Sodium Tetraethylenepentamine Heptaacetate as Novel Draw Solute for Forward Osmosis-Synthesis, Application and Recovery
Sodium Tetraethylenepentamine Heptaacetate as Novel Draw Solute for Forward Osmosis-Synthesis, Application and Recovery
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DOI：
10.3390/en81112344
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发表时间：
2015-11-01
期刊：
影响因子：
3.2
通讯作者：
Wang, Yan
中科院分区：
文献类型：
--
作者：
Long, Qing Wu;Wang, Yan
Osmotic energy, as a sustainable energy source with little environmental impact, has drawn much attention in both academia and industry in recent years. Osmotically driven membrane processes can harvest the osmotic energy and thus have great potential to produce sustainable clean water or electric energy. The draw solution, as an osmotic component, has been more and more explored by scientists in recent years in order to achieve a high osmotic pressure and suitable molecular size. In this work, a novel draw solutesodium tetraethylenepentamine heptaacetate (STPH)is synthesized and identified by nuclear magnetic resonance spectroscopy (H-1-NMR) and Fourier transform infrared (FTIR). Its solution properties are optimized in terms of the solution pH and concentration, and related to the forward osmosis (FO) performance. A water flux of 28.57 LMH and a low solute flux of 0.45 gMH can be generated with 0.5 g/mL STPH draw solution and de-ionized water (DI water) as the feed solution under pressure retarded osmosis (PRO) mode, which is superior to the FO performance with many other draw solutes reported. Further FO desalination test shows a stable water flux of 9.7 LMH with 0.3 g/mL STPH draw solution and 0.6 M NaCl feed solution. In addition, the draw solution recovery is also investigated.
