PRXICD35
type: UserItem
resource: Biocidal substances in the Seine River: contribution from urban sources in the Paris megacity
access date: 2022-11-23 15:23:35
repository: pubs.rsc.org

Biocidal substances in the Seine River: contribution from urban sources in the Paris megacity
type: AcademicArticle
abstract: This work addresses river contamination by biocidal substances up- and downstream a megacity, with the aim of investigating the contribution of urban discharges and proposing effective and concerted mitigation solutions. To this end, ten campaigns were conducted in the two main rivers of the Paris conurbation. Eighteen previously prioritized biocides were all quantified at three sampling locations, and several were found at concentrations that may present a risk to the aquatic ecosystem (dichloroisothiazolinone, diuron, and benzalkonium C12 and C14, with concentrations up to 42, 75, 1700, and 150 ng L−1, respectively). The collected data enabled the assessment of daily mass loads of biocides (from <1 g per day to several tens of kg per day, the highest values observed being for benzalkonium C12 and C14) which were put into perspective with previously characterized loads from major urban sources. A shift in the distribution of biocide loads between up- and downstream the Paris conurbation was observed for several molecules (benzisothiazolinone, terbutryn, and thiabendazole, the median load of which increased by a factor of 1.5 to 3), thus suggesting the contribution of urban discharges to the contamination of receiving waters by biocides. Analysing the long-term dynamics of biocides in the Seine River showed that even if the ban of several molecules as pesticides did have a noticeable impact on surface water contamination, a background pollution remained (3 < diuron < 75 ng L−1; 0.1 < isoproturon < 5.7 ng L−1), which may be related to urban inputs. Our results offer prospects for specific mitigation solutions at three scales: emissions, transport in the sewer system and treatment before discharge.
pages: 2358-2372
doi: 10.1039/D2EW00253A
short title: Biocidal substances in the Seine River
language: en
creator: Person
author list: Person
is part of: Issue
  date: 2022-10-03
  volume: 8
  issue: 10
  is part of: Environmental Science: Water Research & Technology
    type: Journal
    publisher: The Royal Society of Chemistry
    short title: Environ. Sci.: Water Res. Technol.
    issn: 2053-1419

Person
given name: Claudia
surname: Paijens

Person
given name: Damien
surname: Tedoldi

Person
given name: Bertrand
surname: Frère

Person
given name: Romain
surname: Mailler

Person
given name: Vincent
surname: Rocher

Person
given name: Régis
surname: Moilleron

Person
given name: Adèle
surname: Bressy