BASIC REGULARITIES OF ELECTROFLOTOSORPTION EXTRACTION OF ANIONIC AND CATIONIC SURFACTANTS FROM WATER SOLUTIONS

The process of sorption extraction of surfactants has been studied experimentally: sodium dodecyl sulfate (NaDDS) and didecyldimethylammonium chloride (SEPTAPAV) on freshly formed iron (III) hydroxides, aluminum (III), copper (II), nickel (II) and zinc (II) highly dispersed coal of OU-B grade. It has been found that the degree of removal and adsorption of surfactants depends on the ratio of the metal / surfactant concentration in the aqueous solution. It was shown that the highest values of adsorption are observed at high concentrations of anionic surfactant (sodium dodecyl sulfate) more than 250 mg / l in aqueous solution simultaneously with ions above these metals in the ratio metal / surfactant 1:3. For cationic surfactant (SEPTAPAV), high adsorption rates are observed on iron hydroxide at initial surfactant concentrations from 500 to 750 mg/l. The possibility of electroflotation extraction of metal hydroxides (aluminum, iron) and surfactants in the case of both the presence of heavy metal ions and surfactants in the aqueous solution is also estimated. In addition, an electroflotation extraction of highly dispersed activated carbon of OU-B grade was carried out in the presence of non-ferrous metal hydroxides and surface-active substances of various natures from aqueous solutions. It was established that flotation and sorption in the hydroxide-surfactant system strongly depends on the critical concentration of mycel formation. The increase in the degree of extraction of particles of highly dispersed activated carbon of OU-B grade is observed in the presence of hardly soluble iron (III) hydroxides, aluminum (III) hydroxides. Based on the research, the elements of the technological scheme of the electroflotation of sewage of complex composition are given.