Comparison of the electrodialytic properties on NiSO4 and NiCl2: Influence of the salt nature in electrodialysis

✍ Scribed by Kamel-Eddine Bouhidel; Michel Rumeau

• Book ID: 104112665
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 158 KB
• Volume: 132
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/s0011-9164(00)00149-1

✦ Synopsis

This research work compares the electrodialytic properties of NiSO4 and NiCI2 during a batch process. The current intensity-time, pH-time, water Iransport-time plottings are investigated. We try to answer the following questions: (1) Why do NiSO4 and NiCI2 present very different electrodialytic properties? (2) Is it possible to anticipate the electrodialytic behavior and properties of a given salt? (3) What are the salt basic properties that influence directly its electrodialytic behavior? The pH-time curves are the more interesting results: the pH decreases with NiSO4 and increases with NiC12. The classical approaches do not explain this difference. In this study we try to defend this idea: the difference of the counterions mobilities in their respective membranes explains the pH changes.