Imperial College London
Alternate

Prof Andrew G. Livingston

Faculty of Engineering, Department of Chemical Engineering

Visiting Professor
 
 
 
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Contact

 

+44 (0)20 7594 5582a.livingston Website

 
 
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Assistant

 

Miss Jessica Baldock +44 (0)20 7594 5699

 
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Location

 

413ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Li:2017:10.1016/j.memsci.2017.04.005,
author = {Li, Y and Klosowski, MM and McGilvery, CM and Porter, AE and Livingston, AG and Cabral, JT},
doi = {10.1016/j.memsci.2017.04.005},
journal = {JOURNAL OF MEMBRANE SCIENCE},
pages = {9--17},
title = {Probing flow activity in polyamide layer of reverse osmosis membrane with nanoparticle tracers},
url = {http://dx.doi.org/10.1016/j.memsci.2017.04.005},
volume = {534},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We investigate the flow activity of the nanostructured polyamide layer in reverse osmosis (RO) membrane, using gold nanoparticle (NP) tracers of 1–40 nm diameter. Following a detailed structural examination of a commercial SW30RH membrane selected for this study, NP solutions were infiltrated from either the polyamide front or the polysulfone support side. The permeate was then analyzed spectroscopically while the entrapment of NPs within the membrane was mapped by high resolution electron microscopy. Results show that back-filtered NPs exhibited a fractionated distribution according to size: 1 nm nanoparticles permeate across the polyamide-polysulfone interface reaching the interior of the polyamide corrugations, while the larger ones (>10 nm) are retained within the polysulfone and gradually arrested at approximately 100 nm below the polyamide-polysulfone interface. Intermediate-sized 5 nm nanoparticles reached the undulating folds just below the polyamide layer. Permeation pathways across polyamide layer appear to exclude all tracers above 1 nm, which become selectively distributed across the polyamide layer: positively charged NPs label the outer surface of the polyamide film (expected to be carboxylate-rich), while negatively charged particles are uniformly distributed within the layer. Diafiltration measurements quantify the transient kinetics of NP retention and permeation. Overall, our results establish the flow activity of the polyamide nodular surface and provide estimates for the dimensions of permeation pathways.
AU  - Li,Y
AU  - Klosowski,MM
AU  - McGilvery,CM
AU  - Porter,AE
AU  - Livingston,AG
AU  - Cabral,JT
DO  - 10.1016/j.memsci.2017.04.005
EP  - 17
PY  - 2017///
SN  - 0376-7388
SP  - 9
TI  - Probing flow activity in polyamide layer of reverse osmosis membrane with nanoparticle tracers
T2  - JOURNAL OF MEMBRANE SCIENCE
UR  - http://dx.doi.org/10.1016/j.memsci.2017.04.005
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000401124400002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/51713
VL  - 534
ER  -
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