High efficiency water treatment system using forward osmosis ion barrier membranes

人们对正向渗透（FO）系统的兴趣日益浓厚。在本研究中，我们制备了基于pva的带电FO膜（FO- ib膜），并在FO体系中测量了膜电位和离子渗透系数，以研究膜电位和离子渗透系数之间的关系。FO- ib膜的水通量为2.6 L/m2h，是市售FO膜的1.6倍。在FO-IB膜的P层和N层中，阴离子的渗透系数增大，阳离子的渗透系数减小，并随膜电位的增大而增大。在使用FO测试膜模块进行的FO渗透试验中，以含有钙离子的FS作为有害离子模型，在DS侧未检测到钙离子，并且在FS溶液中浓度为3.7倍。

There has been a growing interest in forward osmosis (FO) systems. In this research, we prepared PVA-based charged FO membranes (FO-IB membranes) and measured membrane potential and ion permeability coefficient in an FO system to investigate the relationship between membrane potential and ionic permeability. The water flux of the FO-IB membranes was 2.6 L/m2h, which is 1.6 times greater than the value for commercially available FO membranes. In the P and N layers of the FO-IB membranes, the permeability coefficient of anions increased, and that of cations decreased, with increasing membrane potential of the layers. In the FO permeation test using an FO test membrane module, and FS containing calcium ions as a model for harmful ions, Calcium ions were not detected on the DS side, and were concentrated by a factor of 3.7 in the FS solution.