Flotation extraction of copper and zinc ions with N-nonanoyl-N’-methanesulfonylhydrazine

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Abstract

The patterns of concentrating Cu(II) and Zn(II) ions from aqueous solutions with N-nonanoyl-N’-mesylhydrazine by the ion flotation method were studied, depending on the initial concentration of the collagents, the pH value of the solution, conditioning time, and temperature. Based on IR spectroscopy and elemental analysis data, a hypothesis about the composition of the floated compounds was made. It was shown that the extraction of Zn(II) is significantly dependent on the initial concentration of the metal and the conditioning time of the solution. A decrease in the extraction degree of the studied ions with an increase in the solution temperature was established, with this effect being more pronounced for Cu(II). The kinetics of the process were described using the classical first-order model; the obtained flotation rate constants for Zn(II) ions were five times higher than for Cu(II). The conditions for the selective separation of Cu(II) ions in collective flotation conditions were determined.

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About the authors

V. N. Vaulina

Institute of Technical Chemistry, Ural Branch, Russian Academy of Sciences

Email: larchek.07@mail.ru
Russian Federation, 614013 Perm

L. G. Chekanova

Institute of Technical Chemistry, Ural Branch, Russian Academy of Sciences

Author for correspondence.
Email: larchek.07@mail.ru
Russian Federation, 614013 Perm

A. B. Mulyukova

Institute of Technical Chemistry, Ural Branch, Russian Academy of Sciences

Email: larchek.07@mail.ru
Russian Federation, 614013 Perm

A. V. Kharitonova

Institute of Technical Chemistry, Ural Branch, Russian Academy of Sciences

Email: larchek.07@mail.ru
Russian Federation, 614013 Perm

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Supplementary files

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2. Scheme 1. Structural formula of N-nonanoyl-N-methanesulfonylhydrazine.

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3. Fig. 1. Dependence of the degree of flotation extraction of Zn(II) ions on pHequal ∙ cZn(initial), mg/l: 1 – 41.0, 2 – 14.8; [Zn(II)] : [MNG] = 1 : 1; τcond = 30 min, τfl = 10 min.

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4. Fig. 2. Dependence of the degree of flotation extraction of Cu(II) ions on pHequal ∙ cCu(initial), mg/l: 1 – 46.1, 2 – 12.3; [Cu] : [MNG] = 1 : 2; τcond = 10 min, τfl = 10 min.

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5. Fig. 3. IR spectra of the collector (a) and sublates of Cu(II) (b) and Zn(II) (c).

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6. Fig. 4. Dependence of the degree of extraction of Cu(II) and Zn(II) ions on pHequal with their joint presence in solution. cMe(II)(initial), mg/l: Cu – 19.96, Zn – 24.24; [Me(II)] : [LMWH] = 1 : 2; τcond = 30 min, τfl. = 10 min.

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7. Fig. 5. Kinetics of ion flotation of Zn(II) depending on the conditioning time. cZn(initial) = 14.8 mg/l, [Zn(II)] : [MNG] = 1 : 1, pH 8.0−8.5.

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8. Fig. 6. Kinetics of Cu(II) ion flotation depending on conditioning time. cCu(initial) = 46.1 mg/l, [Cu] : [LMWH] = 1 : 2, pH 6.2−6.8.

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9. Fig. 7. Effect of temperature on the degree of flotation extraction of Zn(II) and Cu(II) ions. cMe(II)(initial), mg/l: Cu – 46.1, Zn – 42.2; [Zn] : [LMWH] = 1 : 1, [Cu] : [LMWH] = 1 : 2; τcond, min: Zn – 30, Cu – 10; τfl, min: Zn – 10, Cu – 10.

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