title: Levels and distribution of dissolved hydrophobic organic contaminants in the Morava river in Zlín district, Czech Republic as derived from their accumulation in silicone rubber passive samplers.
abstract: Dissolved waterborne polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) were assessed over a period of one year at five sampling sites in a model industrial region in the Czech Republic using silicone rubber passive samplers. The spatial variability of POPs in the studied region in water was small and diffusive pollution sources predominate. Concentrations of the most volatile PAHs decreased with increasing water temperature in the whole region, which reflects the seasonality in atmospheric deposition. The dissolved concentrations of more hydrophobic PAHs, PCBs and OCPs in and downstream the industrial zone are related to desorption from suspended particles. Upstream the industrial area, a positive correlation of dissolved and particle-bound contamination was observed only for DDT metabolites and hexachlorobenzene. Calculated fugacities in water and bottom sediment indicated a fair degree of equilibrium between these compartments for OCPs and PCBs, whereas sediment represented a potential source of PAHs.
authors.affiliation: Masaryk University, Faculty of Science, Research Centre for Toxic Compounds in the Environment RECETOX, Kamenice 126/3, 625 00 Brno, Czech Republic.
authors.forename: Roman
authors.initials: R
authors.lastname: Prokeš
authors.forename: Branislav
authors.initials: B
authors.lastname: Vrana
authors.forename: Jana
authors.initials: J
authors.lastname: Klánová
mesh_terms: D018153:Czech Republic; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D057927:Hydrophobic and Hydrophilic Interactions; D010575:Pesticides / Q000032:analysis*; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D045483:Rivers / Q000737:chemistry; D012826:Silicone Elastomers / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D011084:Polycyclic Aromatic Hydrocarbons; D012826:Silicone Elastomers; D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls