Baran, Nicole

David, Julien

Petelet Giraud, Emmanuelle

SOULIER, Coralie

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Geophysical Research Abstracts
Vol. 20, EGU2018-9952, 2018
EGU General Assembly 2018
© Author(s) 2018. CC Attribution 4.0 license.
Micropollutants and boron isotopes as tracers of the presence of domestic
wastewater effluents in surface and groundwaters
Emmanuelle Petelet-Giraud (1), Nicole Baran (1), Coralie Soulier (1), and Julien David (2)
(1) BRGM, Laboratories Division - LAB/ISO, Orléans, France (e.petelet@brgm.fr), (2) Geo-Hyd (Antea Group), 101 Rue
Jacques Charles, 45160 Olivet, France
The origins of contamination of water resources are often multiple, including for a single chemical element or
molecule. For instance, AMPA in both surface and groundwater can originate from agricultural practices as a
degradation product of Glyphosate, but also from wastewater effluents as a degradation product of phosphonates.
The discrimination of the origins and vectors of contamination in the environment is both an environmental and
societal issue in order to define an integrated water resources management at the catchment or water body scale by
implementing appropriate measures to effectively struggle against pollution.
The objective of this study is to define a methodology for the identification of a "domestic wastewater" contamina-
tion within surface waters and groundwater. As there is no ideal tracer, i.e. conservative, persistent in the different
water compartments, present in quantity above the detection limit and originating from a single type of pollution
source, we propose a multi-tracer approach (chemical and isotopic) to identify and validate the relevance of fore-
seen tracers, in order to overcome this limitation.
Among the relevant tracers of wastewater, the following may be used for their intrinsic or combined discrimi-
nant power: 1) organic effluent tracers: nitrogen contents and isotopic ratios of nitrogen and oxygen of nitrates; 2)
tracer of detergents: boron contents and boron isotopes; 3) pharmaceuticals tracers: e.g. carbamazepine, ibuprofen,
paracetamol, gadolinium anomaly; 4) life-style tracers: e.g. caffeine. The originality of the study relies on small
capacities wastewater treatment plants without tertiary treatment process.
Results from different sampling campaigns on a catchment impacted both by diffuse agricultural pollution and
punctual wastewater inputs are presented. Investigations concern wastewater effluents resulting from different type
of treatment plants, surface and groundwater. Potential combination of suitable tracers is discussed combining
micropollutants and isotopic signatures.


Micropollutants and boron isotopes as tracers of the presence of domestic wastewater effluents in surface and groundwaters

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Micropollutants and boron isotopes as tracers of the presence of domestic wastewater effluents in surface and groundwaters

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