Characterization of Sasar and Firiza Rivers Water Quality on Specific Toxic Pollutants Regime ( metals)
Abstract
The Sasar River basin covers an area of 311 sq.km and it is situated in NW Romania. The investigated area is included, mainly, in the industrial area of the city of Baia Mare, an ar ea with ancient traditions related to the exploitation of non-ferrous ores. Therefore, the mining exploitation activities have created pressing conditions on the environmental and public health of the analyzed area.The dynamic indicators of water quality on specific toxic pollutants ( metals ) for the period 19982007 were analyzed in three sections located upstream and downstream from the industrial centers of Baia Sprie and Baia Mare.The analyses of the dynamics of heavy metals in the waters of the Sasar River have found that, the main issues are high Pb and Cu indicators for the upstream section of Baia Sprie; as for the section downstream of Baia Mare, the Zn, Cd and Mn indicators are found in such concentrations that their values determine a high level of toxicity for the monitoring section.There is a clear reduction trend in specific toxic pollutants for the upstream section of Baia Sprie. Special problems continue to be reported for zinc, cadmium, manganese and lead, for the sections downstream of Baia Mare and upstream from the confluence of the Sasar and Firiza Rivers.
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