電透析系統應用於離子調控技術之研究

A Study on the Application of Electrodilysis System in Ion Control Technology

林俊穎(Jyun-Ying Lin)

指導教授 ： 張添晉

國立臺北科技大學/工程學院/環境規劃與管理研究所/碩士(2007年)

摘要

電透析(Electrodialysis, ED)技術屬薄膜程序之ㄧ，最初發展時係作為海水淡化之用，近年來隨著薄膜技術之進步，電透析系統之應用性亦隨之提升。傳統上，電透析系統常作為超純水製程中之ㄧ環或用以回收、處理工業廢水中之有價金屬、有害物質，然而，面臨各類不同用水需求，一套固定的電透析系統勢必無法完全符合各類用水需求，有鑑於此，電透析系統中之離子遷移特性便相對重要。在本研究中，期能透過操作自行設計之電透析模組以瞭解水中陰、陽離子之分離、濃縮特性，以利於後續電透析研究之進行，進而達到調控水中離子物種濃度之效並產出符合不同需求之用水。
本研究透過文獻蒐集與彙整以瞭解電透析系統之基礎理論，並透過實驗操作以瞭解不同離子物種(Na+、Ca2+、Mg2+、Cl-、NO3-、SO42-)在不同電壓下於電透析系統中之分離、濃縮情形。實驗結果顯示操作電壓越高則操作效率越佳，但隨電壓升高，各離子物種之濃縮效率增加度並非等比例上升，其中以SO42-之濃縮效率受操作電壓提高而上升之情形最為顯著。此外，在離子濃縮效率方面，以Na+ 與Cl-之離子濃縮效率較佳；在脫鹽室中，陽離子物種之分離效率普遍高於陰離子物種。由本研究之研究成果，可瞭解不同離子物種在不同電壓、電流下之離子濃縮、分離特性，並且作為後續相關研究之基礎，以期能在未來的研究上，透過操作電透析系統達到離子調控之效，進而產出符合各類不同需求之用水。

關鍵字

電透析 ； 離子調控技術 ； 薄膜程序

並列摘要

Electrodialysis is a kind of membrane process, developed for desalination of sea water. There have been great progress in membrane technology in recent years, electrodialysis system is applied extensively now. In traditional electrodialysis system, usually there will be an ultra-pure water process or recycle, treat value metal in industrial waste water and hazardous material, however, different kinds of water requirement require an immobile electrodialysis process to be fitted in with every kind of water requirement. As a result, the characteristic of transference of ions in electrodialysis system is important. This study focuses on understanding the characteristic of transfer of ions by operating a self-designed electrodialysis module and controls the concentration of ions to conform to different water requirement.
The research requires searching information to understand the basic theory of electrodialysis system, also an experiment was carried out to understand the transference of ions under various voltages. The experiment shows that the higher voltage, the higher efficiency, when the voltage rises up, the ion concentration is not affected or influenced by geometric ratio. The SO42- concentrate efficiency is the most obviously when the voltage rises up. In addition to ion concentrate efficiency, Na+ and Cl- ions are the best in concentration efficiency, in dilute compartment and the cation separation efficiency is higher than anion. The result of this study makes us to understand the characteristic of concentration and separation of ions at various voltage and electric current. For the basis of related study, target to achieve controlling the various concentration of ions and to conform to different water requirements.

並列關鍵字

Electrodialysis ； Ion control ； Membrane process

參考文獻

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