title: Chromium fractionation and speciation in natural waters.
abstract: It is common for leather industries to dump chromium-contaminated effluent into rivers and other bodies of water. Thus, it is crucial to know the impacts caused by this practice to the environment. A study on chromium partitioning and speciation, with determination at trace levels, was carried out in a potentially contaminated creek. Chromium fractionation and speciation was performed using a flow-injection preconcentration system and detection by flame atomic absorption spectrometry. High levels of this element were found in the particulate material (449-9320 mg kg(-1)), which indicates its compatibility with this fraction. The concentration of Cr(iii) in the water samples collected ranged from 5.2-105.2 μg L(-1). Cr(vi) was always below of the DL (0.3 μg L(-1)). Chromium accumulation observed in the sediment (873-1691 mg kg(-1)) may confirm contamination due to the long term release of contaminated effluents in the creek.
authors.affiliation: Departamento de Química, Universidade Federal de São Carlos, PO Box 676, 13560-970 São Carlos, SP, Brazil.
authors.forename: Catarinie Diniz
authors.initials: CD
authors.lastname: Pereira
authors.forename: João Gabriel
authors.initials: JG
authors.lastname: Techy
authors.forename: Edgard Moreira
authors.initials: EM
authors.lastname: Ganzarolli
authors.forename: Sueli Pércio
authors.initials: SP
authors.lastname: Quináia
mesh_terms: D005591:Chemical Fractionation; D002857:Chromium / Q000032:analysis* / Q000737:chemistry; D004784:Environmental Monitoring; D005618:Fresh Water / Q000737:chemistry; D019015:Geologic Sediments / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D014874:Water Pollutants, Chemical; D002857:Chromium