The soil is a natural reservoir and a transporter component of the terrestrial ecosystem for polychlorinated biphenyls (PCBs). The determination of PCBs is important to identify the necessary precautious steps to be taken. The objective of this study is to determine seasonal and regional PCB variations in the soil in Bursa-Turkey. In this context, soil samples were collected from 19 different points during summer and winter seasons and analyzed by gas chromatography-electron capture detector (GC-ECD) for Σ82 PCB. The regional variation of Σ82 PCB concentrations was 0.03-85 ng/g dry matter (DM). The highest Σ82 PCB concentration was measured sampling points near the iron-steel plant in both seasons. At all sampling points, Σ82 PCB concentrations were higher in winter than those in summer. In general, high-chlorinated homolog groups (>6-CBs) in summer and low-chlorinated homolog groups (5-CBs) and TOC, while no significant correlation was observed between the light species (
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