Understanding Polycyclic Aromatic Hydrocarbon transfers at the catchment scale combining chemical and fallout radionuclides analyses

Autor: Gateuille, D., Olivier Evrard, Lefevre, I., Moreau-Guigon, E., Alliot, F., Chevreuil, M., Mouchel, J. -M
Přispěvatelé: Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Géochimie Des Impacts (GEDI), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Structure et fonctionnement des systèmes hydriques continentaux (SISYPHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Mines Paris - PSL (École nationale supérieure des mines de Paris), Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Evrard, Olivier, Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Université Pierre et Marie Curie - Paris 6 (UPMC)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-MINES ParisTech - École nationale supérieure des mines de Paris, Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Research in the upstream catchments was conducted in the framework of the PIREN Seine and GIS ORACLE long-term environmental monitoring and research programmes., Funding from the R2DS programme (Ile-de-France Region).
Jazyk: angličtina
Rok vydání: 2013
Předmět:
[SDE] Environmental Sciences
environmental contamination
[SDU.STU.GM] Sciences of the Universe [physics]/Earth Sciences/Geomorphology
[CHIM.ORGA]Chemical Sciences/Organic chemistry
pollutant transfers
[SDE.MCG]Environmental Sciences/Global Changes
[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study
[CHIM.ORGA] Chemical Sciences/Organic chemistry
[SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces
environment
[SDE.MCG] Environmental Sciences/Global Changes
polycyclic aromatic hydrocarbons (PAHs)
[SDE]Environmental Sciences
[SDU.STU.HY] Sciences of the Universe [physics]/Earth Sciences/Hydrology
fallout radionuclides
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology
[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology
[SDV.SA.SDS] Life Sciences [q-bio]/Agricultural sciences/Soil study
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces
environment
catchment scale
Zdroj: EGU General Assembly 2013
EGU General Assembly 2013, Apr 2013, Vienne, Austria. pp.EGU2013-2928-1
Scopus-Elsevier
Erosion and Sediment Yields in the Changing Environment (Proceedings of a symposium held at the Institute of Mountain Hazards and Environment,CAS-Chengdu, China, 11–15 October 2012)
Erosion and Sediment Yields in the Changing Environment (Proceedings of a symposium held at the Institute of Mountain Hazards and Environment,CAS-Chengdu, China, 11–15 October 2012), IAHS Publ. 356, 2012
Popis: International audience; Contamination of river water and sediment constitutes a major environmental issue for industrialized countries. Polycyclic Aromatic Hydrocarbons (PAHs) are a group of persistent organic pollutants characterized by two or more fused rings. In recent years, studies dealing with PAHs have grown in number. Some PAHs present indeed a high risk for environment and human health because of their carcinogenic and mutagenic properties. However, most of these studies focused on measuring PAH concentration in the different compartments of the environment (air, soil, sediment, water, etc.) In this context, there remains a lack of understanding regarding the various processes responsible for PAH transfers from one environmental compartment to another. Our study aims to quantify PAHs transfers at the catchment scale by combining chemical analysis with gamma spectrometry. Air, soil, river water and sediment samples (n=820) were collected in two upstream sub-catchments of the Seine River basin (France) during one year. Chemical analyses were carried out to determine PAHs concentrations in all samples. Furthermore, measurement of fallout radionuclides (Beryllium-7, Lead-210, Caesium-137) in both rainfall and river sediment provided a way to discriminate between freshly eroded sediment vs. resuspension of older material that previously deposited on the riverbed. This information is crucial to estimate PAH residence time and transfer velocities in the Seine River basin. The results show that the PAH behaviour varies from one subcatchment to the next. PAH transfers depend indeed on both the characteristics of the catchment (e.g. topography, presence of drained cropland in catchments) and the local anthropogenic pressures. A significant increase in atmospheric deposition of PAHs is observed during winter due to a larger number of sources (household heating). The 14-month study has also highlighted the seasonal variations of PAH fluxes, which are mainly related to the hydrological regimes (i.e. low flow vs. flood periods). The behaviour of the PAHs mainly depends on their molecular mass. The lightest ones tend to quickly migrate to rivers whereas the heaviest slowly accumulate in soils throughout the low-flow period. Then, an increase in PAH export associated with sediment is observed during the winter floods, when rivers are heavily loaded with suspended matter. The downstream exports of PAHs are controlled by the main erosion processes that occurred in the catchments. Results show that PAH fluxes are more important when material is mostly supplied to rivers by soil surface erosion processes than when they are delivered by gully or riverbank erosion. Despite the reduction in PAH emissions since the 1960s, there is still a significant storage of PAHs in the upstream part of the Seine River basin. In this context, WFD objectives are unlikely to be reached by 2015.
Databáze: OpenAIRE
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