Occurrence of drug target residues within decantation tank sediments: a good clue to assess their historical excretion? - BRGM - Bureau de recherches géologiques et minières Accéder directement au contenu
Article Dans Une Revue Sustainable Environment Research Année : 2021

Occurrence of drug target residues within decantation tank sediments: a good clue to assess their historical excretion?

Résumé

Abstract This study investigated the potential of sediments accumulated in sewer systems to record human activities through the occurrence of drug target residues (DTR). The installation studied is 17 m deep underground decantation tank that traps the coarse fractions of a unitary sewer system (northern part of Orléans, France), collecting both stormwater and wastewater. The sediments deposited in this tank could constitute a nonesuch opportunity to study the historical evolution of illicit and licit drug consumption in the catchment, however, the deposition processes and the record of DTRs remain largely unknown at present. Five cores were acquired from 2015 to 2017. One hundred fifty-two sediment samples were extracted using a mixture of ultra-pure water:methanol (1:1) prior to analysis of the extracts by high-pressure liquid chromatography coupled to tandem mass spectrometry. Several classical sedimentological analyses such as total organic carbon, facies description and granulometry were also performed on these samples, in order to understand the most important factors (e.g., physico-chemical properties of the DTRs, solid type, assumed load in wastewater) impacting their deposition. The key role of the speciation of DTRs was highlighted by the higher contents in neutral and anionic DTRs in organic layers, whereas only cationic DTRs were found in mineral layers. The considerable modifications in the sediments’ properties, generated by distinct origins (i.e., stormwater or wastewater), are therefore the most important drivers that must be taken into account when back-calculating the historical patterns of drug consumption from their DTR concentrations in decantation tank sediments. Further research remains necessary to fully understand the deposition process, but this study provides new clues explaining these temporal evolutions.
Fichier principal
Vignette du fichier
s42834-021-00092-w.pdf (1.54 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03214186 , version 1 (30-04-2021)

Licence

Paternité

Identifiants

Citer

Thomas Thiebault, Laëtitia Fougère, Anaëlle Simonneau, Emilie Destandau, Claude Le Milbeau, et al.. Occurrence of drug target residues within decantation tank sediments: a good clue to assess their historical excretion?. Sustainable Environment Research, 2021, 31 (18), ⟨10.1186/s42834-021-00092-w⟩. ⟨hal-03214186⟩
162 Consultations
44 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More