PCB and Heavy Metal Contamination in Bottom Sediments from Three Reservoirs of Different Catchment Characteristics
M. Urbaniak1,2, M. Zieliński3, W. Wesołowski3, M. Zalewski1,2
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1Department of Applied Ecology, University of Łódź, Banacha 12/16, 90-237 Łódź, Poland
2International Institute of the Polish Academy of Sciences, European Regional Centre for Ecohydrology under the auspices of UNESCO, Tylna 3, 90-364 Łódź, Poland
3Nofer Institute of Occupational Medicine, Teresy 8, 91-348 Łódź, Poland
Pol. J. Environ. Stud. 2008;17(6):941-949
This study shows a comparative analysis of occurrence and concentration of PCBs and heavy metals in bottom sediment samples collected from three different types of reservoirs: a small and highly urbanized catchment (Sokolowka Reservoir; SR), a large and diversified (agricultural/urban) catchment (Jeziorsko Reservoir; JR) and a small catchment of agricultural impact (Barycz Reservoir; BR). Total PCB concentration ranged from 121.37 (JR) to 694.31 ng/kg d.w. (SR). Individual congeners were detected with values from 0.07 (PCB-169) to 327.34 ng/kg d.w. (PCB-118). The maximum total WHO-TEQ concentration was observed in reservoirs situated in the highly urbanized catchment (SR; 1.42 ng TEQ/kg d.w.), whereas the minimum concentration was noted in the diversified catchment reservoir (JR; 0.28 ng TEQ/kg d.w). The WHO-TEQ concentration of samples collected from a reservoir of the small and agriculture catchment was in the value of 0.40 ng TEQ/kg d.w. The highest concentration of heavy metals was observed in SR sample and ranged form 0.41 for Cd to 607.16 mg/kg d.w. for Mn. The JR sample showed several times lower concentrations ranging between 0.04 for Se to 237.26 mg/kg d.w. for Mn, but the lowest values were noted for the BR sample (0.12 for Cd to 192.84 mg/kg d.w. for Mn). Generally, the concentrations of PCBs and heavy metals were highest in the sample from the urban area (represented by Sokolowka Reservoir) and indicated the effect of urban catchment use on the pollutant distribution patterns.
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