LOMENECH , Claire

Water pollution is an important problem for the environment. The presence of inorganic and organic pollutants, like metallic cations or polyaromatic hydrocarbons (PAHs), causes environmental damage and provokes different health diseases. Many techniques are currently used to extract these pollutants from water but most of them do not allow...

Water pollution is an important problem for the environment. The presence of inorganic and organic pollutants, like metallic cations or polyaromatic hydrocarbons (PAHs), causes environmental damage and provokes different health diseases. Many techniques are currently used to extract these pollutants from water but most of them do not allow...

International audience

International audience

Sorption of H4SiO4 (including experiments as a function of time, Kd measurement with different m/v ratios and sorption edges) onto different iron (hydro)oxides as goethite (α-FeOOH), hematite (α-Fe2O3), and magnetite (Fe3O4) has been studied with concentration of silicates under solubility limit. A surface complexation model has been used to...

International audience

Predictive modelling of uranium speciation in natural waters can be achieved using equilibrium thermodynamic data and adequate speciation software. The reliability of such calculations is highly dependent on the equilibrium reactions that are considered as entry data, and the values chosen for the equilibrium constants. The working group "...

International audience

When a micron-sized magnetizable particle is introduced into a suspension of nanosized magnetic particles, the nanoparticles accumulate around the microparticle and form thick anisotropic clouds extended in the direction of the applied magnetic field. This phenomenon promotes colloidal stabilization of bimodal magnetic suspensions and allows...

When a micron-sized magnetizable particle is introduced into a suspension of nanosized magnetic particles, the nanoparticles accumulate around the microparticle and form thick anisotropic clouds extended in the direction of the applied magnetic field. This phenomenon promotes colloidal stabilization of bimodal magnetic suspensions and allows...

International audience

In this work, iron oxide magnetic nanoparticles (MNP) were synthesized, whose surface was recovered with an oleate double layer in order to investigate the ability of this material to adsorb nickel ions. First, the solution chemistry of oleate ions was investigated in order to determine the CMC value and the arrangements of ions above the CMC....

International audience

International audience

International audience

Humins as biorefineries by-product can be converted with a direct heating treatment into new rigidporous carbon materials known as humins foams. Currently, not many informations about this newmaterial are known. Here, a preparation protocol in two steps involving foaming and carbonization isreported, while the materials have been investigated...

Humins as biorefineries by-product can be converted with a direct heating treatment into new rigidporous carbon materials known as humins foams. Currently, not many informations about this newmaterial are known. Here, a preparation protocol in two steps involving foaming and carbonization isreported, while the materials have been investigated...

International audience

International audience

This series of two papers is devoted to the effect of organic dye (methylene blue, MB; or methyl orange, MO) adsorption on the surface of either bare or citrate-coated magnetic iron oxide nanoparticles (IONPs) on their primary agglomeration (in the absence of an applied magnetic field) and secondary field-induced agglomeration. The present...

International audience

International audience