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首页> 外文期刊>Separation and Purification Technology >Evaluation of the effect of the solution concentration and membrane morphology on the transport properties of Cu(II) through two monopolar cation-exchange membranes
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Evaluation of the effect of the solution concentration and membrane morphology on the transport properties of Cu(II) through two monopolar cation-exchange membranes

机译:通过两种单极阳离子交换膜对溶液浓度和膜形态对Cu(II)的运输性能的评价

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The transport properties of the heterogeneous HDX 100 and homogeneous PC-SK membranes were evaluated by chronopotentiometry for the treatment of the cyanide-free electroplating wastewater with copper ions in acid medium and they were related to the membranes morphology. It was determined the fraction of conductive area, limiting current density, ohmic resistance, plateau length and transport number for both membranes in different Cu2+ concentrations (0.1; 0.5, 1.0, 1.5 and 2.0 g/L) in pH 3. Typical current-voltage and chronopotentiometric curves of monopolar membranes were constructed and the obtained results showed that the PC-SK achieved a local concentration of cupric ions at the conductive regions greater than HDX and it affected some transport properties as the ohmic resistance. In addition, chronopotentiometric curves of a concentrated solution with 5 g Cu2+/L were also constructed and only the curves of PC-SK showed an additional inflexion point typical for bipolar membranes. Besides, a large amount of a blue solid material was formed and visually observed at the end of the experiment only with PC-SK and it is related to its homogeneity, low fraction of conducting regions, water content, and ion exchange capacity.
机译:通过计时管测定计量评估非均相HDX 100和均相PC-SK膜的运输性质,用于处理酸介质中的铜离子的无氰化电镀废水,它们与膜形态有关。确定不同Cu2 +浓度(0.1; 0.5,1.0,1.5和2.0g / L)的两种膜的导电面积,限制电流密度,欧姆抗性,平台长度和转运数量在pH 3中的典型电流 - 电压构建了单极膜的时间计量曲线,得到的结果表明,PC-SK在大于HDX的导电区域中实现了鉴定的铜离子的局部浓度,并且它影响了一些运输性能作为欧姆抗性。此外,还构建了浓缩溶液的浓缩溶液的时间计量曲线,并且只有PC-SK的曲线显示了双极膜典型的额外的Inflowion点。此外,仅在实验结束时形成了大量的蓝色固体材料,仅使用PC-SK,其均匀性,导电区域的低分数,水含量和离子交换能力有关。

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