treatment plant (WWTP), a rendering plant, and Aliağa town which has large petroleum and petrochemical industries in Izmir. Samples taken from the university campus located in a non-industrial and nonurban area are also studied for comparison. Ambient air samples were taken into special bags for sampling of odors. In the laboratory odorous chemicals in the samples were transferred into adsorbent tubes and analyzed using a combination of thermal desorption and GC-MS. Several volatile organic compounds (VOCs) are identified and quantified at these facilities in three sampling campaigns. The compounds measured in the odorous gas composition are the aldehydes, ketones, esters, halogenated compounds, volatile fatty acids, aromatic compounds, esters as well as reduced sulfur compounds. Statistical evaluations showed that a relationship exist between odor and chemical group concentrations at the studied facilities except rendering plant. The relationships of odor concentrations with the different groups of chemicals revealed that the concentrations of aldehydes and monoaromatics are the best estimators in odor concentrations. Based on the odor contribution ratios of the studied compounds the results of the study revealed that propanal, toluene, and hydrogen sulfide were dominating in the odor emissions of the studied industrial facilities. Keywords: odor concentration, olfactometry, VOC, GC-MS, landfill, wastewater treatment plant, rendering plant, odor contribution ratio