Accumulation of Chromium and Lead in Bryophytes and Pteridophytes in a Stream Affected by Tannery Wastewater

Repula, Carolina; Quináia, Sueli; Campos, Bruna; Ganzarolli, Edgard; Lopes, Mauro
January 2012
Bulletin of Environmental Contamination & Toxicology;Jan2012, Vol. 88 Issue 1, p84
Academic Journal
The concentrations of Cr and Pb were determined in bryophytes and pteridophytes sampled in a stream near a tannery in Guarapuava, southern Brazil. The concentrations of Cr and Pb were measured by cathodic and anodic voltammetry, respectively. These plants were used to evaluate the spatial distribution of elements in the examined stream, and contained elevated levels of Cr (0.71-24.07 μg/g) and Pb (4.33-24.20 μg/g). Chromium levels in plants near the tannery greatly exceeded background levels, indicating a severe to extreme degree of contamination with this metal. Lead levels were elevated to a lesser degree, indicating slight to moderate contamination for most plants collected near the tannery.


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