Imperial College London
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Emeritus ProfessorNigelGraham

Faculty of Engineering, Department of Civil and Environmental Engineering

Senior Research Investigator
 
 
 
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Contact

 

n.graham Website

 
 
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Assistant

 

Miss Judith Barritt +44 (0)20 7594 5967

 
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Location

 

406Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Su:2020:10.1016/j.scitotenv.2019.135051,
author = {Su, Z and Liu, T and Li, X and Graham, NJD and Yu, W},
doi = {10.1016/j.scitotenv.2019.135051},
journal = {Science of the Total Environment},
title = {Tracking metal ion-induced organic membrane fouling in nanofiltration by adopting spectroscopic methods: observations and predictions},
url = {http://dx.doi.org/10.1016/j.scitotenv.2019.135051},
volume = {708},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Natural organic matter (NOM) with the size approaching to membrane pore size is commonly considered as the crucial component leading to severe pore blocking and superfluous energy consumption. Aquatic metal ions coexisting with this NOM constituent (target NOM) exert a significant influence on membrane filtration performance; however, little work elucidated their interactions and the impacts on nanofiltration (NF). Therefore, we systematically investigated this issue by titrating three environmentally-relevant metal ions (Al3+, Fe3+ and Cu2+) into the target NOM sample obtained by pre-filtering using NF membrane. Fast spectrophotometric techniques were employed to observe the interactive performance. Results suggested that all metal ions at their critical concentrations caused severe flux decline; Cu2+ at a very low concentration of 5μM, Al3+ and Fe3+ at 20μM. NF performance recovered when the concentrations were beyond their critical values, and was improved at excessive concentration when flocs formed. Relationship between spectroscopic characteristics and NF performance was particularly addressed. UV–vis spectrum can be expected to be useful and predictive in membrane fouling control when Al3+ or Fe3+ presented. However, fluorescence fingerprint was not likely that effective since fluorescence intensity continuously reduced with the increasing metal ion concentration, attributed to their quenching effect on NOM fluorophores.
AU  - Su,Z
AU  - Liu,T
AU  - Li,X
AU  - Graham,NJD
AU  - Yu,W
DO  - 10.1016/j.scitotenv.2019.135051
PY  - 2020///
SN  - 0048-9697
TI  - Tracking metal ion-induced organic membrane fouling in nanofiltration by adopting spectroscopic methods: observations and predictions
T2  - Science of the Total Environment
UR  - http://dx.doi.org/10.1016/j.scitotenv.2019.135051
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000506214900093&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/76187
VL  - 708
ER  -
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