Forward osmosis using draw solutions manifesting liquid-liquid phase separation
Forward osmosis using draw solutions manifesting liquid-liquid phase separation
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DOI：
10.1016/j.desal.2017.05.036
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发表时间：
2017-11-01
期刊：
影响因子：
9.9
通讯作者：
Sundaresan, Sankaran
中科院分区：
文献类型：
--
作者：
Darvishmanesh, Siavash;Pethica, Brian A.;Sundaresan, Sankaran
近年来，使用汲取剂通过正渗透进行脱盐，汲取剂的再生通过液-液相分离辅助，这一点受到了广泛关注。在本研究中，两种不同的二醇醚，三丙二醇甲基醚和三丙二醇正丁基醚的混合物，作为潜在的汲取剂进行了研究。在不同的混合物组成、浓度和温度下测量了汲取溶液的水活度、粘度和扩散系数。这些汲取溶液的渗透压随着温度的升高而强烈降低。用这些汲取溶液进行的正向渗透实验揭示了明显的跨膜水通量、反向溶质通量和严重的浓差极化的初始损失。
Desalination via forward osmosis using draw agents whose regeneration is aided via liquid-liquid phase separation has gained much attention in recent years. In the present study, mixtures of two different glycol ethers, tripropylene glycol methyl ether and tripropylene glycol n-butyl ether, have been studied as potential draw agents. Water activity, viscosity and diffusion coefficient of draw solutions have been measured at different mixture compositions, concentrations and temperatures. Osmotic pressures of these draw solutions decreases strongly with increasing temperature. Forward osmosis experiments performed with these draw solutions reveal appreciable initial loss of trans-membrane water flux, reverse solute flux and severe concentration polarization.