Recent Developments and Future Challenges of Hydrogels as Draw Solutes in Forward Osmosis Process

Recent Developments and Future Challenges of Hydrogels as Draw Solutes in Forward Osmosis Process

Forward osmosis (FO) has been recently regarded as a promising water treatment technology due to its lower energy consumption and lower membrane fouling propensity compared to the reverse osmosis (RO). The absence of suitable draw solute constraints the wide-range application of the FO. Hydrogels ar...

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Main Authors: Jichao Wang, Shanshan Gao, Jiayu Tian, Fuyi Cui, Wenxin Shi
Format: Article
Language:English
Published: MDPI AG 2020-03-01
Series:Water
Subjects:
forward osmosis
draw solute
hydrogel
Online Access:https://www.mdpi.com/2073-4441/12/3/692
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spelling doaj-dfa16791c0ac491d946e88aadf4f4beb2020-11-25T03:03:25ZengMDPI AGWater2073-44412020-03-0112369210.3390/w12030692w12030692Recent Developments and Future Challenges of Hydrogels as Draw Solutes in Forward Osmosis ProcessJichao Wang0Shanshan Gao1Jiayu Tian2Fuyi Cui3Wenxin Shi4State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, ChinaSchool of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401, ChinaState Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, ChinaCollege of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400044, ChinaCollege of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400044, ChinaForward osmosis (FO) has been recently regarded as a promising water treatment technology due to its lower energy consumption and lower membrane fouling propensity compared to the reverse osmosis (RO). The absence of suitable draw solute constraints the wide-range application of the FO. Hydrogels are three-dimensional hydrophilic polymer networks that can absorb a huge amount of water. Particularly, stimuli-responsive polymer hydrogels can undergo a reversible volume change or solution-gel phase transition in response to external environmental stimuli, including temperature, light, pressure, solvent composition, and pH. These intrinsic properties indicate the lowest regeneration cost of draw solutes compared to the thermal method and other membrane processes. This review aims to introduce the research progress on hydrogels as draw solutes, clarify the existing problems and point out the further research direction.https://www.mdpi.com/2073-4441/12/3/692forward osmosisdraw solutehydrogel
collection DOAJ
language English
format Article
sources DOAJ
author Jichao Wang
Shanshan Gao
Jiayu Tian
Fuyi Cui
Wenxin Shi
spellingShingle Jichao Wang
Shanshan Gao
Jiayu Tian
Fuyi Cui
Wenxin Shi
Recent Developments and Future Challenges of Hydrogels as Draw Solutes in Forward Osmosis Process
Water
forward osmosis
draw solute
hydrogel
author_facet Jichao Wang
Shanshan Gao
Jiayu Tian
Fuyi Cui
Wenxin Shi
author_sort Jichao Wang
title Recent Developments and Future Challenges of Hydrogels as Draw Solutes in Forward Osmosis Process
title_short Recent Developments and Future Challenges of Hydrogels as Draw Solutes in Forward Osmosis Process
title_full Recent Developments and Future Challenges of Hydrogels as Draw Solutes in Forward Osmosis Process
title_fullStr Recent Developments and Future Challenges of Hydrogels as Draw Solutes in Forward Osmosis Process
title_full_unstemmed Recent Developments and Future Challenges of Hydrogels as Draw Solutes in Forward Osmosis Process
title_sort recent developments and future challenges of hydrogels as draw solutes in forward osmosis process
publisher MDPI AG
series Water
issn 2073-4441
publishDate 2020-03-01
description Forward osmosis (FO) has been recently regarded as a promising water treatment technology due to its lower energy consumption and lower membrane fouling propensity compared to the reverse osmosis (RO). The absence of suitable draw solute constraints the wide-range application of the FO. Hydrogels are three-dimensional hydrophilic polymer networks that can absorb a huge amount of water. Particularly, stimuli-responsive polymer hydrogels can undergo a reversible volume change or solution-gel phase transition in response to external environmental stimuli, including temperature, light, pressure, solvent composition, and pH. These intrinsic properties indicate the lowest regeneration cost of draw solutes compared to the thermal method and other membrane processes. This review aims to introduce the research progress on hydrogels as draw solutes, clarify the existing problems and point out the further research direction.
topic forward osmosis
draw solute
hydrogel
url https://www.mdpi.com/2073-4441/12/3/692
work_keys_str_mv AT jichaowang recentdevelopmentsandfuturechallengesofhydrogelsasdrawsolutesinforwardosmosisprocess
AT shanshangao recentdevelopmentsandfuturechallengesofhydrogelsasdrawsolutesinforwardosmosisprocess
AT jiayutian recentdevelopmentsandfuturechallengesofhydrogelsasdrawsolutesinforwardosmosisprocess
AT fuyicui recentdevelopmentsandfuturechallengesofhydrogelsasdrawsolutesinforwardosmosisprocess
AT wenxinshi recentdevelopmentsandfuturechallengesofhydrogelsasdrawsolutesinforwardosmosisprocess
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