Arsenic contamination of water ecosystems under technogenic load
The geoecological situation at the Chelyabinsk is characterized and assessment of arsenic contamination of its water ecosystems by content analysis of this substance by nuclear-absorbing spedrophotometer method in rain and surface water, hydrophyte and bottom sediments is carried out. Urgency of this research is caused by existence of the local arsenic sources in the form of heat power installations burning coal and the burning waste heaps of coal mines. Results of the analysis showed that arsenic content in rain and surface water was though lower than its maximum permissible concentration established for water objects of economic-drinking use, but was of one order that synonymously points on significant contribution of atmospheric precipitations in this substance contamination of river and lake water. In this case arsenic content increased on current course of the Miass river in water by 1.5 times, in a common reed grass by 1.3 times, and bottom sediments by 2.1 times that testifies about rise of technogenic load on the river ecosystem.