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Prognose des Schadstoffaustrags aus mehrphasigen DNAPL-Pools mittels semi-analytischem Berechnungsmodell
Citation Link: https://doi.org/10.15480/882.3762
Other Titles
Prediction ofmass discharge frommulticomponent DNAPL pools using a semi-analyticalmodel
Publikationstyp
Journal Article
Date Issued
2021-06-17
Sprache
German
Author(s)
TORE-DOI
Journal
Volume
26
Issue
3
Start Page
241
End Page
253
Citation
Grundwasser 26 (3): 241-253 (2021-09)
Publisher DOI
Scopus ID
Publisher
Springer
Multicomponent DNAPL pools are among the most common reasons for groundwater contamination and represent highly persistent source areas. Although several studies have already shown that their constituents influence each other’s solubility, existing models neglect these interactions. For this reason, a semi-analytical model has been developed, considering the pool composition as temporally variable. Based on Raoult’s law, the molar fraction, the effective solubility and finally the mass discharge due to advection, dispersion and diffusion of each component are determined. The results significantly differ from studies on single-phase pools. It is shown that mass discharges can both increase and decrease over time and that the longevity of DNAPL pools as well as the time until threshold values are fullfilled will be significantly underestimated if Raoult’s law is neglected. Additionally, a sensitivity analysis reveals that poorly soluble minor components must not be neglected, whereas highly soluble ones can.
Subjects
Grundwasserkontamination
Langlebigkeit
Raoult’sches Gesetz
Matrixdiffusion
Nebenbestandteile
Contamination
Source longevity
Raoult’s law
Matrix diffusion
Minor components
DDC Class
550: Geowissenschaften
570: Biowissenschaften, Biologie
600: Technik
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