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| Titel |
Dying to find the source – the use of rhodamine WT as a proxy for soluble point source pollutants in closed pipe surface drainage networks |
| VerfasserIn |
C. H. Mines, A. Ghadouani, G. N. Ivey |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 13, no. 11 ; Nr. 13, no. 11 (2009-11-12), S.2169-2178 |
| Datensatznummer |
250012055
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| Publikation (Nr.) |
 copernicus.org/hess-13-2169-2009.pdf |
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| Zusammenfassung |
| Rhodamine WT (RWT), a xanthene dye, may serve as a proxy for soluble
pollutants within quantitative tracing studies investigating point source
contaminant transport. This study quantified the effects of altering the
concentration, pH, temperature and salinity of a RWT solution on the
detected fluorescence of RWT within the laboratory prior to a field release
of RWT within a closed pipe urban drainage network. All RWT solutions
exhibited stability and <10% variation from the expected concentration
over a thirteen hour laboratory study period; pH related quenching of RWT
fluorescence of up to 14.9% was observed for solutions with pH<3.9;
and increasing salinity of RWT solution was found to have a negligible
quenching effect. In direct contrast to previous studies RWT fluorescence
was found to directly correlate with temperature of solution, and a
temperature correction factor was determined and tested. The field release
study succeeded in detecting RWT at concentrations two orders of magnitude
greater than background fluorescence. Based on longitudinal dispersion
theory, observed RWT peak concentrations were within 10% of predicted
peaks. |
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