432
R. Kh. Sharipov et al.
0
5
10
15
20
25
30
35
40
45
50
0
30
60
90
120 150 180 210 240 270 300
Degree of extraction, Zn, %
τ, min
0,1M NaOH
0,5M NaOH
T = 25˚C; Current density i = 100 A / m
2 ; S: L (1:10); cathode - SGE; anode - graphite;
Fig. 1 Degree of zinc extraction by electroleaching collective concentrate depending on the
concentration of sodium hydroxide
0
10
20
30
40
50
60
70
0
30
60
90 120 150 180 210 240 270 300
Degree of extraction Pb, %
τ, min
0,1M NaOH
0,5M NaOH
T = 25˚C; Current density i = 100 A / m
2
; S: L (1:10); cathode - SGE; anode - graphite;
Fig. 2 Degree of lead extraction by electroleaching collective concentrate depending on the
concentration of sodium hydroxide
conductivity of the solution decreases markedly and the nature of the change in
electrical conductivity does not meet the generally accepted point of view which
is to say that the mechanism of the electrical conductivity of inorganic aqueous
solutions of which an increase in the concentration of cations and anions increases
the electrical conductivity of the inorganic aqueous solution.