Véronique Lenoble

Véronique Lenoble
Université de Toulon | USTV · M.I.O. laboratory

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75
Publications
14,754
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2,397
Citations
Citations since 2016
32 Research Items
1465 Citations
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250

Publications

Publications (75)
Article
Cadmium (Cd) is a highly toxic metal, regularly monitored uniformly for water quality across Europe, but scarcely for sediments. This study was designed to compare the kinetics of Cd remobilization and the amplitude of its transfers with different marine sediments. The results showed a highly reproducible transfer kinetics. Dissolved Cd was strongl...
Article
Microplastics (MPs; <5 mm) are a macro issue recognised worldwide as a threat to biodiversity and ecosystems. Widely distributed in marine ecosystems, MPs have already been found in the deep-sea environment. However, there is little information on ecological mechanisms driving MP uptake by deep-sea species. For the first time, this study generates...
Article
New fluorescent ion-imprinted polymers (IIPs) specific for Pb(II) detection were synthesized by precipitation polymerization. The fluorescent activity of the IIPs was provided by a fluorescent functional monomer, ANQ-ST, based on the chelating 5-amino-8-hydroxyquinoline moiety coupled to anthracene and a styrenic group. Various synthesis parameters...
Article
Microplastics are a relevant environmental concern in marine ecosystems due to their ubiquity. However, knowledge on their dispersion patterns within the ocean basin and the interaction with biota are scarce and mostly limited to surface waters. This study investigated microplastic contamination in two species of deep-sea cephalopods from the south...
Article
The adsorption of trace metals on microplastics (MPs) is affected by the presence of surficial biofilms but their interactions are poorly understood. Here, we present the influence of Cu levels in real seawater (Toulon Bay, NW Mediterranean Sea) on microbial communities and Cu content of the resulting biofilms grown during incubation experiments on...
Article
Marine ecosystems are reported to be contaminated by microplastics (MPs) (< 5 mm); however, the ecological mechanisms involved in the ingestion of debris by marine organisms are relatively unknown. By developing and optimising an appropriate protocol of gut digestion for fish species, this study explores a tropical estuarine environment to unriddle...
Article
Marine sediments are a sink for trace metals but also a potential source during sediment resuspension events. Understanding the factor that regulates this uptake or release of contaminant is of prime importance. While the impact of abiotic processes has been widely studied, the quantitative influence of microbial activities on metal cycling during...
Article
Full-text available
The Mediterranean Sea is one of the most impacted basins in terms of microplastics pollution. Land-based activities are the major sources of plastic litter to the ocean, with harbors probably representing significant hotspots. In the framework of the SPlasH! project (Stop alle Plastiche in H2O, Interreg Marittimo project), microplastics were sample...
Preprint
Full-text available
The Mediterranean Sea is one of the most impacted basin in terms of microplastics pollution. Land-based activities are the major sources of plastic litter to the ocean, with harbors probably representing significant hotspots. In the framework of the SPlasH! project (Stop alle Plastiche in H2O, Interreg Marittimo project), microplastics were sampled...
Article
A Moroccan bentonite was activated by sodium carbonate (Na-Be), and by a combined chemical and thermal activation (Na-Be450). The materials characterization was performed by XRD, EDS, FTIR, SEM and porosity measurements. The efficiency of Na-Be and Na-Be450 as low-cost adsorbents to remove nickel and silver from aqueous solution was checked. The La...
Article
In this work, a natural bentonite was submitted to heating treatment (at 550°C and 750°C) in order to correlate such treatment to an improvement of the metal adsorption properties. The characterization of all materials includes XRD, FTIR, TGA, SEM analysis and porosity measurements. The efficiency of raw and calcined bentonite to remove nickel and...
Article
Full-text available
The abundance and distribution of microplastics in estuaries have been barely documented, and generally without accounting for the vertical structure in the water column. This study presents the very first data on the occurrence and distribution of microplastics in the Adour Estuary, SW France. The experimental data set was complemented by numerica...
Article
Full-text available
The article Microplastics in seawater: sampling strategies, laboratory methodologies, and identification techniques applied to port environment.
Article
A new fluorescent Pb(II) imprinted polymer (Pb(II)-IIP) was synthesised for the selective detection of this contaminant in natural water. To play the sensing role, a fluorescent probe specific to Pb(II), based on anthracene coupled to 5-amino-8-hydroxyquinoline and a styrene moiety, was used as a functional monomer. It was associated with ethylene...
Article
Natural diatomite is widely used worldwide as an alternative to synthetic adsorbents and its adsorbing capacity towards nickel and silver ions is assessed in this work. Diatomite was heated up to 550, 750 or 950 °C to modify its physico-chemical and binding properties. A thorough characterization of the resulting material was done by X-ray diffract...
Article
Full-text available
The European Interreg Italy–France 2014–2020 Maritime Project SPlasH! (Stop to Plastics in H2O!) focused on the study of microplastics (MPs) in the marine port environment to evaluate their presence, abundance, and mechanisms of diffusion to the open sea. In the framework of this project, a worldwide review of 74 studies was carried out, providing...
Article
Understanding the potential bioavailability of trace metals (TM) in marine systems is of prime importance to implement adapted regulations and efficiently protect our coastal and estuarine waters. In this study Diffusive Gradients in Thin films (DGT) technique with two different pore size was used to evaluate the potentially bioavailable fractions...
Article
The presence of arsenic in irrigation and drinking waters is a threat to worldwide human health. Dissolved or- ganic matter (DOM) is a ubiquitous and photoreactive sorbent of arsenic, capable of both suppressing and en- hancing its mobility. Microbes can control the mobilization of mineral-bound arsenic, through redox processes thought to occur int...
Article
Sterilization techniques are largely employed to distinguish biotic and abiotic processes in biogeochemical studies as they inhibit microbial activity. Since one century, chemical sterilizers, supposed to preserve original environmental samples, have taken precedence over physical sterilization techniques considered too destructive. Sodium azide (N...
Article
Chromium is a toxic element naturally present in natural waters whose chemical speciation regulates its cycling, mobility and bioavailability. We present here: 1- an improved analytical method for chromium speciation (Cr(VI) vs Cr(III)) in estuarine samples by catalytic adsorptive cathodic stripping voltammetric (cat-AdCSV) and 2- a study highlight...
Article
Full-text available
Contaminated sediments could act as a source of contamination to the surrounding environments by several processes (e.g., diffusive flux, sediment resuspension). This study aimed at highlighting the mechanisms of copper and lead mobilization from resuspended particles to the aqueous phase using laboratory experiments and a kinetic model. Three sedi...
Article
Full-text available
Two new chemosensors for lead (II) were synthesized based on 5-((anthracen-9-ylmethylene) amino)quinolin-10-ol (ANQ). ANQ was modified in the para position of the imine group via a methoxy link either with methylmethacrylate (ANQ-MMA) or styrene (ANQ-ST). Complexation of those molecules with Pb2+ was studied at room temperature using UV-Visible abs...
Article
Full-text available
Nutrient loadings from either point or non-point sources to the environment are related to the growing global population. Subsequent negative impacts of nutrient loading to aquatic environments requires a better understanding of the biogeochemical cycling and better tools to track their sources. This study examines the carbon (C), nitrogen (N) and...
Article
Full-text available
In this study, the object is to prove that isolation of complexes made by varying the metal/ligand ratio (in situ complexation) yields similar polymer characteristics, metal binding and selectivity results as polymers synthesized by isolating the complex by precipitation. Complexation between nickel and the N-(4-vinylbenzyl)-2-(aminomethyl)pyridine...
Article
The aim of this study was to compare the efficiency of siderophore desferrioxamine B (DFOB) and EDTA in increasing the phytoextraction of metals in sunflower. A 28-day pot experiment was conducted in a metal-contaminated soil supplied with 200 μmol kg⁻¹ of DFOB or EDTA. Pore water was collected and pseudo-polarographic analyses were conducted to as...
Article
Sedimentary organic matter (SOM) mineralization is the driving force in diagenesis activity. This biogeochemical process, which controls the mobility of a huge number of elements and especially SOM transformations in surface and deep (down to -50 cm) sediments, was assessed in this study via seasonal monitoring with sediment core sampling in Toulon...
Article
Full-text available
Methylation of mercury (Hg) is the crucial process that controls Hg biomagnification along the aquatic food chains. Aquatic sediments are of particular interest because they constitute an essential reservoir where inorganic divalent Hg (HgII) is methylated. Methylmercury (MeHg) concentrations in sediments mainly result from the balance between meth...
Article
Full-text available
Concentrations of inorganic tin (Sninorg), tributyltin (TBT) and its degradation products dibutyltin (DBT) and monobutyltin (MBT) were measured in surface sediments and in two cores from the Toulon Bay, hosting the major French military harbour. Anticipating planned dredging, the aim of the present work is to map and evaluate for the first time the...
Article
Full-text available
This study aimed at evidencing contaminant inputs from a rapidly growing population and the accompanying anthropogenic activities to river sediments. The Fez metropolitan area and its impacts on the Sebou's sediments (the main Moroccan river) were chosen as a case study. The Fez agglomeration is surrounded by the river Fez, receiving the wastewater...
Article
Full-text available
This study aimed at assessing the physico-chemical characteristics of effluents from some of Fez main activities: tannery factories, textile industry, metal finishing facility and olive oil mills industry. Samples were analyzed for pH, suspended particulate matter (SPM), major ions (Cl, NO 3 , SO 4 , K, Na, Ca and Mg), dissolved organic carbon (DOC...
Article
This study aimed at identifying the extent and type of contamination of a former lead smelting site in the area of Marseille, France, dating from the industrial revolution, and to evaluate environmental hazards and opportunities for phytoremediation, a promising sustainable technology. Amongst the native plants growing in this semiarid shrub ecosys...
Article
Determination of distribution and chemical speciation of arsenic and heavy metals in five acidic springs and in the receiving river near Srebrenica (Bosnia and Herzegovina) was carried out. These waters were used for centuries, and continue to be used, for health-care purposes. The composition and properties of all springs and the river water (afte...
Article
Due to only few experimental evidences, the importance of root-induced alteration of metal dynamic speciation in the rhi-zosphere in the determination of metal bioavailability to plants is still a matter for debate. The present study thus investigated how root-induced changes in pH and dissolved organic matters (DOM) altered copper (Cu) dynamic spe...
Article
This study presents trace elements levels in surface and deep sediments of the Toulon bay (SE France) subjected to anthropogenic inputs (navy base, harbors, etc.). The studied elements (As, Cd, Cr, Cu, Hg, Ni, Pb, Zn) are defined as priority contaminants in aquatic systems. Fifty-five points scattered on the entire bay were sampled, allowing the de...
Article
Arsenic speciation in groundwater and interstitial waters from soil irrigated with As-rich groundwater in Bangladesh was investigated through a size fractionation approach performed in the field and under conditions that allowed the preservation of natural anoxic conditions. Based on a simple chemical characterization, the presence of Fe(II) in the...
Article
The transfer of arsenic to rice grains is a human health issue of growing relevance in regions of southern Asia where shallow groundwater used for irrigation of paddy fields is elevated in As. In the present study, As and Fe concentrations in soil water and in the roots of rice plants, primarily the Fe plaque surrounding the roots, were monitored d...
Article
Different procedures of voltammetric peak intensities determination, as well as various experimental setups were systematically tested on simulated and real experimental data in order to identify critical points in the determination of copper complexation parameters (ligand concentration and conditional stability constant) by anodic stripping volta...
Article
Full-text available
An interaction of dissolved natural organic matter (DNOM) with copper ions in the water column of the stratified Krka River estuary (Croatia) was studied. The experimental methodology was based on the differential pulse anodic stripping voltammetric (DPASV) determination of labile copper species by titrating the sample using increments of copper ad...
Article
A two-step protocol (nano-filtration and reverse osmosis) was applied for natural organic matter (NOM) preconcentration of a seawater sample. Complexing affinities of the so concentrated marine dissolved NOM (DNOM) towards major and trace cations were studied by potentiometric and voltammetric titration techniques. The potentiometric titration expe...
Article
Dans les écosystèmes aquatiques, la matière organique dissoute (MOD) joue un rôle majeur sur le comportement des éléments traces (inorganiques et organiques) et leur biodisponibilité vis-à-vis des micro-organismes, de part ses propriétés de complexation. Bien que la MOD marine représente le principal réservoir organique dans les océans, la caractér...
Article
The influence of an adsorbed layer of the natural organic matter (NOM) on voltammetric behaviour of copper on a mercury drop electrode in natural water samples was studied. The adsorption of NOM strongly affects the differential pulse anodic stripping voltammogram (DPASV) of copper, leading to its distortion. Phase sensitive ac voltammetry confirme...
Article
Full-text available
This work allowed the characterization of the Cd-binding sites of two compounds taken as models for exudates, the main components of soil organic matter (SOM). The studied compounds were exopolysaccharides (EPS), specifically exudates of roots (polygalacturonic acid) and of soil bacteria (Phytagel). Potentiometric acid-base titrations were performe...
Article
Full-text available
Complexing affinities of a concentrated marine dissolved organic matter (DOC content of 1.2 mmolC L -1) towards major and trace cations were studied by potentiometric and voltammetric titration techniques. A 2-steps protocol, involving nanofiltration and reverse osmosis, was applied for organic matter pre-concentration. DNOM acidic and binding prop...
Article
It is well known that in aquatic environment inorganic and organic contaminants behaviour is in a great extent controlled by the dissolved natural organic matter (DNOM), modifying their bioavailability and so their toxicity toward micro- and macro-organisms. The properties and reactivity of natural heterogenic DNOM could be strongly influenced by n...
Article
Full-text available
Several electrochemical techniques and methods were used to explore electrochemical behavior of copper while determining its complex-ation parameters in model electrolyte solutions, as well as in fresh, brackish and sea water. It was shown that adsorption of natural organic matter (NOM) strongly influences electrochemical reaction of copper during...
Article
Full-text available
The potentialities of pseudopolarographic approach regarding trace metal speciation were explored. Recorded pseudopolarogram of a particular metal serves as a fingerprint of the analyzed sample. It gives initial information related to qualitative and quantitative purpose: a first approximation of trace metal distribution with respect to labile and...
Article
La mobilité et la biodisponibilité des métaux traces dans l'environnement sont influencées par la présence de matière organique naturelle dissoute (MON) [1]. Les associations métaux- MON, souvent fortes (ex. le FeIII est associé à plus de 99% par des ligands organiques dans les eaux de mer de surface), sont spécifiques de la MON et du métal, et dép...
Article
Under natural conditions, arsenic is often associated with iron oxides and iron(III) oxidative capacity towards As(III) is well known. In this study, As(III) and As(V) removal was performed using synthesised iron(III) phosphate, either amorphous or crystalline. This solid can combine (i) As(III) oxidation by iron(III) and (ii) phosphate substitutio...