CAJ | 학술논문

电去离子技术（EDI）是将电渗析与离子交换有机结合形成的一种新型膜分离技术，EDI膜堆的核心技术之一是填充材料的选择与应用。探讨了离子交换非织造布填充方式对膜堆电流、淡水室和浓水室出水电导率以及铜离子去除率等性能的影响。实验结果表明：采用离子交换非织造布缩短了离子的定向扩散和迁移距离，并有利于离子交换树脂的均匀填充，可明显提高离子迁移速率，使淡水室出水电导率大幅下降，浓水室出水电导率大幅上升，铜离子去除率提高；在三淡二浓膜堆结构中，全部填充离子交换非织造布的膜堆与只填充离子交换树脂的膜堆相比，其淡水室出水电导率下降至10％，浓水室出水电导率上升到10倍，淡水室出水的铜离子去除率达100％。填充非织造布的EDI装置在金属离子废水处理方面将具有广阔的应用前景。
전거리자기술（EDI）시장전삼석여리자교환유궤결합형성적일충신형막분리기술，EDI막퇴적핵심기술지일시전충재료적선택여응용。탐토료리자교환비직조포전충방식대막퇴전류、담수실화농수실출수전도솔이급동리자거제솔등성능적영향。실험결과표명：채용리자교환비직조포축단료리자적정향확산화천이거리，병유리우리자교환수지적균균전충，가명현제고리자천이속솔，사담수실출수전도솔대폭하강，농수실출수전도솔대폭상승，동리자거제솔제고；재삼담이농막퇴결구중，전부전충리자교환비직조포적막퇴여지전충리자교환수지적막퇴상비，기담수실출수전도솔하강지10％，농수실출수전도솔상승도10배，담수실출수적동리자거제솔체100％。전충비직조포적EDI장치재금속리자폐수처리방면장구유엄활적응용전경。
Electrodeionization ( EDI) is a new membrane separation technology of combining electrodialysis and ion exchange.One of the core EDI techniques is the seeking and application of filling materials.The effect of the filling pattern of ion exchange nonwovens on the EDI current, the electrical conductivities of the dilute and the concentrate exit waters, and the removal of copper ions were investigated.The results indicated that ion exchange nonwovens not only shortens the distance of directional diffusion and migration of ions, but also improves the filling uniform of ion exchange resin.As a result, the rate of ion migration of EDI stack increases significantly, and thus both the conductivity of concentrate exit water and the copper ( II) removal of the dilute exit soar up substantially, while the conductivity of the dilute exit decrease remarkably.For the membrane stack constructions of three-dilute two-concentrate system, the conductivity of dilute exit water was decreased by 90% while that of the concentrate exit rised by 9 times, and the copper ion removal reached up to nearly 100%, while the construction with all ion exchange nonwovens filled was compared with that only with the ion exchange resin.This finding exposes a broad prospect of the ion exchange nonwovens in the heavy metal ions wastewater treatment.