DOI: 10.5281/zenodo.18494953
title: Dataset associated with the paper "Membrane electrolysis for recovering Sb and Bi from elution solutions of ion-exchange resins used in copper electrorefining: A cyclic voltammetric study"

description: This dataset contains cyclic voltammetric data related to the extraction and electrodeposition of antimony (Sb) and bismuth (Bi) from hydrochloric acid elution solutions using a membrane electrolysis system with a cation-exchange membrane.

The data evaluate the influence of key operating parameters, including Sb and Bi concentrations, HCl concentration, solution dilution, temperature, and the presence of thiourea and iron as impurities. These data are suitable for studies on critical raw material recovery, membrane electrolysis optimization, and multicomponent electrochemical systems.

The data used to generate the figures are provided in the corresponding Excel worksheets. Each dataset is specified below.

Figure 2:  Speciation diagram constructed for the solution of (a) Sb (1 g/L) + HCl (6 M), (b) Bi (0.1 g/L) +HCl (6 M), and (c) Sb (1 g/L) +Bi (0.1 g/L) +HCl (6 M).

Figure 3:  Cyclic voltammograms constructed at a scan rate of 0.02 V/s with solutions of Sb (1 g/L) + HCl (6 M), Bi (0.1 g/L) + HCl (6 M), Sb (1 g/L) +Bi (0.1 g/L) +HCl (6 M)

Figure 4a: Cyclic voltammograms for solutions of Sb + HCl at different scan rates (0.005 - 0.10 V/s). 

Figure 4b: Cyclic voltammograms for solutions of Bi + HCl at different scan rates (0.005 - 0.10 V/s).

Figure 4c: Cyclic voltammograms for solutions of Sb + Bi + HCl at different scan rates (0.005 - 0.10 V/s).

Figure 5:  Relation of the square root of scan rate and current density of the reduction peaks obtained with the solutions of Sb + HCl, Bi + HCl, and Sb + Bi + HCl, respectively.

Figure 6a: Cyclic voltammograms for solutions of Sb + HCl at different concentrations of metals (0.25 - 4.0 g/L for Sb(III). 

Figure 6b: Cyclic voltammograms for solutions of Bi + HCl at different concentrations of metals (0.025 - 0.40 g/L for Bi(III). 

Figure 6c: Cyclic voltammograms for solutions of Sb Bi + HCl at different concentrations of metals (0.25 - 4.0 g/L for Sb(III) and 0.025 - 0.40 g/L for Bi(III)).

Figure 7a: Cyclic voltammograms for solutions of Sb + HCl at different HCl concentrations (4 M - 7 M). 

Figure 7b: Cyclic voltammograms for solutions of Bi + HCl at different HCl concentrations (4 M - 7 M). 

Figure 7c: Cyclic voltammograms for solutions of Sb + Bi + HCl at different HCl concentrations (4 M - 7 M). 

Figure 8a: Cyclic voltammograms for solutions of Sb + HCl prepared with different dilution factors (35 %, 50 %, 75 % and the original one - 100 %). 

Figure 8b: Cyclic voltammograms for solutions of Bi + HCl prepared with different dilution factors (35 %, 50 %, 75 % and the original one - 100 %).

Figure 8c: Cyclic voltammograms for solutions of Sb + Bi + HCl prepared with different dilution factors (35 %, 50 %, 75 % and the original one - 100 %).

Figure 9a: Cyclic voltammograms for solutions of Sb + HCl at different temperatures (20 °C, 30 °C, 40 °C and 50 °C). 

Figure 9b: Cyclic voltammograms for solutions of Bi + HCl at different temperatures (20 °C, 30 °C, 40 °C and 50 °C).

Figure 9c: Cyclic voltammograms for solutions of Sb + Bi + HCl at different temperatures (20 °C, 30 °C, 40 °C and 50 °C).

Figure 10: Arrhenius plot for the solution of Bi + HCl.

Figure 11a: Cyclic voltammograms for solutions of Sb + HCl + thiourea with different thiourea/Sb molar ratios 

Figure 11b: Cyclic voltammograms for solutions of Bi + HCl + thiourea with different thiourea/Bi molar ratios

Figure 11c: Cyclic voltammograms for solutions of Sb + Bi + HCl + thiourea with different thiourea/Bi molar ratios

Figure 12a: Cyclic voltammograms for solutions of Sb + HCl + Fe.

Figure 12b: Cyclic voltammograms for solutions of Bi + HCl + Fe.

Figure 12c: Cyclic voltammograms for solutions of Sb + Bi + HCl + Fe.

Figure S1:  Speciation diagram constructed for the solution of (a) Sb (0.25 g/L – 4 g/L) + HCl (6 M), (b) Bi (0.025 g/L – 0.4 g/L) + HCl (6 M), and (c) Sb (0.25 g/L – 4 g/L) + Bi (0.025 g/L – 0.4 g/L) + HCl (6 M).

Figure S2:  Speciation diagram constructed for the solution of (a) Sb (1 g/L) + HCl (4 M   7 M), (b) Bi (0.1 g/L) + HCl (4 M   7 M), and (c) Sb (1 g/L) + Bi (0.1 g/L) + HCl (4 M   7 M).

Figure S3:  Speciation diagram constructed for the diluted solution of (a) Sb + HCl, (b) Bi + HCl, and (c) Sb + Bi + HCl presenting 35%, 50% and 75% of Sb, Bi and HCl concentration in relation to the original solution (100%).

Figure S4:  Speciation diagram constructed for the solution of (a) Sb (1 g/L) + HCl (6 M) + Fe3+ (0.1 g/L), (b) Bi (0.1 g/L) + HCl (6 M) + Fe3+ (0.1 g/L), and (c) Sb (1 g/L) + Bi (0.1 g/L) + HCl (6 M) + Fe3+ (0.1 g/L).