Background concentrations Hg in lakes Khanty-Mansi Autonomous Area, Russia

The materials of the study: background concentrations mercury dissolved in water and precipitated bottom sediments 95 lakes. Methods: a total 332 samples lake 37 were collected during ecological monitoring petroleum deposit areas between 2007–2011. Results: mean concentration had values 0.046±0.012 mg/kg 0.025±0.014 waters, respectively. highest Hg found eluvial transeluvial positions, lowest – superaqual landscapes. was string bogs (ridge-hollow-pool complex bogs) mineral soils. There is general tendency to for an increase lakes from tundra zone through northern taiga middle subzone. However, characterized by significant (R = 0.4) south north due proportion same direction. Dissolved significantly (R=0.6) increased west east assessment seasonal dynamics contents showed that winter.