Electroflotation extraction of sparingly soluble compounds of non-ferrous and rare-earth metals from liquid technological waste

Abstract

The experimental results describing electroflotation extraction process are presented and analyzed for sparingly soluble compounds of non-ferrous and rare-earth metals, the influence of the disperse phase particle size and particle surface charge on the efficiency and electroflotation rate having been determined.

Electroflotation Extraction of Lanthanum and Scandium Hydroxides From Aqueous Solutions

“…Electrochemical technologies are widely used in the field of wastewater treatment and processing of technological solutions containing both inorganic [1][2][3][4][5][6][7][8][9][10][11]35] and organic [1,6,[12][13][14][15][16][17][18][19][20][21][22] pollutants. Electroflotation and electrocoagulation can be efficiently used not only in sewage treatment ISSN 2224-5278 with removal and destruction of pollutants, but also for separation of rare and scarce elements from aqueous solutions [6,10,23]. It seems promising to convert ions of scarce elements to the form of insoluble compounds, i.e.…”

Electroflotation Extraction of Sparingly Soluble Compounds of Titanium (TiO2) from Liquid Technogenic Waste

“…All non-ferrous heavy and rare earth metals and their compounds are toxic. The Studies conducted on the electroflotation of metal oxides and hydroxides [8,9] showed that the process is most efficient for particles of a dispersed phase with sizes from 10 to 100 microns, having a small positive or zero charge (ζ-potential equal to 0...+5 mV). With strongly negatively charged particles the process is less efficient.…”