The role of surfactants in the electroflotation extraction of copper, nickel, and zinc hydroxides and phosphates

Abstract

The effect of various surfactants on the physicochemical parameters (particle size and zeta poten tial) of the disperse phase of copper, nickel, and zinc hydroxides at concentrations of cationic, anionic, and nonionic surfactants of 2, 10, 50, and 100 mg/L at pH of 9.5-10.5 was studied. The efficiency of their elec troflotation extraction into a flotation froth was determined in a laboratory electroflotation module with anti wear oxide electrodes with efficiency of higher than 95% (initial concentration 50 mg/L, in the form of flo tation sludge, processing time no more than 30 min, current density 0.2 A/L).

Electroflotation Extraction of Lanthanum and Scandium Hydroxides From Aqueous Solutions

“…At the same time, the efficiency of electroflotation is increased greatly after adding surfactants into solutions under electroflotation treatment (table 1). Since SAS applied in the present study did not change -potential significantly, the positive effect is mainly due to increasing wettability of hydrated oxide particles caused by adsorption of surfactants molecules at their surface [9,[34][35][36]. The results presented in Table 1 show that electroflotation of La 2 O 3 •xH 2 O in the absence of surfactants is inefficient.…”

“…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].…”

Effect of Ultrasonic Cleaning of Titanium Turning Scraps Immersed in Alkaline Solution and Subsequent Preparation of Ferrotitanium Ingots

“…There have been many reports on the subject of cleaning oil contaminants [27][28][29]. Categories of oil washing can be classified into roll-up, emulsification, and solubilization mechanisms.…”

“…According to an earlier study on the cleaning of oils on substrates [27], the contact angle and wettability of the oil depend on the pH of the solution, and the Ti scraps tend to be washed well at a pH of 9.5−10.5 [29]…”

Various surface-active agents used in flotation technology for the removal of noxious pollutants from wastewater: a critical review

“…The most reduced level of extraction of about 5-8% was observed in the presence of PEO1500. 148 Silica nanoparticles (SNPs) of distinct sizes like 20, 100, and 500 nm were chosen for the models. The presentation of froths enhanced by SNPs and dual surfactants, in particular, cetyltrimethylammonium bromide and anionic sodium dodecyl sulfate, was scrutinized.…”