title: Dissolved heavy metal(Cd, Pb, Cr, Ni) concentrations in surface water and porewater from Bahía Blanca estuary tidal flats.
abstract: The concentrations of dissolved cadmium, lead, chromium and níquel were determined in surface water column and pore water, collected from the extensive tidal plain at Bahía Blanca estuary, Argentina. Three different polluted areas were selected to study the spatial variation of these metals. The concentration ranges within the water column were slightly variable (Cd: 0.18-2.48 microg L(-1); Pb: 0.38-7.53 microg L(-1); Cr: 0.89-5.83 microg L(-1); Ni: 0.81-3.49 microg L(-1)), and displayed a clear gradient respect to the industrial area. Significant differences (contrast tests) between sites were detected for Cd, Pb and Ni. Very similar concentrations of Cd (0.18-3.41 microg L(-1)), Pb (0.38-5.83 microg L(-1)), Cr (0.89-9.37 microg L(-1)), Ni (0.81-6.56 microg L(-1)) were found in the porewater at all sites. The results suggested that both environmental compartments (water column and tidal flats porewater) may be affected by similar point and non-point heavy metal sources.
authors.affiliation: Area de Oceanografía Química, Instituto Argentino de Oceanografía (IADO), CRIBABB, CONICET, Florida 7500, Edificio E1, CC 804. B8000FWB, Bahía Blanca, Argentina. sbotte@criba.edu.ar
authors.forename: Sandra E
authors.initials: SE
authors.lastname: Botté
authors.forename: R Hugo
authors.initials: RH
authors.lastname: Freije
authors.forename: Jorge E
authors.initials: JE
authors.lastname: Marcovecchio
mesh_terms: D001118:Argentina; D002104:Cadmium / Q000032:analysis; D002857:Chromium / Q000032:analysis; D004784:Environmental Monitoring; D005618:Fresh Water / Q000032:analysis* / Q000737:chemistry; D005843:Geography; D007220:Industrial Waste; D007854:Lead / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis*; D008906:Mining; D009532:Nickel / Q000032:analysis; D012623:Seawater / Q000032:analysis* / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D007220:Industrial Waste; D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D002104:Cadmium; D002857:Chromium; D007854:Lead; D009532:Nickel