location: Current position: Home >> Scientific Research >> Paper Publications

Preparation and assessment of carboxylate polyelectrolyte as draw solute for forward osmosis.

Hits:

Indexed by:期刊论文

First Author:Cui Hongtao

Correspondence Author:Zhang, HM (reprint author), Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn, MOE, Linggong Rd 2, Dalian 116024, Peoples R China.

Co-author:Zhang Hanmin,Jiang Wei,Yang Fenglin

Date of Publication:2018-02-01

Journal:Environmental science and pollution research international

Included Journals:SCIE、PubMed

Volume:25

Issue:6

Page Number:5752-5761

ISSN No.:1614-7499

Key Words:Draw solute,Forward osmosis,Polyelectrolyte,Ultrafiltration

Abstract: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.

Pre One:Sludge decrement and electricity generation of sludge microbial fuel cell enhanced by zero valent iron

Next One:Performance evaluation of electric-responsive hydrogels as draw agent in forward osmosis desalination