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|Title:||ORIGEM, DISTRIBUIÇÃO E BIODISPONIBILIDADE DE METAIS EM ÁGUAS, SEDIMENTOS E SOLOS DE UM TRECHO DA SUB-BACIA DO RIO PARAIBUNA, MG, BRASIL NITERÓI|
|Keywords:||Diagnóstico ambiental; Poluição; Curtume; Metalúrgica de zinco.; Environmental assessment; Pollution; Tannery; Zinc smelter.|
|Abstract:||The city of Juiz de Fora has over half a million inhabitants and is the fourth most important state of Minas Gerais. The city has a long industrial tradition, with emphasis on the existence of a leather and metal for decades that dump untreated sewage in the streams and rivers, and its main river is the Paraibuna. This study aimed to determine the extent of impacts generated by two point sources of pollution, a tannery and a zinc metal to the different environmental compartments (water, sediment and soil) in an industrial section of the city of Juiz de Fora, MG. We collected water samples, sediment and soil samples analyzed different parameters of environmental quality in situ and ex situ and compared to the CONAMA resolutions 344, 357 and 420, respectively. The analytical technique for the determination of metals was ICP OES and ICP-MS. The study revealed that in some places the concentrations of potentially toxic metals (Cd, Co, Cu, Pb, Mn, Ni and Zn) are above the maximum allowable resolutions. In addition, we observed the presence of high amounts of Cr +6 species in water samples, sediment and soil near the tannery. The geochemical fractionation confirmed the human origin of many metals in sediments and soils. The study results allowed us to infer that the untreated tannery effluent drops into a ditch, which in turn pollutes the marginal soils with metals, as the waters and sediments of the river Paraibuna, preventing the recommended uses for fresh waters class II. On the other hand, the metal pollutes the stream of Three Bridges which in turn overflows and contaminates the marginal soils, this stream also contaminates the water and sediments of the river Paraibuna. It was concluded that this stretch of the river sub-basin Paraibuna constitutes a fragile natural environment.|
|Appears in Collections:||TEDE sem arquivo|
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