期刊
DESALINATION AND WATER TREATMENT
卷 21, 期 1-3, 页码 109-114出版社
DESALINATION PUBL
DOI: 10.5004/dwt.2010.1268
关键词
Ion exchange membrane; Modification; Water splitting; H+(OH-) ions generation; Electrodialysis; Hybrid baro-electromembane technologies
资金
- Russian Foundation for Basic Research [NN 08-08-01047, 09-08-96523]
- Federal Special Purposes Program [N 2010-1.1-234-069-020]
A way of improvement of electrornembrane technology for water production required in heat-and-power engineering by applying modified anion exchange membranes is proposed. The novel membranes are produced by treatment of commercial Russian heterogeneous MA-40 membranes with a polyelectrolyte bearing quaternary ammonium groups. It is found that this modification results in lowering the rate of H+ and OH- ions generation (water splitting) at overlimiting currents and in a considerable increase in current efficiency due to the decrease in the OH- ions transfer across the anion-exchange membrane. Moreover, we observed an increment in the salt counterion transfer through the membrane. The decrease in water splitting rate at the interface 'anion-exchange membrane/depleted solution' leads to increasing pH in the desalting compartment and decreasing pH in the concentrating one. As a consequence, the risk of the salt precipitation on the membrane surface in the concentrating compartment is reduced, and the removal of weak acids from the desalting water is found enhanced.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据