Chlorinated solvents source identification by nonlinear optimization method

Valeureux Illy (1) , Gregory Cohen (1) , Elicia Verardo (1) , Patrick Höhener (2) , Nathalie Guiserix (3) , Olivier Atteia (1)

1 ENSEGID - Géoressources & Environnement
2 LCE - Laboratoire Chimie de l'environnement
3 RENAULT

In this work, chloride ions were used as conservative tracers and supplemented with conservative amounts of chloroethenes (PCE, TCE, Cis-DCE, 1,1-DCE), chloroethanes (1,1,1-TCA, 1,1-DCA), and the carbon isotope ratios of certain compounds, the most representative on the sites studied, which is a novelty compared to the optimization methods developed in the scientific literature so far. A location of the potential missing sources is then proposed in view of the balances of the calculated mixing fractions. A test of the influence of measurement errors on the results shows that the uncertainties in the calculation of the mixture fractions are less than 11%, indicating that the source identification method developed is a robust tool for identifying sources of chlorinated solvents in groundwater.

Domaines: Sciences de l'environnement

Valeureux Illy, Gregory Cohen, Elicia Verardo, Patrick Höhener, Nathalie Guiserix, et al.. Chlorinated solvents source identification by nonlinear optimization method. Environmental Monitoring and Assessment, 2023, 195 (4), pp.531. ⟨10.1007/s10661-023-11107-x⟩. ⟨hal-04071563⟩