Research into the problem of oil refineries waste water pollution by cyanides
The present paper describes the problem of oil refineries waste water pollution by cyanides. Compounds relating to the class of cyanides are highly toxic and can cause serious harm to the ecosystem, even in low concentrations. Today there is no single-valued data that refineries waste water are the source of cyanides environment pollution, therefore the Russian refinery waste waters were selected for investigation. In the article the results of cyanides concentration level in wastewater after mechanical treatment are given. It was found that the concentrations of cyanide in wastewater, both of Russian and foreign oil refineries exceed the maximum permissible concentrations of discharges into water bodies of different purpose. Treatment technologies overview for cyanides removal from waste water is presented. The necessity of continuous monitoring of this indicator in refineries waste water is justified.