Produção Nacional
Chromium fractionation and speciation in natural waters
2012; Royal Society of Chemistry; Volume: 14; Issue: 6 Linguagem: Inglês
10.1039/c2em10949b
ISSN1464-0333
AutoresCatarinie Diniz Pereira, João Gabriel Techy, Edgard Moreira Ganzarolli, Sueli Pércio Quináia,
Tópico(s)Heavy metals in environment
ResumoIt 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.
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