İzmir bölgesinde bromlu difenil eterlerin (PBDEler) çevresel ortamlarda dağılımı ve dolanımı

Seven PBDE congeners including BDE-28, -47, -99, -100, -153, -154 and -209 were investigated in ambient air, soil, organic films and water samples in Izmir. Ambient air studies were carried out at four sampling sites a suburban, an industrial and two urban sites and their spatial and seasonal variations were investigated. BDE- 209 was the most abundant congener at all sites, and all samples were dominated by penta and deca mixtures. Gas-particle partitioning of PBDEs were examined using Junge-Pankow and KOA-based models. Dry deposition samples were collected in Suburban and Urban sampling sites concurrently with ambient air samples. Particle dry deposition velocities were calculated using particle concentrations and fluxes. Soil samples were collected at 13 different sites. A bag filter dust from electric arc furnace of steel production was also examined. Generally, industrialized and urbanized regions have higher soil concentrations while Suburban soils have relatively low PBDE concentrations. PBDEs in organic film samples were also collected from different sites with different characteristics. Indoor windshield film samples from 4 different types of vehicles were also collected for winter and summer periods. Concurrent ambient air and water concentrations were measured at a coastal site of Izmir bay. The gas and dissolved-phase concentrations for individual BDEs were significantly correlated indicating that even in a coastal environment the atmosphere controls the surface water PBDE levels. This suggests that sediment may not contribute significantly to surface water concentrations. The net air-water exchange BDE fluxes were also examined using Henry?s law constants of PBDEs measured in present study. The BDE-28 fluxes were found to be mainly volatilization while other congeners generally deposited to water during the sampling periods.