Dynamics of mercury concentrations in wastewater from the Usolye-Sibirskoye industrial zone in periods with different technogenic loads

Abstract. Usoliekhimprom is one of the most hazardous technogenic facilities in Irkutsk Region, which triggers importance environmental monitoring. To establish current hazard during period its closure, we analyzed interannual dynamics mercury concentrations plant wastewater . The results revealed that toxicant closure were lower than operational period. However, it was not possible to completely cease influx with into environment after plant. high primarily due localized sites extensive pollution area electrolysis shop and surface runoff from entire industrial site Usoliekhimprom.