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Pré-Publication, Document De Travail Année : 2023

Insights on impact estimation of unmeasured micropollutants from WWTP release

Résumé

During wastewater treatment, incomplete elimination of micropollutants occurs. These micropollutants are often incompletely eliminated and may pose a risk to human health and aquatic ecosystems. The potential impacts of these substances are underestimated due to the lack of available concentrations below the limit of quantifications (LOQ) for an important set of micropollutants. Here, we studied the potential impacts on human health and aquatic environment of the release of 261 organic micropollutants at the scale of France and we showed that, even with a concentration below the LOQ, some micropollutants could have a significant impact. For the unmeasured concentrations, a global concentration distribution built on several datasets with different LOQ is used. Ignoring the unmeasured micropollutants led to an underestimation of the impacts of more than 300% on both human health and aquatic environment. Some substances, such as hydrazine, endrin, or 2,3,7,8-TetraCDD, could lead to a very high impact even with an unmeasured concentration. The usual convention of LOQ/2 for the unmeasured concentrations is also shown to be an overestimation. This work can be adapted to any other compartment and any other geographical context.
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Dates et versions

hal-03952680 , version 1 (23-01-2023)
hal-03952680 , version 2 (04-04-2023)
hal-03952680 , version 3 (21-08-2023)

Licence

Paternité - Pas d'utilisation commerciale - Partage selon les Conditions Initiales

Identifiants

  • HAL Id : hal-03952680 , version 2

Citer

Rémi Servien, Kevin Bonnot, Eric Latrille, Arnaud Hélias, Dominique Patureau. Insights on impact estimation of unmeasured micropollutants from WWTP release. 2023. ⟨hal-03952680v2⟩
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