Wastewater Colloidal Organic Carbon: Characterization of Filtration Fractions Using 1 H NMR

The current study separates colloidal organic carbon (COC) of municipal wastewater using membrane and ultrafiltration filters followed by characterization using 1 H nuclear magnetic resonance (NMR) and UV absorbance with the goal of determination of size‐specific characteristics, which may be used t...

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Bibliographic Details
Published in:Water environment research 2016-04, Vol.88 (4), p.308-317
Main Authors: McPhedran, Kerry N., Seth, Rajesh
Format: Article
Language:English
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Summary:The current study separates colloidal organic carbon (COC) of municipal wastewater using membrane and ultrafiltration filters followed by characterization using 1 H nuclear magnetic resonance (NMR) and UV absorbance with the goal of determination of size‐specific characteristics, which may be used to correlate contaminant partitioning to natural COC. Passing fractions included 49.7, 44.8, 39.3, and 33.1 mg/L COC for filter sizes 1.5 μm, 0.45 μm, 100 kDa, and 1 kDa, respectively. The methodology used for processing COC prior to 1 H NMR characterization was novel and successful in concentrating COC without modification of structures, which is the general drawback of other separation techniques such as resin extractions. This concentration technique is quite simple (i.e., not dependent on specialized instrumentation) and allows much shorter NMR experimental durations saving time and cost of analysis. Further work using NMR techniques will allow for greater understanding of COC molecular characteristics and be valuable for use in predictive modeling improvements.
ISSN:1061-4303
1554-7531
DOI:10.2175/106143016X14504669767931