Dataset associated with the paper "Evaluation of mass transfer behaviour of sulfamethoxazole species at ion–exchange membranes by chronopotentiometry for electrodialytic processes"

This dataset contains chronopotentiometric data on the transport of sulfamethoxazole (SMX) through cation- and anion-exchange membranes during electrodialysis using synthetic solutions at different concentrations and pH conditions. The data include membrane potential drop profiles obtained in underlimiting and overlimiting current conditions, current-voltage curves, transition times and speciation diagrams, which were used to identify dominant mass transfer mechanisms and sorption phenomena. This dataset is suitable for studies on ion transport, sorption effects in ion-exchange membranes, and the optimization of electrodialytic treatment of pharmaceutical contaminants. The data used to generate the figures are provided in the corresponding Excel worksheets. Each dataset is specified below. Figure 1: Speciation diagrams for the solutions at SMX concentrations of (a) 0.001 g/L, (b) 0.005 g/L, (c) 0.01 g/L and (d) 0.1 g/L constructed with the aid of Chemicalize software Figure 2a: Chronopotentiograms for the cation-exchange membrane with SMX solutions at pH 1.6 and concentration of 0.001 g/L. Figure 2b: Chronopotentiograms for the cation-exchange membrane with SMX solutions at pH 1.6 and concentration of 0.005 g/L. Figure 2c: Chronopotentiograms for the cation-exchange membrane with SMX solutions at pH 1.6 and concentration of 0.01 g/L. Figure 2d: Chronopotentiograms for the cation-exchange membrane with SMX solutions at pH 1.6 and concentration of 0.1 g/L. Figure 3: Dependence of iτ0.5 on current density for the cation-exchange membrane with SMX solutions at pH 1.6 and concentrations of 0.001 g/L, 0.005 g/L, 0.01 g/L and 0.1 g/L. Figure 4: Current-voltage curves for the cation-exchange membrane with SMX solutions at pH 1.6 and concentrations of 0.001 g/L, 0.005 g/L, 0.01 g/L, and 0.1 g/L. Figure 5a: Chronopotentiograms for the anion-exchange membrane with SMX solutions at pH 9 and concentrations of 0.001 g/L. Figure 5b: Chronopotentiograms for the anion-exchange membrane with SMX solutions at pH 9 and concentrations of 0.005 g/L. Figure 5c: Chronopotentiograms for the anion-exchange membrane with SMX solutions at pH 9 and concentrations of 0.01 g/L. Figure 5d: Chronopotentiograms for the anion-exchange membrane with SMX solutions at pH 9 and concentrations of 0.1 g/L. Figure 6: Current-voltage curves for the anion-exchange membrane with SMX solutions at 0.001 g/L, 0.005 g/L, 0.01 g/L, and 0.1 g/L. Figure S4: Values of limiting current density (ilim) in function of the (a) cationic and (b) anionic equivalent charge of the solutions tested with the (a) cation-exchange membrane and (b) anion-exchange membrane.