Air-soil exchange of PCBs: seasonal variations in levels and fluxes with influence of equilibrium conditions.
The variations in the occurrences of PCB congeners both in soil and air were investigated in conjunction with each other, and the changes in the fugacity fractions and flux levels were examined on a seasonal basis. Air and soil samples were collected concurrently two or three times in a month during a one-year monitoring at two different locations in Bursa, located in the northwestern Turkey. Fugacity fractions and net flux levels of PCB congeners were calculated. Air and soil PCB levels increased together as the soil temperature increased, suggesting the influence of instantaneous air-soil exchange towards the equilibrium conditions. The flux levels and fugacity fractions also showed a positive significant correlation with soil temperature. Flux levels were positive for the dates with fugacity fractions above 0.5, indicating volatilization from soil to air.
Department of Environmental Engineering, Faculty of Engineering & Architecture, Uludag University, 16059 Bursa, Turkey. tasdemir@uludag.edu.tr
Yücel
Y
Tasdemir
Güray
G
Salihoglu
Nezih Kamil
NK
Salihoglu
Askın
A
Birgül
D000393:Air Pollutants / Q000737:chemistry*; D004784:Environmental Monitoring; D007700:Kinetics; D011078:Polychlorinated Biphenyls / Q000737:chemistry*; D012621:Seasons; D012989:Soil Pollutants / Q000737:chemistry*; D013696:Temperature; D014421:Turkey; D014835:Volatilization
D000393:Air Pollutants; D012989:Soil Pollutants; D011078:Polychlorinated Biphenyls