Spatial distribution of hg and as in rivers of the eastern amazon impacted by gold mining

Human activities contribute to the contamination of rivers by toxic elements, causing serious effects on health traditional communities in Amazon region. With aim verifying spatial distribution Hg and As concentrations a region affected gold mining Baú, Curuá, Curuaés River basin, municipality Altamira-PA, Brazilian Amazon, study was carried out using geostatistical maps. The quantification elements performed Inductively Coupled Plasma Emission Spectrometry with hydride generation (HGICP-OES). obtained values were exported for use computational processes QGIS Surfer software, order produce isotheor results maps showed that exceeded limit established National Council Environment, which is 0.2 µg L-1. This indicates presence represents threat ecosystem these rivers. On other hand, no station presented above allowed this element, 10 Based results, effective monitoring areas can be used as tool control river water quality.