Dataset associated with the paper "Chronopotentiometric study on the simultaneous transport of EDTA ionic species and hydroxyl ions through an anion-exchange membrane for electrodialysis applications"

This dataset contains experimental results on the simultaneous transport of EDTA species and hydroxyl ions through an anion-exchange membrane during electrodialysis under alkaline conditions. Chronopotentiometric measurements and current–voltage curves were obtained using solutions at different pH values and electrolyte concentrations. Speciation diagrams are also present. The dataset is suitable for studies on pH-dependent ion transport, the use of complexing agents in electrodialysis, and electrochemical diagnostics of anion-exchange membranes. The data used to generate the figures are provided in the corresponding Excel worksheets. Each dataset is specified below. Figure 4a: Chronopotentiograms registered for solutions with EDTA in 1.5 × 10−3 mol·L−1 at pH 9. Figure 4b: Chronopotentiograms registered for solutions with EDTA in 1.5 × 10−3 mol·L−1 at pH 10. Figure 4c: Chronopotentiograms registered for solutions with EDTA in 1.5 × 10−3 mol·L−1 at pH 11. Figure 4d: Chronopotentiograms registered for solutions with EDTA in 1.5 × 10−3 mol·L−1 at pH 12. Figure 4e: Derivative of the membrane potential drop with respect to time obtained for the solutions at pH 9 and 10. Figure 4f: Derivative of the membrane potential drop with respect to time obtained for the solutions at pH 11 and 12. Figure 5: Speciation diagrams shown as (a) log [C] and (b) fraction of ionic species versus pH constructed for 1.5 × 10−3 mol·L−1 EDTA solution. Figure 7: Current-voltage curves constructed for 1.5 × 10−3 mol·L−1 EDTA solution at pH (a) 9, (b) 10, (c) 11, and (d) 12. Figure 8a:Chronopotentiograms constructed for solutions at pH 11 and EDTA concentration of 1.5 × 10−4 mol·L−1. Figure 8b: Chronopotentiograms constructed for solutions at pH 11 and EDTA concentration of 1.5 × 10−2 mol·L−1. Figure 8c: Derivative of the membrane potential drop with respect to time obtained for EDTA solutions at 1.5 × 10−4 mol·L−1 and 1.5 × 10−2 mol·L−1. Figure 9: Speciation diagram constructed for the solution at EDTA concentration of (a) 1.5 × 10−4 mol·L−1 and (b) 1.5 × 10−2 mol·L−1. pH 11. Figure 10: Dependence of iτ1/2 on current density for the EDTA solutions in 1.5 × 10−4 mol·L−1 and 1.5 × 10−2 mol·L−1. Figure 11: Current-voltage curves constructed for solutions at pH 11 and EDTA concentration of (a) 1.5 × 10−4 mol·L−1 and (b) 1.5 × 10−2 mol·L−1.本数据集收录了碱性条件下电渗析过程中，乙二胺四乙酸（EDTA）离子与氢氧根离子同时通过阴离子交换膜（anion-exchange membrane）的实验结果。实验通过调控溶液pH值与电解质浓度，获取了计时电位测试数据与电流-电压曲线，同时包含离子形态分布图。 本数据集适用于pH依赖型离子传输、电渗析中络合剂应用以及阴离子交换膜电化学诊断相关研究。 用于生成各图表的原始数据已收录于对应Excel工作表中，各数据集的具体说明如下。 图4a：针对pH为9、浓度为1.5×10⁻³ mol·L⁻¹的EDTA溶液记录的计时电位图。 图4b：针对pH为10、浓度为1.5×10⁻³ mol·L⁻¹的EDTA溶液记录的计时电位图。 图4c：针对pH为11、浓度为1.5×10⁻³ mol·L⁻¹的EDTA溶液记录的计时电位图。 图4d：针对pH为12、浓度为1.5×10⁻³ mol·L⁻¹的EDTA溶液记录的计时电位图。 图4e：针对pH为9与10的溶液测得的膜电势降对时间的导数曲线。 图4f：针对pH为11与12的溶液测得的膜电势降对时间的导数曲线。 图5：针对1.5×10⁻³ mol·L⁻¹的EDTA溶液构建的离子形态分布图，其中(a)为log[C]与pH的关系，(b)为离子形态占比与pH的关系。 图7：针对pH分别为(a)9、(b)10、(c)11、(d)12的1.5×10⁻³ mol·L⁻¹ EDTA溶液构建的电流-电压曲线。 图8a：针对pH为11、EDTA浓度为1.5×10⁻⁴ mol·L⁻¹的溶液构建的计时电位图。 图8b：针对pH为11、EDTA浓度为1.5×10⁻² mol·L⁻¹的溶液构建的计时电位图。 图8c：针对EDTA浓度分别为1.5×10⁻⁴ mol·L⁻¹与1.5×10⁻² mol·L⁻¹的溶液测得的膜电势降对时间的导数曲线。 图9：针对pH为11、EDTA浓度分别为(a)1.5×10⁻⁴ mol·L⁻¹与(b)1.5×10⁻² mol·L⁻¹的溶液构建的离子形态分布图。 图10：针对浓度为1.5×10⁻⁴ mol·L⁻¹与1.5×10⁻² mol·L⁻¹的EDTA溶液，iτ^(1/2)随电流密度的变化关系。 图11：针对pH为11、EDTA浓度分别为(a)1.5×10⁻⁴ mol·L⁻¹与(b)1.5×10⁻² mol·L⁻¹的溶液构建的电流-电压曲线。