Assessing and predicting the changes for inorganic mercury and methylmercury concentrations in surface waters of a tidal estuary (Adour Estuary, SW France)
| Type | Article | ||||||||||||||||||||||||||||
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| Date | 2023-01 | ||||||||||||||||||||||||||||
| Language | English | ||||||||||||||||||||||||||||
| Author(s) | Stoichev Teodor1, Thibaut De Chanvalon Aubin2, Veloso Sandrine2, Deborde Jonathan 2, 3, Tessier Emmanuel2, Lanceleur Laurent2, Amouroux David2 |
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| Affiliation(s) | 1 : Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixoes, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal 2 : Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM, Institut des Sciences Analytiques et de Physico-chimie pour l'Environnement et les matériaux, Pau, France 3 : Ifremer, LITTORAL, Laboratoire Environnement Ressources des Pertuis Charentais, F-17390 La Tremblade, France |
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| Source | Marine Pollution Bulletin (0025-326X) (Elsevier BV), 2023-01 , Vol. 186 , P. 114400 (12p.) | ||||||||||||||||||||||||||||
| DOI | 10.1016/j.marpolbul.2022.114400 | ||||||||||||||||||||||||||||
| WOS© Times Cited | 5 | ||||||||||||||||||||||||||||
| Keyword(s) | Effect separation, Contaminant transport, Pollution sources, Analysis of covariance, Mercury speciation, Water | ||||||||||||||||||||||||||||
| Abstract | Total and dissolved concentrations of inorganic mercury (IHg) and methylmercury (MeHg) in water (Adour Estuary) were determined during three sampling campaigns and related to biogeochemical variables (nutrients, organic matter). Factors (sampling time, sample type) were included in analysis of covariance with effect separation. The urban estuary suffered historically from anthropogenic sources, however, decreased emissions have reduced Hg concentrations. Total IHg (0.51–3.42 ng L−1) and MeHg (25–81 pg L−1) concentrations are additively described by suspended particulate matter and particulate organic carbon. Higher total concentrations, carried by organic-rich particles, were found near specific discharge points (0.79–8.02 ng L−1 and 34–235 pg L−1 for IHg and MeHg, respectively). The associated high dissolved MeHg concentrations could not be explained only by biogeochemical variables. Better efficiency of the models is found for total than for dissolved concentrations. Models should be checked with other contaminants or with estuaries, suffering from downstream contamination. |
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