title: Sedimentary record of PAHs in the Barigui River and its relation to the socioeconomic development of Curitiba, Brazil.
abstract: Concentrations of polycyclic aromatic hydrocarbons (PAHs) were determined in a sediment core collected from the Barigui River, in Curitiba, South Brazil. The USEPA's 16 priority PAH concentrations ranged from 39ng g(-1) to 2350ng g(-1) of dry sediment over a period that corresponds temporally to between ca. 1855 and 2011. The concentrations and patterns of PAH distribution changed over this time period and may be associated with several episodes in the Curitiba's history. Two major PAHs concentration peaks occurred in approximately 1910 and 1970, which might reflect population increases due to immigration programs in the 1890s and the sudden economic development that occurred in Brazil from 1960 to 1980, "The Economic Miracle Period", respectively. Isomeric ratios revealed that the PAHs had predominantly pyrolytic sources. The population, number of highways and electric energy consumption of Curitiba, as indices of socioeconomic development, were positively correlated with PAH deposition in the sediment core from 1855 to 1970, indicating the influence of socioeconomic development on the environmental load of sedimentary PAHs.
authors.affiliation: Department of Hydraulics and Sanitation, Federal University of Parana, Curitiba 81531-980, PR, Brazil. Electronic address: ksmachado@hotmail.com.
authors.forename: Karina S
authors.initials: KS
authors.lastname: Machado
authors.affiliation: Oceanographic Institute, University of São Paulo, Oceanographic Square, 191, São Paulo 05508-120, SP, Brazil.
authors.forename: Rubens C L
authors.initials: RC
authors.lastname: Figueira
authors.affiliation: LACAUT - Analysis Laboratory of Automotive Fuels, Department of Chemical Engineering, Federal University of Parana, Curitiba 81531-980, PR, Brazil.
authors.forename: Lilian C
authors.initials: LC
authors.lastname: Côcco
authors.affiliation: Department of Environmental Engineering, Federal University of Parana, Curitiba 81531-980, PR, Brazil.
authors.forename: Sandro
authors.initials: S
authors.lastname: Froehner
authors.affiliation: Department of Hydraulics and Sanitation, Federal University of Parana, Curitiba 81531-980, PR, Brazil.
authors.forename: Cristovão V S
authors.initials: CV
authors.lastname: Fernandes
authors.affiliation: Oceanographic Institute, University of São Paulo, Oceanographic Square, 191, São Paulo 05508-120, SP, Brazil.
authors.forename: Paulo A L
authors.initials: PA
authors.lastname: Ferreira
mesh_terms: D001938:Brazil; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D045483:Rivers / Q000737:chemistry*; D012923:Social Class; D012959:Socioeconomic Factors; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical
keywords: PAHs; Sediment core; Socioeconomic index; Source; Temporal distribution