Selective flotation of zinc (II) and cadmium (II) ions from dilute aqueous solutions in the presence of halides
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Technical University of Częstochowa
Wrocław University of Technology
Pedagogical University of Czestochowa
Publication date: 2001-01-01
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Władysław Walkowiak   

Institute of Inorganic Chemistry and Metallurgy of Rare Elements, Wrocław University of Technology, 50-370 Wrocław, Wybrzeże Wyspiańskiego 27 Street
Physicochem. Probl. Miner. Process. 2001;35(1):21–29
An experimental investigation is presented of the batch ion flotation of zinc(II) and cadmium(II) ions from dilute aqueous solutions with sodium dodecylbenzenesulfonate (DBSNa) as an anionic surfactant and cetylpyridinium chloride (CPCl) as a cationic surfactant. The effect of halides, i.e. fluorides, chlorides, bromides, and iodides, on the selectivity of cadmium(II) over zinc(II) is established. Separation of Cd(II) and Zn(II) ions by DBSNa is not occurred. The separation of Cd(II)/Zn(II) by CPCl in presence of halides at concentration range of 0.001 M to 1.0 M increases in sequence: F- < Cl- < Br- < I-.