1985 Volume 11 Issue 4 Pages 394-399
The effect of coexistent substances in copper-leaching solutions on the extraction rate by liquid surfactant membranes was investigated experimentally, using a stirred cell.
Kerosene and Span 80 were used as oil phase and surfactant, respectively. LIX64N or SME529 was used as the extraction reagent. The effect of the concentrations of Fe3+, Cl-, NO3- and SO42- on the copper extraction rate were examined. The following results were obtained. 1) The presence of Cl- increases the extraction rate, while that of SO42- decreases the rate. The concentration of NO3- does not influence the extraction rate. 2) A higher extraction rate by Cl- is noticeable when pH is less than 2, independently of the kind of cation, such as Na+, NH4+ and Fe3+. 3) The effect of the presence of Fe3+ on the copper extraction rate is insignificant.
