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- Publisher Website: 10.1016/j.watres.2017.12.072
- Scopus: eid_2-s2.0-85040023626
- PMID: 29306703
- WOS: WOS:000425205400010
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Article: Trace organic contaminant rejection by aquaporin forward osmosis membrane: Transport mechanisms and membrane stability
Title | Trace organic contaminant rejection by aquaporin forward osmosis membrane: Transport mechanisms and membrane stability |
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Authors | |
Keywords | Aquaporin membrane Forward osmosis Membrane stability Trace organic contaminant Transport mechanism |
Issue Date | 2018 |
Publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/watres |
Citation | Water Research, 2018, v. 132, p. 90-98 How to Cite? |
Abstract | We investigated transport mechanisms of trace organic contaminants (TrOCs) through aquaporin thin-film composite forward osmosis (FO) membrane, and membrane stability under extreme conditions with respect to TrOC rejections. Morphology and surface chemistry of the aquaporin membrane were characterised to identify the incorporation of aquaporin vesicles into membrane active layer. Pore hindrance model was used to estimate aquaporin membrane pore size as well as to describe TrOC transport. TrOC transport mechanisms were revealed by varying concentration and type of draw solutions. Experimental results showed that mechanism of TrOC transport through aquaporin-embedded FO membrane was dominated by solution-diffusion mechanism. Non-ionic TrOC rejections were molecular-weight dependent, suggesting steric hindrance mechanisms. On the other hand, ionic TrOC rejections were less sensitive to molecular size, indicating electrostatic interaction. TrOC transport through aquaporin membrane was also subjected to retarded forward diffusion where reverse draw solute flux could hinder the forward diffusion of feed TrOC solutes, reducing their permeation through the FO membrane. Aquaporin membrane stability was demonstrated by either heat treatment or ethanol solvent challenges. Thermal stability of the aquaporin membrane was manifested as a relatively unchanged TrOC rejection before and after the heat treatment challenge test. By contrast, ethanol solvent challenge resulted in a decrease in TrOC rejection, which was evident by the disappearance of the lipid tail of the aquaporin vesicles from infrared spectrum and a notable decrease in the membrane pore size. |
Persistent Identifier | http://hdl.handle.net/10722/263238 |
ISSN | 2023 Impact Factor: 11.4 2023 SCImago Journal Rankings: 3.596 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Xie, M | - |
dc.contributor.author | Luo, W | - |
dc.contributor.author | Guo, H | - |
dc.contributor.author | Nghiem, LD | - |
dc.contributor.author | Tang, C | - |
dc.contributor.author | Gray, SR | - |
dc.date.accessioned | 2018-10-22T07:35:43Z | - |
dc.date.available | 2018-10-22T07:35:43Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Water Research, 2018, v. 132, p. 90-98 | - |
dc.identifier.issn | 0043-1354 | - |
dc.identifier.uri | http://hdl.handle.net/10722/263238 | - |
dc.description.abstract | We investigated transport mechanisms of trace organic contaminants (TrOCs) through aquaporin thin-film composite forward osmosis (FO) membrane, and membrane stability under extreme conditions with respect to TrOC rejections. Morphology and surface chemistry of the aquaporin membrane were characterised to identify the incorporation of aquaporin vesicles into membrane active layer. Pore hindrance model was used to estimate aquaporin membrane pore size as well as to describe TrOC transport. TrOC transport mechanisms were revealed by varying concentration and type of draw solutions. Experimental results showed that mechanism of TrOC transport through aquaporin-embedded FO membrane was dominated by solution-diffusion mechanism. Non-ionic TrOC rejections were molecular-weight dependent, suggesting steric hindrance mechanisms. On the other hand, ionic TrOC rejections were less sensitive to molecular size, indicating electrostatic interaction. TrOC transport through aquaporin membrane was also subjected to retarded forward diffusion where reverse draw solute flux could hinder the forward diffusion of feed TrOC solutes, reducing their permeation through the FO membrane. Aquaporin membrane stability was demonstrated by either heat treatment or ethanol solvent challenges. Thermal stability of the aquaporin membrane was manifested as a relatively unchanged TrOC rejection before and after the heat treatment challenge test. By contrast, ethanol solvent challenge resulted in a decrease in TrOC rejection, which was evident by the disappearance of the lipid tail of the aquaporin vesicles from infrared spectrum and a notable decrease in the membrane pore size. | - |
dc.language | eng | - |
dc.publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/watres | - |
dc.relation.ispartof | Water Research | - |
dc.subject | Aquaporin membrane | - |
dc.subject | Forward osmosis | - |
dc.subject | Membrane stability | - |
dc.subject | Trace organic contaminant | - |
dc.subject | Transport mechanism | - |
dc.title | Trace organic contaminant rejection by aquaporin forward osmosis membrane: Transport mechanisms and membrane stability | - |
dc.type | Article | - |
dc.identifier.email | Guo, H: guohao7@hku.hk | - |
dc.identifier.email | Tang, C: tangc@hku.hk | - |
dc.identifier.authority | Tang, C=rp01765 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.watres.2017.12.072 | - |
dc.identifier.pmid | 29306703 | - |
dc.identifier.scopus | eid_2-s2.0-85040023626 | - |
dc.identifier.hkuros | 295700 | - |
dc.identifier.volume | 132 | - |
dc.identifier.spage | 90 | - |
dc.identifier.epage | 98 | - |
dc.identifier.isi | WOS:000425205400010 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.issnl | 0043-1354 | - |