title: Characterization of organic matter in a sediment Core near the Mataripe refinery, Bahia-Brazil.
abstract: A sediment core was taken from the Todos os Santos Bay, near the Mataripe Bahia-Brazil refinery. The results of dating, (210)Pb and (137)Cs methods, combined with organic indicators, Polycyclic aromatic hydrocarbons (PAHs), n-alkanes and total organic carbon (TOC), showed significant change with the start of production of the oil fields of Aratu, Itaparica and Dom João (1939-1947) and the construction of the Mataripe refinery (1949-1950). This event was marked by a series of significant changes, including an abrupt increase in TOC and the growth of PAH concentrations and the presence Unresolved/Resolved ratio (UR/R)>4 in n-alkanes fraction, which indicated that the contamination was of petrogenic origin. The δ(13)C of specific n-alkanes compounds showed gradual deplete with the depth.
authors.affiliation: Centro de Pesquisa em Geofísica e Geologia, Instituto de Física, Universidade Federal da Bahia, 40170-115 Salvador, Bahia, Brazil.
authors.forename: Alexandre Barreto
authors.initials: AB
authors.lastname: Costa
authors.affiliation: Centro de Pesquisa em Geofísica e Geologia, Instituto de Física, Universidade Federal da Bahia, 40170-115 Salvador, Bahia, Brazil.
authors.forename: José Roberto Bispo
authors.initials: JR
authors.lastname: de Souza
authors.affiliation: Centro de Pesquisa em Geofísica e Geologia, Instituto de Física, Universidade Federal da Bahia, 40170-115 Salvador, Bahia, Brazil.
authors.forename: Maria do Rosário
authors.initials: Mdo R
authors.lastname: Zucchi
authors.affiliation: Centro de Pesquisa em Geofísica e Geologia, Instituto de Física, Universidade Federal da Bahia, 40170-115 Salvador, Bahia, Brazil.
authors.forename: Antonio Expedito Gomes
authors.initials: AE
authors.lastname: de Azevedo
authors.affiliation: Centro de Pesquisa em Geofísica e Geologia, Instituto de Física, Universidade Federal da Bahia, 40170-115 Salvador, Bahia, Brazil.
authors.forename: Roberto Max
authors.initials: RM
authors.lastname: de Argollo
mesh_terms: D000473:Alkanes / Q000032:analysis; D001938:Brazil; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000473:Alkanes; D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical
keywords: (210)Pb and (137)Cs geochronology; PAHs; Sediment core; δ(13)C of specific n-alkanes compounds