title: Seasonal distribution of aliphatic hydrocarbons in the Vaza Barris Estuarine System, Sergipe, Brazil.
abstract: The seasonal assessment of anthropogenic activities in the Vaza Barris estuarine river system, located in the Sergipe state, northeastern Brazil, was performed using the aliphatic hydrocarbon distribution. The aliphatic hydrocarbon and isoprenoid (Pristane and Phytane) concentrations ranged between 0.19 μg g(-1) and 8.5 μg g(-1) of dry weight. Data were analyzed using Kruskal-Wallis test, with significance level set at p<0.05, and no seasonality distribution change was observed. The Carbon Preference Index (CPI), associated with <SIGMA> n-alkanes/n-C16, Low Molecular Weight/High Molecular Weight ratio (LMW/HMW) and Terrigenous to Aquatic Ratio (TAR) suggested biogenic input of aliphatic hydrocarbons for most samples, with significant contribution of higher plants.
authors.affiliation: Universidade Federal de Sergipe, Departamento de Química, Jardim Rosa Elze, São Cristóvão, SE 49100-000, Brazil.
authors.forename: José Carlos S
authors.initials: JC
authors.lastname: Barbosa
authors.affiliation: Universidade Federal de Sergipe, Departamento de Química, Jardim Rosa Elze, São Cristóvão, SE 49100-000, Brazil.
authors.forename: Lukas G G V
authors.initials: LG
authors.lastname: Santos
authors.affiliation: Universidade Federal de Sergipe, Departamento de Química, Jardim Rosa Elze, São Cristóvão, SE 49100-000, Brazil.
authors.forename: Mércia V S
authors.initials: MV
authors.lastname: Sant'Anna
authors.affiliation: Universidade Federal de Sergipe, Departamento de Química, Jardim Rosa Elze, São Cristóvão, SE 49100-000, Brazil.
authors.forename: Michel R R
authors.initials: MR
authors.lastname: Souza
authors.affiliation: Universidade Federal de Sergipe, Departamento de Química, Jardim Rosa Elze, São Cristóvão, SE 49100-000, Brazil.
authors.forename: Flaviana C
authors.initials: FC
authors.lastname: Damasceno
authors.affiliation: Universidade Federal de Sergipe, Departamento de Química, Jardim Rosa Elze, São Cristóvão, SE 49100-000, Brazil. Electronic address: mralexandre@ufs.br.
authors.forename: Marcelo R
authors.initials: MR
authors.lastname: Alexandre
mesh_terms: D000473:Alkanes; D001938:Brazil; D004784:Environmental Monitoring; D063366:Estuaries; D019015:Geologic Sediments; D006838:Hydrocarbons / Q000032:analysis*; D045483:Rivers; D012621:Seasons; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D000473:Alkanes; D006838:Hydrocarbons; D014874:Water Pollutants, Chemical
keywords: Aliphatic hydrocarbons; Estuarine; GC–MS; Geochemical markers; Sediment; Sergipe