Benoît Pernet-Coudrier

Benoît Pernet-Coudrier
Université de Bretagne Occidentale | UBO · Institut Universitaire Européen de la Mer (IUEM)

PhD

About

33
Publications
5,276
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Introduction
My interests are directed at the fate, transformation and interactions of organic matter in natural and human-impacted aquatic systems.
Additional affiliations
April 2009 - July 2011
Eawag: Das Wasserforschungs-Institut des ETH-Bereichs
Position
  • PostDoc Position
September 2008 - March 2009
University of Paris-Est
Position
  • ATER
October 2005 - August 2008
University of Paris-Est
Position
  • PhD

Publications

Publications (33)
Article
Twenty percent of the water run-off from China’s land surface drains into the Yangtze River and carries the sewage of approximately 400 million people out to sea. The lower stretch of the Yangtze therefore offers the opportunity to assess the pollutant discharge of a huge population. To establish a comprehensive assessment of micropollutants, river...
Article
Although widely studied for their chem. structures and properties (e.g., metal complexation, growth stimulation of planktonic species), humic substances (HS) have been very poorly quantified in fluvial and estuarine waters. In this monthly basis study, we detd. HS concns. (by Adsorptive Square Wave Cathodic Stripping Voltammetry) along the entire r...
Article
Full-text available
Deep-sea hydrothermal venting is now recognized as a major source of iron (Fe), an essential trace element that controls marine productivity. However the reactions occurring during dispersal from buoyant plumes to neutrally-buoyant hydrothermal plumes are still poorly constrained. Here we report for the first time on the dissolved-particulate parti...
Article
Fulvic acids and two dissolved reduced sulphur substances (RSS) were analysed for one year along the whole salinity gradient in the Aulne estuary (north-western France) using differential pulse cathodic stripping voltammetry. Concentrations of glutathione-like (GSH-like), thioacetamide-like (TA-like) and fulvic acid-like (FA-like) compounds ranged...
Article
Rationale: Understanding the fate of metals in agricultural land is an important issue for agronomic sustainability. This study aimed at quantifying the export/retention of metals in a temperate watershed subject to important manuring activities. Methods: The chemical composition of the Penzé stream was examined at high resolution during a 1-year s...
Article
Full-text available
The objective of this study was to assess the impact of the filtration method (in situ vs. ex situ ) on the dissolved/particulate partitioning of 12 elements in hydrothermal samples collected from the Lucky Strike vent field (Mid-Atlantic Ridge; MAR). To do so, dissolved (<0.45 μm) and particulate Mg, Li, Mn, U, V, As, Ba, Fe, Zn, Cd, Pb and Cu wer...
Article
Although reduced organic sulfur substances (RSS) as well as humic substances (HS) are widely suspected to play a role in, for example, metal speciation or used as a model of dissolved organic carbon (DOC) in laboratory studies, reports of their quantification in natural waters are scarce. We have examined the dynamics and sources of reduced sulfur,...
Article
Full-text available
Shahe Reservoir in the headwater of the Wenyu River, Beijing City, was selected for a case study evaluating the effects of both urbanization and agricultural intensification on the cycling of phosphorus (P), as well as Cr, Cu, and Ni. This study showed that the construction of the reservoir in 1960 resulted in an increased retention of P, Cr, Cu, a...
Article
Full-text available
La matière organique dissoute [MaO) joue un rôle important dans la spéciation et la biodisponibilité des métaux traces. Cependant aucune information n'est actuellement disponible quant à l'influence des Mao issues du rejet de station d'épuration sur la biodisponibilité du cuivre. Une procédure d'extraction et de fractionnement de la MOD sur résines...
Article
Full-text available
Ce doctorat s'intègre dans le projet ANR BIOMET (JC05_59809) et a eu pour vocation d'améliorer les connaissances actuelles sur l'influence de la matière organique dissoute sur la spéciation et la biodisponibilité des métaux particulièrement dans le cas de système sous forte pression urbaine tel que la Seine. La compréhension de l'influence de la MO...
Article
Full-text available
In this study, surface water samples from the Wenyu River and the North Canal, effluent from major wastewater treatment plants (WWTPs) in Beijing, and wastewater from open sewers that discharge directly into the river system were collected and analyzed for 16 priority USEPA polycyclic aromatic hydrocarbons (PAHs). Concentrations of these 16 PAHs ra...
Article
Full-text available
The Haihe River System (HRS) drains the Chinese megacities Beijing and Tianjin, forming a large-scale irrigation system severely impacted by wastewater-borne pollution. The origin, temporal magnitudes, and annual mass fluxes of a wide range of pharmaceuticals, household chemicals, and pesticides were investigated in the HRS, which drains 70% of the...
Article
Full-text available
1] The Yangtze is the largest river in Asia and its water composition reflects the activities of about 400 Mio people in its catchment. Its chemical loads have a large impact on the biogeochemistry of the East China Sea. We discuss and quantify the annual dynamics of major ions, nutrients, and trace elements from samples collected monthly at Datong...
Article
Semiarid regions worldwide are particularly prone to eutrophication, which causes immense ecological and economic problems. One region that is in transition and requires systematic research for effective intervention is the dry landscape of Beijing-Tianjin (P. R. China). We investigated the sources and spatiotemporal loads of nitrogen and phosphoru...
Article
Dissolved organic matter (DOM) samples were obtained from a low-density urbanized area located upstream of Paris (along the Marne River, France) and from the treated effluents at the Paris main wastewater treatment plant. These samples were then fractionated according to their hydrophobicity. DOM fractions consisted of nanomolar to sub-micromolar f...
Article
Full-text available
Understanding the nature of organic matter is a necessary first step in assessing contaminant bioavailability and allowing water supply managers to optimise the treatment train in the aim of providing safe and inexpensive drinking water. This study provides further insight into the composition, structure and functional groups of dissolved organic m...
Article
Dissolved organic matter (DOM) from the treated effluent of a wastewater treatment plant and from the river Seine under high human pressure has been separated into three fractions: hydrophobic (containing humic and fulvic substances), transphilic and hydrophilic using a two column array of XAD-8 and XAD-4 resins. The acid base properties and the bi...
Presentation
Full-text available
Bioavailability of trace metals for aquatic organisms in the dissolved compartment of water is usually interpreted with the Free Ion Activity Model (FIAM) and its extension, the Biotic Ligand Model (BLM). Under fame generally hypothesis, the FIAM states that the biological response to a metal exposure is proportional to the activity of the free-ion...
Article
A combination of reverse osmosis (RO) concentration and DAX-8/XAD-4 resin adsorption techniques is used to isolate the various constituents of urban dissolved organic matter (DOM) from inorganic salts. Three fractions: hydrophobic (HPO), transphilic (TPI) and hydrophilic (HPI) accounting respectively for 35%, 20% and 45% of extracted carbon, are is...
Article
An electrochemical method based on adsorptive stripping chronopotentiometry (SCP) with a rotating mercury film electrode has been developed for the determination of dissolved iron (III) at subnanomolar concentrations in estuarine and coastal waters. The detection limit was 0.11 nM after adsorption time of 60s. Compared to the other chronopotentiome...
Article
Full-text available
A combination of reverse osmosis (RO) concentration and DAX-8/XAD-4 resin adsorption techniques is used to isolate the various constituents of urban dissolved organic matter (DOM) from inorganic salts. Three fractions: hydrophobic (HPO), transphilic (TPI) and hydrophilic (HPI) accounting respectively for 35%, 20% and 45% of extracted carbon, are is...
Article
Full-text available
An adsorptive stripping chronopotentiometric (SCP) method has been developed for quantification of dissolved iron in estuarine and coastal waters. After UV-digestion of filtered samples the Fe(III) ions in non-deoxygenated samples were complexed with solochrom violet RS (SVRS). The complexes were then accumulated by adsorption on the surface of a m...

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