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Comparative Study of the Physicochemical Quality of the Waters of the méné River (Sassandra Watershed, Ivory Coast) in the Dry Season and in the Rainy Season

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Journal of Environmental Protection 2024年第6期15卷 738-746页

作者： Konan Lopez Kouamé Gansso Valentin Akilinon olivier simon m.nanga kom.o Gneneyougo Emile Soro Bi Tié Albert Goula Science and Technology Department Alassane Ouattara University Bouak Ivory Coast Environmental Sciences Laboratory Nangui Abrogoua University Abidjan Ivory Coast

The study carried out on the waters of the méné River led to an overall assessment of its water quality during the dry season and the rainy season. The analysis focused on eight (8) water samples taken from the river during a period of dry season (January-February) and a period of rainy season (June and September). The various physicochemical parameters were measured according to Afnor standardized methods. The readings of temperature, turbidity, pH and conductivity made it possible to account for the disturbances occurring in water quality. A temporal variation correlated with the seasons (dry or rainy) is noted. Turbidity depends on the concentration of suspended solids (SS) in the water and drained particles and therefore on the seasons. Just like the temperature, the conductivity changes with the season. The waters of the méné River are generally acidic. The results obtained show that there is a low level of pollution by chlorides, phosphates, nitrites and nitrates. A slight pollution of the waters of méné in organic matter (chemical oxygen demand values are less than 25 mg∙L−1 during dry season and 32.33 ± 4.73 mg∙L−1 during rainy season) was observed. The concentrations of metallic trace elements such as iron, manganese and aluminum indicate significant pollution of these waters by these elements. overall, the waters of the méné River are of satisfactory quality because all the physicochemical parameters analyzed have values below standards during the dry season as well as during the rainy season with the exception of CoD and a few metallic trace elements.

关键词： méné Physicochemical Parameters River Season Water Quality

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Comparative Study of the Physicochemical Quality of the Waters of the méné River(Sassandra Watershed, Ivory Coast) in the Dry Season and in the Rainy Season

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Journal of Environmental Protection（环境保护） 2024年第6期 738页

作者： Konan Lopez Kouamé Gansso Valentin Akilinon olivier simon m.nanga kom.o Gneneyougo Emile Soro Bi Tié Albert Goula

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Curved digital X-ray detectors

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npj Flexible Electronics 2020年第1期4卷 185-192页

作者： Albert JJmvan Breemen matthias simon olivier Tousignant Santhosh Shanmugam Jan-Laurens van der Steen Hylke B.Akkerman Auke Kronemeijer Walter Ruetten Rob Raaijmakers Lex Alving Jan Jacobs Pawel E.malinowski Florian De Roose Gerwin H.Gelinck Holst Centre/TNo EindhovenThe Netherlands Philips Research EindhovenThe Netherlands Philips Healthcare BestThe Netherlands imec LeuvenBelgium Department of Applied Physics Technical University EindhovenEindhovenThe Netherlands Teledyne Dalsa EindhovenThe Netherlands

A curved image sensor on plastic foil has been developed for cone beam computed tomography(CBCT)X-ray *** image sensor of about 6×8 cm^(2) size has been built on a thin polyimide foil with an indium gallium zinc oxide(IGZo)backplane and an organic photodetectors(oPD)frontplane.A flexible cesium iodide(CsI)scintillator has been attached to the optical sensor with 480×640 pixels of 126µm *** current density of the oPD was low with less than 10^(−7) mA/cm^(2) at−2 V,while an external quantum efficiency(EQE)of about 50%was reached in the visible wavelength range matched to the scintillator *** image quality of the digital X-ray detector allowed for 3D reconstruction images of a bone phantom on a rotating stage with a lab *** curved detector with 32 cm curvature radius opens up the path for very compact CBCT gantries with largely reduced footprint.

关键词： curved curvature allowed

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Design of Fe(3–x)o4 raspberry decorated graphene nanocomposites with high performances in lithium-ion battery

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Journal of Energy Chemistry 2016年第2期25卷 270-275页

作者： olivier Gerber Sylvie Bégin-Colin Benoit P.Pichon Elodie Barraud Sébastien Lemonnier Cuong Pham-Huu Barbara Daffos Patrice simon Jeremy Come Dominique Bégin Institut de Physique et Chimie des materiaux de Strasbourg UMR 7504 - CNRS Universite de Strasbourg 23 rue du Loess 67034 Strasbourg Cedex 08France RS2E - FR CNRS n 3459 Universite Paul Sabatier Toulouse III CIRIMAT 118 route de Narbonne 31062 Toulouse Cedex 9 France French-German Research Institute of Saint-Louis 5 rue du General Cassagnou 68300 Saint-Louis France Institut de Chimie et Procedes pour l'Energie l'Environnement et la Sante UMR 7515-CNRS Universite de Strasbourg 25 rue Becquerel 67087 Strasbourg Cedex 02 France

Fe（3–x）o4 raspberry shaped nanostructures/graphene nanocomposites were synthesized by a one-step polyol-solvothermal method to be tested as electrode materials for Li-ion battery（LIB）. Indeed, Fe（3–x）o4 raspberry shaped nanostructures consist of original oriented aggregates of Fe（3–x）o4 magnetite nanocrystals, ensuring a low oxidation state of magnetite and a hollow and porous structure, which has been easily combined with graphene sheets. The resulting nanocomposite powder displays a very homogeneous spatial distribution of Fe（3–x）o4 nanostructures at the surface of the graphene sheets. These original nanostructures and their strong interaction with the graphene sheets resulted in very small capacity fading upon Li＋ion intercalation. Reversible capacity, as high as 660 m Ah/g, makes this material promising for anode in Li-ion batteries application.

关键词： Graphene Fe3–xo4 raspberry shaped nanostructures Fe3–xo4/graphene nanocomposites Lithium-ion battery Reversible capacity

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