title: Evaluation of metals and hydrocarbons in sediments from a tropical tidal flat estuary of Southern Brazil.
abstract: Although the Passagem Channel estuary, Espírito Santo State, Brazil, is located in an urbanized and industrialized region, it has a large mangrove system. Here we examined natural and anthropogenic inputs that may influence trace metal (Cd, Cr, Cu, Ni, Sc, Pb and Zn) and hydrocarbon (n-alkane and terpane) deposition in three sediment cores collected in the tidal flat zone of the estuary. The cores were also analyzed for carbonate, grain size and stable isotopic composition (δ(13)Corg. and δ(15)Ntotal). Metal enrichment and its association to petroleum hydrocarbons in the surficial sediments of one of the cores, indicate crude oil and derivative inputs, possibly from small vessels and road run-off from local heavy automobile traffic. At the landward sites, the major contributions for metals and hydrocarbons are from natural sources, but in one case, Cu may have been enriched by domestic effluent inputs.
authors.affiliation: Departamento de Oceanografia e Ecologia, Universidade Federal do Espírito Santo, Brazil. Electronic address: eduoceano@gmail.com.
authors.forename: Eduardo S
authors.initials: ES
authors.lastname: Costa
authors.affiliation: Departamento de Oceanografia e Ecologia, Universidade Federal do Espírito Santo, Brazil. Electronic address: carolinegrilo@gmail.com.
authors.forename: Caroline F
authors.initials: CF
authors.lastname: Grilo
authors.affiliation: School of Environmental Sciences, University of Liverpool, United Kingdom. Electronic address: wolff@liverpool.ac.uk.
authors.forename: George A
authors.initials: GA
authors.lastname: Wolff
authors.affiliation: School of Environmental Sciences, University of Liverpool, United Kingdom. Electronic address: anu@liverpool.ac.uk.
authors.forename: Anu
authors.initials: A
authors.lastname: Thompson
authors.affiliation: Instituto Oceanográfico, Universidade de São Paulo, Brazil. Electronic address: rfigueira@usp.br.
authors.forename: Rubens Cesar Lopes
authors.initials: RCL
authors.lastname: Figueira
authors.affiliation: Departamento de Oceanografia e Ecologia, Universidade Federal do Espírito Santo, Brazil. Electronic address: rrneto@gmail.com.
authors.forename: Renato Rodrigues
authors.initials: RR
authors.lastname: Neto
mesh_terms: D001938:Brazil; D002247:Carbon Isotopes / Q000032:analysis; D002254:Carbonates / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods; D063366:Estuaries; D019015:Geologic Sediments / Q000032:analysis; D006838:Hydrocarbons / Q000032:analysis*; D008670:Metals / Q000032:analysis*; D009587:Nitrogen Isotopes / Q000032:analysis; D010578:Petroleum; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D002247:Carbon Isotopes; D002254:Carbonates; D006838:Hydrocarbons; D008670:Metals; D009587:Nitrogen Isotopes; D010578:Petroleum; D014874:Water Pollutants, Chemical
keywords: Estuary; Isotopes; Terpanes; Transition metals; n-alkanes