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论文类型： 期刊论文

发表时间： 2018-02-01

发表刊物： Environmental science and pollution research international

收录刊物： SCIE、PubMed

卷号： 25

期号： 6

页面范围： 5752-5761

ISSN号： 1614-7499

关键字： Draw solute,Forward osmosis,Polyelectrolyte,Ultrafiltration

摘要： Reverse draw solute diffusion not only reduces the water flux in forward osmosis (FO), but also contaminates the feed solution and eventually increases the regeneration cost of draw solution. In the present study, a new polyelectrolyte was synthesized as FO draw solute to address this problem. Acrylic acid and sodium p-styrenesulfonate monomers with hydrophilic group were used to fabricate carboxylate polyelectrolyte through free radical polymerization reaction. Results demonstrated that the osmotic pressure of carboxylate polyelectrolyte solution had a good linear relationship with concentration, and the viscosity of 0.18g/mL solution was less than 5.4cP. Active layer facing draw solution produced the initial water flux of 11.77 LMH and active layer facing feed solution yielded the initial water flux of 6.68 LMH when the concentration of draw solution was 0.18g/mL. The reverse solute flux was around 1 gMH, and specific reverse solute flux of 0.18g/mL carboxylate polyelectrolyte draw solution was 0.11g/L which was much lower than that of traditional inorganic salts. Finally, diluted draw solution was regenerated via ultrafiltration, and the recovery efficiency of 94.78% was achieved. So, carboxylate polyelectrolyte can be suitable draw solute for FO.