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Distribution and origin of polycyclic aromatic hydrocarbons in surface sediments from an urban river basin at the Metropolitan Region of Curitiba,Brazil

查看全文 作　　者：Natalicio Ferreira [1]Leite;Patricio Peralta-[2]Zamora;Marco Tadeu [2]Grassi 高影响力作者 机构地区：[1]Instituto de Tecnologia do Paran(TECPAR),81350-010 Curitiba,Brazil;[2]Departamento de Química,Universidade Federal do Parana'(UFPR),C.P.19081,81531-990 Curitiba,Brazil高影响力机构 出　　处：《Journal of Environmental Sciences》索引2011年第23卷第6期,共8页高影响力期刊 摘　　要：The concentrations of 16 polycyclic aromatic hydrocarbons(PAHs) were determined in surface sediment samples from nine sites located at the Iguau River Basin in the Metropolitan Region of Curitiba,Brazil to evaluate their distribution and sources.The total concentration of the PAHs was greater for sediments from highly urbanized areas,while the sediments from the Iraí Environmental Protection Area(Iraí EPA) showed significantly low concentrations.The sediments from the Iguau and Barigui rivers were classified as highly contaminated,while those from the Cercado and Curralinho rivers were classified as moderately contaminated.The predominance of PAHs containing two to four aromatic rings in most of the samples suggested the direct input of raw sewage into the water resources evaluated.Benzo[g,h,i]perylene,dibenzo[a,h]anthracene and indeno[1,2,3-cd]pyrene were predominant in sediments from the areas under the greatest urban and industrial development.The correlation between thermodynamic stability and the kinetics of evolution presented by the isomeric pairs indicated that combustion is the predominant source of PAHs in the sediments because the combustion of fossil fuels affected most of the points evaluated,followed by combustion of biomass and eventually combustion of oil product inputs.In general,the results showed that areas under strong urban influence,as well as the Iraí EPA,receive contributions of PAHs from similar sources. 关 键 词：表层沉积物 城市化地区 河流流域 多环芳烃 巴西 都市圈 PAHs 起源
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