Atmospheric Organochlorinated Pesticide Levels and Gas/Particle Partitioning in Istanbul during Winter Weather Conditions

Abstract

In this study, gas and particle phase ambient organochlorine pesticide (OCP) levels were investigated atan urban site in Istanbul. Samples were collected by a high-volume sampler for fourteen days in winter. Individual OCP concentrations were between13 and 593 pg.m-3 for particle phase and 14 and 1,748 pg.m-3 for gaseous phase. The sums of the average concentration of each OCP in gaseous and particle phases were 3,219 and 2,746 pg.m-3, respectively. δ-HCH had the highest individual concentration. The abundance of DDTs followed the order 4.4'-DDT > 4.4'-DDD > 4.4'-DDE.The Σ(gas+particle)OCP concentrations ranged between 1,845 and 10,196 pg.m-3. On the days when high concentrations were observed, the trajectories of air masses were investigated by the HYSPLIT model. logKp versus logPL0 model was applied in order to determine the fate of gas/particle partitioning. The average slope of the regression line was -0.35, whereas the intercept was -2.89.

Keywords

• ocp
• winter
• gas/particle partitioning
• ocp
• kış
• gas/partikül dağılımı