Flotation of zinc(II) and cadmium(II) ions from dilute aqueous solutions in the presences of inorganic ligands
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Technical University of Czestochowa
Wroclaw University of Technology
Publication date: 2002-01-01
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Władysław Walkowiak   

Institute of Inorganic Chemistry and Metallurgy of Rare Elements, Wroclaw University of Technology, 50-370 Wroclaw, Wybrzeze Wyspianskiego 27 Street
Physicochem. Probl. Miner. Process. 2002;36(1):225-232
An experimental investigation is presented on competitive flotation of zinc(II) and cadmium(II) ions from dilute aqueous solutions with sodium dodecylbenzenesulfonate (DBSNa) as the anionic surfactant and hexadecylpyridinium chloride (CPCl) as the cationic surfactant. The effect of inorganic ligands, i.e. cyanides, thiocyanides, sulfates, thiosulfates, nitrates, and perchlorates 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 inorganic ligands at concentration range from 0.01 M to 1.0 M increases in the sequence: CN- ≤ SCN- < SO42- < S2O42-.
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