TY - JOUR N2 - The research determined the concentrations of selected polycyclic aromatic hydrocarbons (PAHs) in water and sediments of Kłodnica River reservoirs and distribution depending on number of rings, ecotoxicological impact on studied ecosystems and possible sources of origin. Samples were subjected to qualitative and quantitative analysis by gas chromatography coupled with a GC-MS mass detector, using a ZB-5MS column and electron ionization. The sum of 16 PAHs in water ranged 0.111–0.301 μg/L (mean 0.200 μg/L) in Dzierżno Duże, 0.0410–0.784 μg/L (mean 0.303 μg/L) in Dzierżno Małe and 0.0920–1.52 μg/L (mean 0.596 μg/L) in Pławniowice. While in sediments respectively: 17.5–37.2 μg/g (mean 26.8 μg/g), 4.33–8.81 μg/g (6.43 μg/g) and 2.27–9.50 μg/g (5.30 μg/g). The concentration of PAHs in sediments of reservoirs, which spatial management of the catchment area accounts for over 90% of agricultural and forest land, was up to eight times lower than in sediments of the reservoir which is 69%, while built-up and transport areas are 24%. In sediments of Dzierżno Małe and Pławniowice PAHs with 5 and 6 rings dominate, while in Dzierżno Duże – 2 and 3 rings. Higher concentrations of PAHs with higher molecular weight, found in the bottom water layers, confirm the role of the sedimentation process in the transport of these compounds in reservoirs. Assessment of sediment quality, based on ecotoxicological criteria, showed that PAHs may cause toxic effects in Dzierżno Duże, while in Dzierżno Małe and Pławniowice can cause sporadic adverse effects. The likely source of PAHs in reservoirs is low emissions. L1 - http://czasopisma.pan.pl/Content/118699/PDF/Archives%20vol%2046%20no%204pp104-120.pdf L2 - http://czasopisma.pan.pl/Content/118699 PY - 2020 IS - No 4 EP - 120 DO - 10.24425/aep.2020.135769 KW - polycyclic aromatic hydrocarbons (PAHs) KW - bottom sediments KW - ecological risk KW - atchment area KW - diagnostic ratios KW - anthropopressure A1 - Pohl, Alina A1 - Kostecki, Maciej PB - Polish Academy of Sciences VL - vol. 46 DA - 2020.12.15 T1 - Spatial distribution, ecological risk and sources of polycyclic aromatic hydrocarbons (PAHs) in water and bottom sediments of the anthropogenic lymnic ecosystems under conditions of diversified anthropopressure SP - 104 UR - http://czasopisma.pan.pl/dlibra/publication/edition/118699 T2 - Archives of Environmental Protection ER -