کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
643212 | 884361 | 2009 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Ageing of ion-exchange membranes in oxidant solutions Ageing of ion-exchange membranes in oxidant solutions](/preview/png/643212.png)
In electrodialysis processes, membranes tend to loose some transport properties after a certain period of utilization. Two ion-exchange membranes, namely a homogeneous anion-exchange membrane (MX) and a heterogeneous cation-exchange membrane (MK-40), were used to investigate the ageing phenomenon and to highlight the characteristic parameters of these membranes which evolve most quickly with ageing. An artificial ageing was carried out under oxidizing conditions (i.e. peracetic acid, and P3 Active Oxonia® solutions) on both membranes. It was found that an increase in conductivity and swelling rate, implying a modification of the polymer chain structure with time, but without a significant deterioration of the functional groups since the exchange capacity remained almost constant.
Journal: Separation and Purification Technology - Volume 69, Issue 1, 15 September 2009, Pages 43–47