title: Trace metal concentrations in tropical mangrove sediments, NE Brazil.
abstract: Sediment cores were taken from the mangroves of the Coreaú River estuary off the northeast coast of Brazil. They were analyzed for grain size, CaCO3, organic matter, and trace metal (Cd, Pb, Zn, Cu, Al, and Fe) contents. Mud texture was the predominant texture. Levels of trace metals in surface sediments indicated strong influence of anthropogenic processes, and diagenetic processes controlled the trace metal enrichment of core sediments of this estuary. The positive relationships between trace metals and Al and Fe indicate that Cu, Zn, Pb, and Cd concentrations are associated mainly with Al and Fe oxy-hydroxides and have natural sources.
authors.affiliation: Programa de Pós-graduação em Ciências Marinhas Tropicais, Brazil; Universidade de Fortaleza, Campus P.O. BOX 1321, 60811-905 Fortaleza, CE, Brazil. Electronic address: bmiola@gmail.com.
authors.forename: Brígida
authors.initials: B
authors.lastname: Miola
authors.affiliation: Instituto de Ciências do Mar, Universidade Federal do Ceará, P.O BOX. 3207, 60165-081 Fortaleza, CE, Brazil.
authors.forename: Jáder Onofre de
authors.initials: JO
authors.lastname: Morais
authors.affiliation: Instituto de Ciências do Mar, Universidade Federal do Ceará, P.O BOX. 3207, 60165-081 Fortaleza, CE, Brazil.
authors.forename: Lidriana de Souza
authors.initials: Lde S
authors.lastname: Pinheiro
mesh_terms: D000535:Aluminum / Q000032:analysis / Q000737:chemistry; D001938:Brazil; D002119:Calcium Carbonate / Q000032:analysis / Q000737:chemistry; D004784:Environmental Monitoring; D063366:Estuaries; D019015:Geologic Sediments / Q000737:chemistry*; D007501:Iron / Q000032:analysis / Q000737:chemistry; D019216:Metals, Heavy / Q000032:analysis* / Q000737:chemistry; D045483:Rivers / Q000737:chemistry; D014329:Tropical Climate; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D053833:Wetlands
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D000535:Aluminum; D007501:Iron; D002119:Calcium Carbonate
keywords: Core sediments; Mangroves; Northeast coast of Brazil; Trace metals