Desalination of water with high conductivity using membrane-free electrodeionization

作者：Shen, Xiaolan; Li, Tianjun; Jiang, Xiaping; Chen, Xueming^*

来源：Separation and Purification Technology, 2014, 128: 39-44.

DOI：10.1016/j.seppur.2014.03.011

• Membrane-free electrodeionization
• Purification
• High purity water
• Electrical regeneration
• Resins

Our previous work has shown that membrane-free electrodeionization (MFEDI) is a promising process for high purity water (HPW) production. However, this technique was only suitable to feed water with low conductivity, usually below 20 mu s/cm. To extend the applicable range, type I strong base resin was used together with type II strong base resin in this work, due to the high capacity and easy regeneration of type II strong base resin and the excellent purification performance of type I strong base resin. It was demonstrated that although the conductivity of the feed water increased to 50 mu S/cm, effective purification was still achieved, with effluent conductivity being 0.056-0.066 mu S/cm only. The average conductivity of the concentrate collected during regeneration was over 380 mu S/cm, indicating high regenerating efficiency. The water recovery reached 86% and the power consumption was 1.5 kW h/m(3) water. In addition, repetitive experimental results showed that the MFEDI system could work stably.

• 出版日期2014-5-13
• 单位浙江大学