化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2013年
12期
2819-2825,2836
,共8页
电泳膜接触器%电渗析%超滤膜
電泳膜接觸器%電滲析%超濾膜
전영막접촉기%전삼석%초려막
electrophoretic membrane contactor%electrodialysis%ultrafiltration membranes
电泳膜接触器（EMC）是在传统电渗析器中引入多孔膜，或用多孔膜代替部分离子交换膜的一种新型膜分离技术，其中多孔膜作为两液流的接触界面，提供传质的场所，垂直于液流方向的电场是唯一的驱动力。本文介绍了EMC的工作原理，并简要概述了EMC的膜堆构型及运行模式。详细分析了进料液pH值、电场强度等操作参数、多孔膜的材质和截留相对分子质量等对EMC过程传质的影响，且对EMC运行过程中多孔膜的污染状况进行了探讨，并展望了EMC在生物大分子分离和纯化中的应用潜力。EMC中多孔膜的引入，使得EMC可以用于相对分子质量大于500 Da的生物分子的分离与纯化，进一步拓宽了电渗析的应用领域，而外加电场的作用能够有效减轻多孔膜的污染，因此，EMC在生物分子的分离与纯化方面具有广阔的应用前景。
電泳膜接觸器（EMC）是在傳統電滲析器中引入多孔膜，或用多孔膜代替部分離子交換膜的一種新型膜分離技術，其中多孔膜作為兩液流的接觸界麵，提供傳質的場所，垂直于液流方嚮的電場是唯一的驅動力。本文介紹瞭EMC的工作原理，併簡要概述瞭EMC的膜堆構型及運行模式。詳細分析瞭進料液pH值、電場彊度等操作參數、多孔膜的材質和截留相對分子質量等對EMC過程傳質的影響，且對EMC運行過程中多孔膜的汙染狀況進行瞭探討，併展望瞭EMC在生物大分子分離和純化中的應用潛力。EMC中多孔膜的引入，使得EMC可以用于相對分子質量大于500 Da的生物分子的分離與純化，進一步拓寬瞭電滲析的應用領域，而外加電場的作用能夠有效減輕多孔膜的汙染，因此，EMC在生物分子的分離與純化方麵具有廣闊的應用前景。
전영막접촉기（EMC）시재전통전삼석기중인입다공막，혹용다공막대체부분리자교환막적일충신형막분리기술，기중다공막작위량액류적접촉계면，제공전질적장소，수직우액류방향적전장시유일적구동력。본문개소료EMC적공작원리，병간요개술료EMC적막퇴구형급운행모식。상세분석료진료액pH치、전장강도등조작삼수、다공막적재질화절류상대분자질량등대EMC과정전질적영향，차대EMC운행과정중다공막적오염상황진행료탐토，병전망료EMC재생물대분자분리화순화중적응용잠력。EMC중다공막적인입，사득EMC가이용우상대분자질량대우500 Da적생물분자적분리여순화，진일보탁관료전삼석적응용영역，이외가전장적작용능구유효감경다공막적오염，인차，EMC재생물분자적분리여순화방면구유엄활적응용전경。
The electrophoretic membrane contactor (EMC) is a novel membrane separation technology in which porous membranes are stacked or replaced partial ion exchange membranes by porous membranes in conventional electrodialysis cell. The porous membranes act as the contact interface between the two liquid streams where the mass transfer takes place. The voltage,applied in a direction perpendicular to the flows,is the only driving force. This review paper described the principles of EMC. Cell configuration and operation mode of EMC were briefly discussed. The influences of important operation factors,such as pH of solution and electric field strength,polymer materials and molecular weight cutoff of porous membranes on the mass transfer of EMC process were analyzed in detail. Pollution status of the porous membranes during the operation of EMC was explored and the application potential of EMC in separation and purification of biomacromolecules was discussed. EMC further extends the application field of electrodialysis by using of porous membrane,which could be used in separation and purification of biomolecules greater than 500 Da. Membrane fouling could be effectively minimized due to external electric field.
