Complex Treatment of Industrial Waste Water Containing Non-Ferrous Metals

Abstract

In this paper, a method is proposed for the complex treatment of technical waste water containing essential concentrations of organomineral impurities including 1 g/dm³ of copper ions. Plasma treatment decreases the chemical oxygen demand of a solution by 17 times, the content of salts by 34%, and the copper and iron concentration by 20%. Electrodialysis decreases the total salt content from 3 to 0.2 g/dm³ and brings the copper and iron content to 8 and 3 mg/dm³, respectively. The destruction of organic substances contained in the water under plasma treatment results in a carbon-containing precipitate studied by physicochemical methods to determine structural and sorption characteristics. The FTIR spectrum of the carbon-containing precipitate indicates the presence of hydrophilic groups and a great amount of uncompensated active sites and free radicals, which can be used in sorption processes. The prospects of using the carbon-containing precipitate as a filler for the desalination chambers of an electrodializer under electrical field application is shown.