About
109
Publications
31,275
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
2,174
Citations
Publications
Publications (109)
Regular dredging of sediments is necessary to ensure the proper functioning of naval and river infrastructures. In a context of generalised scarcity of raw materials for construction products, the recovery of sediments can, in a circular economy approach, constitute a sustainable solution for local operators. In order to ensure the environmental su...
Each year, hundreds of millions of tons of sediments are dredged around the world. Alternatively to sea or land disposal, the reuse of these sediments as raw material in various civil engineering applications is developing. In this context, the French SEDIBRIC project (valorisation de SEDIments en BRIQues et tuiles) aims to replace, in the preparat...
Soil contamination is becoming a major concern due to the rapid urbanization and industrialization. The urgency to clean contaminated sites using biological methods becomes important. This paper presents for the first time the bioaugmentation effect of the fungal strain Absidia cylindrospora on a co-contaminated industrial soil. The tests were carr...
his study determined mineral value and antioxidant activity of Senegal fruits
for contributing to improving healthy diet and preventing some chronic dis-
eases. Mineral element contents of Dialium guineense, Landolphia heudelotti,
Mangifera indica, Cyperus esculentus and Saba senegalensis, which are widely
available and consumed, were studied. T...
Fungi could be considered as an effective tool for treating metal pollution in soils because of their metal tolerance and biosorption capacity. While most of biosorption studies intended for bioremediation trials are carried out in liquid medium, this study presents the development of a new type of soil microcosm, designed to evaluate the fungal bi...
Single and sequential extractions are current and useful tools for estimating the availability of metals in soils or sediments. Many chemical extraction procedures have been proposed in the literature, making the comparison difficult. This study compares the data consistency of the potential availability given by four chemical extractions commonly...
Potentially toxic element (PTE) distribution in 21 soil samples, 07 stream sediment samples and wheat near an abandoned mining site in the region of Lakhouat (northwestern Tunisia), sampled during dry season was investigated. The main objective was to characterize the environmental impacts of the former Pb-Zn extractive activity in the region. Chem...
This presentation is about a mycoremediation study within a microcosm of a multi-contaminated soil by the fungal strain Absidia cylindrospora
Microwave-induced plasma optical spectrometry (MIP OES) and induced coupled plasma optical spectrometry (ICP OES) were implemented in parallel for the determination of Cd, Cu, Cr, Ni, Pb, and Zn in sediments, as well as in unexplored matrices such as sewage sludge and fired brick. Initially, a microwave-assisted digestion procedure was applied to s...
Nowadays, trace metal contamination of soils is a worldwide concern. In the soil, the trace metals are distributed within different mineralogical fractions, which influence the transfers and the bio-availability, then the associated toxic risk. This study aims to investigate how the development of selected fungal mycelium influences the mineralogic...
Trace metal contamination is a widespread and complex environmental problem. Because fungi are capable of growing in adverse environments, several fungal species could have an interesting potential in remediation technologies for metal contaminated environments. This study proposes to test the ability to tolerate and biosorb three trace metals (Cd,...
A treatment with hydraulic binders confers to soils enhanced physical and mechanical characteristics that allows their integration in a road section. To gain acceptance of this technique, there is a clear requirement of studies that provide information on success and failures. The aim of this study was to investigate the influence of the salts (i.e...
To protect their steel structures from corrosion by cathodic protection, many harbours use aluminium sacrificial anodes, which induces aluminium release and potential contamination of the surrounding waters and sediments. To study the impact on Al mobility, a natural marine sediment was artificially contaminated with aluminium from different source...
Trace metals cause deterioration of the soil and constitute a major concern for the environment and human health. Bioremediation could be an effective solution for the rectification of contaminated soils. Fungi could play an important role in biodegradation because of the morphology of their mycelium (highly reactive and extensive biological surfac...
The treatment of soils with hydraulic binders improves their physical and mechanical characteristics, allowing them to be used in several geotechnical applications. The aim of this work is to assess the influence of nitrate ions on the mechanical performances of treated soils. Compressive strength are measured between 7 and 360 days for three soils...
Les éléments traces métalliques (ETM) sont des contaminants majeurs souvent à rémanence souvent longue et à potentiel toxique important. Pour la plupart non métabolisés, ils s’accumulent dans les écosystèmes, en particulier les sols où ils représentent la seconde pollution après les hydrocarbures (ADEME, 2015). Cette pollution des sols génère des r...
Sols et sédiments pollués Teneurs élémentaires totales et biodisponibles Pour pouvoir affirmer qu'un sol (ou sédiment) est pollué par des éléments chimiques, il est nécessaire de connaître les compositions chimiques élémentaires classiques des sols/sédiments sains, vierges de toute perturbation anthropique. Dans cette optique, ce livre présente les...
This study focuses on chromium detected in 13 harbor sediments dredged across the English Channel. The total concentrations of Cr range from 5 to 61mgkg(-1), which reveal no or low enrichment for 12 of the 13 samples, according the enrichment factor (EF) calculations. Sequential extraction procedure was applied to determine the mineralogical specia...
Ce guide a été conçu dans l'objectif d'aider les étudiants désireux de valoriser leur stage, en optimisant leur note de stage. Ce guide résume toutes les consignes, les règles simples à respecter, pour pouvoir rédiger
un rapport de stage et le présenter lors de la soutenance devant un jury dans les meilleures conditions possibles. Ce guide reprend...
Our ongoing research work is aimed at assessing the influence of a treatment of soils with hydraulic binders on the stabilisation of trace elements. For three soils treated according to two standard formulations, the stabilisation of trace (As, Cd, Cr, Cu, Ni, Pb and Zn) and major elements (Al, Ca, Fe, S and Si) is not systematically effective. Aft...
The management of dredged marine sediment is an issue for many harbours, particularly when contaminant concentrations prevent disposal at sea. The stabilisation/solidification of the sediments with hydraulic binders for a use in road subgrade layer is a potential alternative solution. However, the environmental acceptability is not yet fully establ...
A laboratory experiment was performed, in tidal artificial conditions, with natural defaunated sediments that were artificially contaminated with aluminium salts. Benthic diatoms were cultivated on these contaminated sediments in a tidal mesocosm with natural seawater, in order to assess the aluminium impact on the growth of benthic diatom. The sed...
The mobility of Cu, Pb and Zn in harbour sediments was investigated using single, sequential and kinetic extraction techniques. Each type of extraction provides different information on the mobility of these elements in the environment. The single HCl extraction assesses general mobility, the sequential extraction assesses geochemical partitioning...
The use of soils after treatmentwith hydraulic binders results in the improvement of their physical and mechanical characteristics for geotechnical applications. The influence of sulfate and chloride ions, introduced as CaSO4·2H2O and NaCl, on physical and mechanical properties of a treated soil is investigated. For the considered soil, in the pres...
The treatment of soils with hydraulic binders improves their physical and mechanical characteristics,
allowing the soils to be reused in several geotechnical applications such as road construction. The aim
of this research study is to assess the influence of sulfate, chloride, nitrate and phosphate ions, introduced
as CaSO4�2H2O, NaCl, NH4NO3 and K...
The reuse of soils after adding binder agents results in the improvement of their physical and mechanical characteristics, allowing them to be reused in several geotechnical applications. Our ongoing research work is aiming at assessing the influence of chloride and sulfate ions, introduced as NaCl and CaSO4·2H2O, on physical and mechanical propert...
The aim of the study presented here is to show the influence of the sulphate ions, as
gypsum CaSO4.2H2O, on the physical, mechanical and physicochemical behaviours of three soil treated
with quicklime and hydraulic road binder. According to the soil and the cure conditions, the sulphate ions
can induce important volumetric swelling or lead to a dec...
Pervious concrete is a green alternative to conventional pavements with minimal fine aggregate and a high void content. Pervious concrete allows water to infiltrate through the pavement, thereby reducing the runoff and the requirement for stormwater management systems. Seashell By-Products (SBP) are produced in an important quantity in France and a...
Important quantities of metals can be released from soils, accumulate in plants and then enter the food chain. Thus, the consumption of vegetables grown on contaminated soils has become one of the major routes of human exposure to potentially toxic metals. It is then crucial to better understand the various processes controlling metal mobilization...
Pervious concrete is a green alternative to conventional pavements with minimal fine aggregate and a high void content. Pervious concrete allows water to infiltrate through the pavement, thereby reducing the runoff and the requirement for stormwater management systems. Seashell By-Products (SBP) are produced in an important quantity in France and a...
Cathodic protection using Al sacrificial anodes is a method of corrosion control that is often applied to
submerged metallic structures. This technique leads to the progressive dissolution of the sacrificial anode
and the metal(s) constituting the anode are inevitably released into the surrounding aquatic environment
with potentially detrimental ef...
One of the major routes of human exposure to toxic metals is the consumption of vegetables grown on contaminated soils. Radishes were grown in three different soils (kitchen garden, agricultural and industrial soils), presenting various contamination levels. A sequential extraction procedure was compared with EDTA and HCl simple extractions methods...
The reuse of soils after adding binder agents is becoming more and more applied. This treatment technique
results in the improvement of the physical and mechanical characteristics of the soils, allowing them to be
reused in several geotechnical applications.
However, in some cases, the treated soil (hydraulic binders-soil mixes) shows harmful effec...
The reuse of soils after adding binder agents is becoming more and more applied. This
treatment technique results in the improvement of the physical and mechanical characteristics
of the soils, allowing them to be reused in several geotechnical applications.
However, in some cases, the treated soil (hydraulic binders-soil mixes) shows harmful effec...
: Several studies have shown that there is a positive association between the risk of lung cancer and the inhalation of the radon. The objectives of this chapter are to examine the air quality in a house situated in Calvados (France) which is naturally rich in radon, and to assess ways to improve indoor air quality. Radon concentrations indicate th...
The structure and morphology of natural scale deposits formed in Ouargla's pipelines, southern Algeria, were characterized by using ICP-AES, X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy and energy dispersive spectroscopy (SEM/EDS). The precipitate is mainly composed of CaCO3 with the prevalence of the aragonite phase. G...
The influence of marine sediments on calcareous deposit formed on carbon steel samples was studied in natural seawater during 12 months. The calcareous deposit formation is highly delayed compared to those formed under controlled laboratory conditions with artificial or natural seawater. Moreover, the deposit formed is essentially composed of monoh...
D'après des études récentes, il existe un lien entre le risque de cancer du poumon et l'exposition domestique au radon. Pour autant, la prise de conscience du problème en France s'est faite relativement tardivement. Nous avons choisi de mener une expérience portant sur la concentration en radon dans une maison particulière du Calvados. Il s'agit de...
Recent studies indicate a link between the risk of lung cancer and residential radon
exposure. However, in France, awareness of this problem was made relatively late.
Accordingly this study examines the radon concentration in a private home in Calvados.
Findings show that the presence of a fireplace in a house can accelerate radon convective
transf...
The effects of temperature and concentration of five scale inhibitors (three polyphosphates, one
polyphosphonate and one polycarboxylate) on calcium carbonate (CaCO3) precipitation from hard water
are reported in this paper. The CaCO3 precipitation from calcocarbonically pure water was induced by
imposed potential and studied on gold electrode by c...
This study investigate the influence of kaolinite, introduced in electrolytes solutions, on the calcareous
deposit formation, which is monitored by chronoamperometric measurements coupled with chemical
impedance spectroscopy analyses. The deposits formed are observed by scanning electron microscopy
and analysed by Raman spectroscopy and X-ray diffr...
Cathodic protection by sacrificial zinc anodes is often applied to prevent immerged metallic structures from corrosion. But this technique induces the zinc anodes dissolution, which can induce marine sediments and seawater contamination. A large scale experiment, in natural seawater, was conducted during 12 months, in order to evaluate the potentia...
Ports infrastructures are generally protected by cathodic protection using aluminium sacrificial anodes. Anodes are then dissolved in seawater and Al can accumulate in sediments. This study was led in the framework of the European EFFORTS project. Investigations were realized on sediments and water from a French port, which uses aluminium sacrifici...
A large-scale experiment, with natural seawater and sediments, was conducted during one month to evaluate the possible interaction of cathodic protection (E=–1V/Ag–AgCl) on the distribution patterns of trace elements present in the sediments. No influence on metals’ lability and distribution within marine sediments was observed. Nevertheless, the s...
In order to estimate heavy metals partitionning in soil or sediments, to evaluate their mobility and so their bioavailability, a 7-steps sequential chemical extraction procedure had been developed and published (Leleyter and Probst, 1999). But as the efficiency and selectivity of the acido-soluble extraction was now controversed, the objective of t...
This work compares the quantities of labile metals removed from the Vire River (Normandy) sediments by a sequential extraction procedure to those liberated by single leaches (Mg(NO3)2, HCl and EDTA). Compared to the other extractions, Mg(NO3)2 underestimated the mobility results. The sequential procedure was the most aggressive, except for Ca and P...
Evaluation of metals mobility in sediments of the Vire basin (Normandy, France) by single or sequential extractions.
This work compares the quantities of labile metals removed from the Vire River (Normandy) sediments by a sequential extraction procedure to those liberated by single leaches (Mg(NO3)2, HCl and EDTA). Compared to the other extractions...
Riverine and wind-borne materials transferred from Patagonia to the SW Atlantic exhibit a homogeneous rare earth element (REE) signature. They match well with the REE composition of Recent tephra from the Hudson volcano, and hence this implies a dominance of material supplied by this source and other similar Andean volcanoes. Due to the trapping ef...
These results are part of the study of the biofilm and its influence on the calcareous deposit formation formed on the surface of carbon steel (E24) immersed in natural seawater. The first research related to the chemical characterization of the deposit according to the imposed potential of cathodic protection: –800, –900 and –1000 mV/SCE, after 4...
The bulk of particulate transition metals transported by Patagonian rivers shows an upper crustal composition. Riverine particulate 0.5 N HCl leachable trace metal concentrations are mainly controlled by Fe-oxides. Complexation of Fe by dissolved organic carbon (DOC) appears to be an important determinant of the phases transporting trace metals in...
The occurrence and geochemical behaviour of Fe, Mn, Pb, Cu, Ni, Cr, Zn and Co are studied in riverine detrital materials
transported by Patagonian rivers. Their riverine inputs have been estimated and the nature of these inputs to the Atlantic
Ocean is discussed. Most of the metals are transported to the ocean via the suspended load; there is evide...
