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dc.contributor.author
Chon, Kangmin
dc.contributor.author
Lee, Yunho
dc.contributor.author
Traber, Jacqueline
dc.contributor.author
von Gunten, Urs
dc.date.accessioned
2020-07-09T06:53:50Z
dc.date.available
2017-06-10T20:39:50Z
dc.date.available
2020-07-09T06:53:50Z
dc.date.issued
2013-09-15
dc.identifier.issn
0043-1354
dc.identifier.issn
1879-2448
dc.identifier.other
10.1016/j.watres.2013.06.019
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/70999
dc.description.abstract
Dissolved organic nitrogen (DON) can act as a precursor of nitrogenous disinfection byproducts during oxidative water treatment. Quantification and characterization of DON are still challenging for waters with high concentrations of dissolved inorganic nitrogen (DIN, including ammonia, nitrate and nitrite) relative to total dissolved nitrogen (TDN) due to the cumulative analytical errors of independently measured nitrogen species (i.e., DON=TDN-NO2--NO3--NH4+/NH3) and interference of DIN species to TDN quantification. In this study, a novel electrodialysis (ED)-based treatment for selective DIN removal was developed and optimized with respect to type of ion-exchange membrane, sample pH, and ED duration. The optimized ED method was then coupled with size-exclusion chromatography with organic carbon, UV, and nitrogen detection (SEC-OCD-ND) for advanced DON analysis in wastewater effluents. Among the tested ion-exchange membranes, the PC-AR anion- and CMT cation-exchange membranes showed the lowest DOC loss (1-7%) during ED treatment of a wastewater effluent at ambient pH (8.0). A good correlation was found between the decrease of the DIN/TDN ratio and conductivity. Therefore, conductivity has been adopted as a convenient way to determine the optimal duration of the ED treatment. In the pH range of 7.0-8.3, ED treatment of various wastewater effluents with the PC-AR/CMT membranes showed that the relative residual conductivity could be reduced to less than 0.50 (DIN removal >90%; DIN/TDN ratio ≤0.60) with lower DOC losses (6%) than the previous dialysis and nanofiltration methods (DOCloss >10%). In addition, the ED method is shorter (0.5h) than the previous methods (>1-24h). The relative residual conductivity was further reduced to ~0.20 (DIN removal >95%; DIN/TDN ratio≤0.35) by increasing the ED duration to 0.7h (DOC loss=8%) for analysis by SEC-OCD-ND, which provided new information on distribution and ratio of organic carbon and nitrogen in different molecular weight fractions of effluent organic matter. © 2013 Elsevier Ltd.
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.subject
Ammonium
en_US
dc.subject
Cation-exchange
en_US
dc.subject
Dissolved organic nitrogen
en_US
dc.subject
Electrodialysis
en_US
dc.subject
Ion-exchange membrane
en_US
dc.subject
Nitrate; Nitrite
en_US
dc.title
Quantification and characterization of dissolved organic nitrogen in wastewater effluents by electrodialysis treatment followed by size-exclusion chromatography with nitrogen detection
en_US
dc.type
Journal Article
dc.date.published
2013-06-20
ethz.journal.title
Water Research
ethz.journal.volume
47
en_US
ethz.journal.issue
14
en_US
ethz.journal.abbreviated
Water Res.
ethz.pages.start
5381
en_US
ethz.pages.end
5391
en_US
ethz.identifier.scopus
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-06-10T20:41:03Z
ethz.source
ECIT
ethz.identifier.importid
imp593650ed2883335614
ethz.ecitpid
pub:112456
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2017-07-17T08:35:25Z
ethz.rosetta.lastUpdated
2024-02-02T11:23:27Z
ethz.rosetta.versionExported
true
ethz.COinS
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