Exploration of polyelectrolytes as draw solutes in forward osmosis processes

Handle URI:
http://hdl.handle.net/10754/562105
Title:
Exploration of polyelectrolytes as draw solutes in forward osmosis processes
Authors:
Ge, Qingchun; Su, Jincai; Amy, Gary L.; Chung, Tai Shung Neal
Abstract:
The development of the forward osmosis (FO) process has been constrained by the slow development of appropriate draw solutions. Two significant concerns related to draw solutions are the draw solute leakage and intensiveenergy requirement in recycling draw solutes after the FO process. FO would be much attractive if there is no draw solute leakage and the recycle of draw solutes is easy and economic. In this study, polyelectrolytes of a series of polyacrylic acid sodium salts (PAA-Na), were explored as draw solutes in the FO process. The characteristics of high solubility in water and flexibility in structural configuration ensure the suitability of PAA-Na as draw solutes and their relative ease in recycle through pressure-driven membrane processes. The high water flux with insignificant salt leakage in the FO process and the high salt rejection in recycle processes reveal the superiority of PAA-Na to conventional ionic salts, such as NaCl, when comparing their FO performance via the same membranes. The repeatable performance of PAA-Na after recycle indicates the absence of any aggregation problems. The overall performance demonstrates that polyelectrolytes of PAA-Na series are promising as draw solutes, and the new concept of using polyelectrolytes as draw solutes in FO processes is applicable. © 2011 Elsevier Ltd.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division
Publisher:
Elsevier BV
Journal:
Water Research
Issue Date:
Mar-2012
DOI:
10.1016/j.watres.2011.12.043
PubMed ID:
22239906
Type:
Article
ISSN:
00431354
Sponsors:
We thank the financial supports from Singapore National Research Foundation under its Competitive Research Program for the project entitled, "Advanced FO Membranes and Membrane Systems for Wastewater Treatment, Water Reuse and Seawater Desalination" (grant number: R-279-000-336-281) and King Abdullah University of Science and Technology (KAUST) (grant No. R-279-000-265-597). Special thanks are due to Mr. Weijie Lau for his valuable help.
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorGe, Qingchunen
dc.contributor.authorSu, Jincaien
dc.contributor.authorAmy, Gary L.en
dc.contributor.authorChung, Tai Shung Nealen
dc.date.accessioned2015-08-03T09:44:54Zen
dc.date.available2015-08-03T09:44:54Zen
dc.date.issued2012-03en
dc.identifier.issn00431354en
dc.identifier.pmid22239906en
dc.identifier.doi10.1016/j.watres.2011.12.043en
dc.identifier.urihttp://hdl.handle.net/10754/562105en
dc.description.abstractThe development of the forward osmosis (FO) process has been constrained by the slow development of appropriate draw solutions. Two significant concerns related to draw solutions are the draw solute leakage and intensiveenergy requirement in recycling draw solutes after the FO process. FO would be much attractive if there is no draw solute leakage and the recycle of draw solutes is easy and economic. In this study, polyelectrolytes of a series of polyacrylic acid sodium salts (PAA-Na), were explored as draw solutes in the FO process. The characteristics of high solubility in water and flexibility in structural configuration ensure the suitability of PAA-Na as draw solutes and their relative ease in recycle through pressure-driven membrane processes. The high water flux with insignificant salt leakage in the FO process and the high salt rejection in recycle processes reveal the superiority of PAA-Na to conventional ionic salts, such as NaCl, when comparing their FO performance via the same membranes. The repeatable performance of PAA-Na after recycle indicates the absence of any aggregation problems. The overall performance demonstrates that polyelectrolytes of PAA-Na series are promising as draw solutes, and the new concept of using polyelectrolytes as draw solutes in FO processes is applicable. © 2011 Elsevier Ltd.en
dc.description.sponsorshipWe thank the financial supports from Singapore National Research Foundation under its Competitive Research Program for the project entitled, "Advanced FO Membranes and Membrane Systems for Wastewater Treatment, Water Reuse and Seawater Desalination" (grant number: R-279-000-336-281) and King Abdullah University of Science and Technology (KAUST) (grant No. R-279-000-265-597). Special thanks are due to Mr. Weijie Lau for his valuable help.en
dc.publisherElsevier BVen
dc.subjectDesalinationen
dc.subjectDraw solutionen
dc.subjectForward osmosisen
dc.subjectPolyelectrolyteen
dc.subjectWater treatmenten
dc.titleExploration of polyelectrolytes as draw solutes in forward osmosis processesen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalWater Researchen
dc.contributor.institutionDepartment of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576, Singaporeen
kaust.authorAmy, Gary L.en
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