Letteratura scientifica selezionata sul tema "Organo-Minéraux"
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Articoli di riviste sul tema "Organo-Minéraux":
Bégin, Yves, e Serge Payette. "La végétation riveraine du lac à l’Eau Claire, Québec subarctique". Géographie physique et Quaternaire 43, n. 1 (18 dicembre 2007): 39–50. http://dx.doi.org/10.7202/032752ar.
Courchesne, François, e William H. Hendershot. "La genèse des podzols". Géographie physique et Quaternaire 51, n. 2 (30 novembre 2007): 235–50. http://dx.doi.org/10.7202/033121ar.
Khayat-Bizri, Y., e M. Bizri. "Constantes de stabilité de complexes organo-minéraux. Interactions des ions Pb, Hg, Ni, Cd avec les composés organiques hydrosolubles des eaux naturelles de la région du Sud-Liban". Cahiers de l'Association Scientifique Européenne pour l'Eau et la Santé 2, n. 1 (1997): 31–36. http://dx.doi.org/10.1051/asees/19970201031.
Njomou Chimi, Adrienne, Martin Lekeufack, Justine Mireille Fotsa, Diane Fowoung, Amandine Elodie Manekeu Tanetsa, Marcelle Léonce Tsimi Edzigui, François Nguetsop e Théophile Fonkou. "Valorisation des eaux usées domestiques en agriculture urbaine par culture hydroponique de la laitue (<i>Lactuca</i> <i>sativa</i> L)". Cameroon Journal of Experimental Biology 17, n. 2 (28 dicembre 2023): 40–46. http://dx.doi.org/10.4314/cajeb.v17i2.7.
Pale, Siébou, Albert Barro, Mahamoudou Koumbem, Aïda Sere e Hamidou Traore. "Effets du travail du sol et de la fertilisation organo-minérale sur les rendements du mil en zone soudano-sahélienne du Burkina Faso". International Journal of Biological and Chemical Sciences 15, n. 2 (22 giugno 2021): 497–510. http://dx.doi.org/10.4314/ijbcs.v15i2.10.
Igue, Mouïnou A., Amour C. Oga, Ibouraïman Balogoun, Aliou Saidou, Guillaume Ezui, Sansan Youl, Gustave Kpagbin, Abdoulaye Mando e Jean M. Sogbedji. "Détermination Des Formules D’engrais Minéraux Et Organiques Sur Deux Types De Sols Pour Une Meilleure Productivité De Maïs (Zea mays l.) Dans La Commune De Banikoara (Nord-Est Du Bénin)". European Scientific Journal, ESJ 12, n. 30 (31 ottobre 2016): 362. http://dx.doi.org/10.19044/esj.2016.v12n30p362.
Tesi sul tema "Organo-Minéraux":
Pecaut, Jacques. "Ingénierie cristalline de matériaux organo-minéraux pour l'optique non linéaire quadratique". Grenoble INPG, 1994. http://www.theses.fr/1994INPG0037.
Henry, Erwin. "Synthèse d’agrégats organo-minéraux : analogues des particules en suspension de rivières". Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0209.
Suspended matter (SM) is involved in the transfer of matter from the continents to the oceans. TSS is quantitatively derived from several sources: erosion of continental surfaces, remobilisation of sediments, aquatic biological activity, and anthropogenic activity introducing particles directly into the aquatic environment. Their composition, size distribution and nature will depend on all the processes that control erosion, biological activity and human activities within a catchment. The objective of this thesis is to develop model systems that mimic suspended matter to better understand the reactivity of these natural particles. The question arises as to the choice of constituents to model these model systems. The work on the suspended matter of the Moselle allows the selection of constituents typical of the natural suspended matter transported by the surface waters of the Moselle basin and by the Orne. In order to reproduce the precipitation of iron oxyhydroxides on illite particles, a weakly concentrated Fe(NO3)3 solution (10-4M) to avoid alteration of the illite particles will be added to an illite suspension and hydrolysed by a KOH solution. The concentration and rate of KOH addition, the titration method and the Fe/illite ratio added during this synthesis will be studied. As the association between illite and polymers is poor in the literature, it was necessary first to prepare an additional series of binary illite-polysaccharide samples to better highlight the influence of iron particles on the interactions between the polymer (Dextran or sodium alginate) and illite particles. In the case of the formation of ternary aggregates, there was no established protocol at the beginning of the thesis. The work first consisted in testing several preparation or synthesis conditions, checking the reproducibility and understanding the influence of each synthesis parameter. The thesis is divided into 4 parts. The first part is a reminder of the different knowledge established on suspended matter, particularly its composition and origins. A summary of the materials present in suspended solids as a subject of research is also developed. A second part presents the strategies for the formation of binary and ternary aggregates as well as the choice of analytical techniques to meet the objectives. These strategies are based on the choice made from several tests carried out during this work. A third part deals with the results obtained on the formation of binary aggregates based on illite and polysaccharides. This chapter details the formation of illite-polysaccharide aggregates as a function of several parameters such as the stirring time of the mixture, the concentration of the bivalent salt CaCl2, the concentration and molecular weight of the polysaccharide and the added polysaccharide. Chapter 4 is presented as a scientific paper under review for Applied Clay Science. This chapter, in the form of a scientific article in preparation, first presents the formation of binary Fe-illite aggregates as a function of several parameters such as the rate of addition or the concentration of added KOH and the amount of added iron in the illite suspension. A reminder of some of the results of chapter III is also given. In a second step, the formation of ternary aggregates is compared to that of binary illite-polysaccharide aggregates. A general conclusion is also given at the end of this thesis, allowing us to propose some perspectives to this work
Laoutid, Fouad. "Développement de nouveaux systèmes retardateurs de flamme utilisant des composés minéraux et organo-minéraux dans le polyéthylène térephtalate recyclé". Montpellier 2, 2003. http://www.theses.fr/2003MON20008.
Di, Bitetto Arnaud. "Étude structurale et dynamique d’hydroxydes doubles lamellaires : du matériau carbonaté aux hybrides organo-minéraux". Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0191/document.
This thesis work is based on the synthesis and the characterization of layered double hydroxides (LDHs) by an approach combining vibrational spectroscopy, solid-state NMR and X-ray diffraction. The objectives include a description of the cations distribution in the layers, as well as a study of the structural and dynamic properties of the interlayer species. Investigations are mainly carried out for MgII/AlIII LDHs (ratio between 2 and 4) with an increased complexity of the intercalated species: from carbonate for which the materials have a preferential affinity, to other inorganic anions such as halides, perchlorate and nitrate, to finish with organo-mineral hybrids obtained by intercalation of organic anions/biomolecules (amino acids and cyclodextrins).The research carried out highlighted a local cationic order in the layers, preserved after anionic exchange. Furthermore, it has been possible to rationalize the behaviour of each anion in the interlayer space, which strongly depends on the layers charge density, as well as on the hydration state of the compounds. In particular, the coexistence between carbonate and hydrogenocarbonate anions in the interlayer space and their dynamic exchange with atmospheric carbon dioxide are revealed. On the other hand, a new interlayer dynamics probe by 27Al NMR is proposed. Finally, the step-by-step study of LDHs, first intercalating oxalate and then amino acids, allowed the transfer of the knowledge obtained for inorganic LDHs to organo-mineral hybrids. The manuscript ends with an application of cyclodextrins-containing hybrids for the treatment of water polluted with polycyclic organic compounds
Sayen, Stéphanie. "Réactivité de nouveaux matériaux hybrides organo-minéraux à base de silice en solution aqueuse : applications électrochimiques". Nancy 1, 2003. http://www.theses.fr/2003NAN10152.
This thesis deals with the study of the reactivity in aqueous medium of organic-inorganic silica-based materials which were synthesised by copolymerisation according to the sol-gel process. Given their attractive properties (rigidity, great porosity, long range order) these compounds are well-suited as electrode modifiers for applications in electroanalysis. The first part concerns the influence of structure and composition of the SH- and NH2- functionalized silicas towards Cu2+ and Hg2+ ions (uptake and kinetics of complexation). In a second part the obtained results have allowed the preparation of a more complex carnosine-based silica material and its application to the electrochemical detection of Cu2+. Finally a new and versatile method was proposed to generate by electrodeposition porous and mechanically stable functionalized sol-gel films on gold electrode
Lamy, Isabelle. "Complexation dans les sytèmes organo-minéraux modèles et naturels : étude comparative des interactions cuivre (II) - ligand (S) monomères (S) et cuivre (II) - polymères". Lyon 1, 1986. http://www.theses.fr/1986LYO10093.
Thepot, Philippe. "Matériaux hybrides organo-minéraux élaborés à partir de précurseurs moléculaires à liaison Si-C. Caractérisation et réactivité". Montpellier 2, 1993. http://www.theses.fr/1993MON20108.
Akpakouma, Ayitre. "Qualités chimiques et biochimiques des solides de lisier de porc pour une formulation optimale d'engrais organo-minéraux". Master's thesis, Université Laval, 2009. http://hdl.handle.net/20.500.11794/20592.
Shevchenko, Zaitseva Nataliya. "Matériaux mésoporeux hybrides organo-minéraux bi-fonctionnalisés : synthèse, caractérisation physico-chimique et application à l'élimination du chrome". Thesis, Université de Lorraine, 2013. http://www.theses.fr/2013LORR0075/document.
The present work proposes to examine chemical characteristics and behavior of two bifunctionalized silicas exhibiting either a mesostructure (i.e., MCM-41) or not (i.e., silica gel, denoted here SiO2) with respect to the immobilization of chromium species. The organo-functional groups selected to achieve this goal are mercaptopropyl and propylsulfonic acid moieties (MCM-SH,SO3H), on one hand, and mercaptopropyl and ethylenediaminetriacetate groups (SiO2-SH/ED3A) on the other hand. The research has been started with structurally ordered materials, of MCM-41 type, to ensure high surface area and easy and fast accessibility to the functional groups. On the basis of thiol-modified MCM-41, a set of sorbent samples containing different ratio of grafted mercaptopropyl and propylsulfonic acid groups (constant concentration of sulfur = 1 mmol g-1) has been synthesized. Special attention was first given to the characterization of surface chemical contents, which are expected to have a strong influence on sorption parameters. A simple, one-instrument method (conductometric titration) has been applied to the simultaneous determination of thiol- and sulfonic group on MCM-SH,SO3H. Then, the experimental conditions that are likely to provide effective sequestration of Cr(VI) on MCM-SH,SO3H have been defined, notably by studying the effect of pH, solid-to-solution ratio, or composition of the adsorbent (i.e., SH/SO3H ratio). On the basis of received data, a reduction-sorption mechanism explaining the uptake process has been proposed. In a second approach, a second type of bi-functional silica (SiO2-SH,ED3A) was suggested so as to improve the affinity (sorption properties) of the material to the reductively-generated Cr(III) species. Silica-gel was chosen as the matrix to graft controlled amounts of mercaptopropyl and ethylenediaminetriacetate groups at its surface. The performance of such bi-functional adsorbent was evaluated with respect to various experimental parameters likely to affect the reduction-sorption process (pH, solid-to-solution ratio, concentration) in order to determine the uptake mechanism and to compare it with the above adsorbent. Finally, it will be seen how this second adsorbent also offers the advantage of being usable in flowing conditions (column experiments)
De, Junet Alexis. "Caractérisation et dynamique des matières organiques stabilisées au sein des complexes organo-minéraux de sols tropicaux, Ile de La Réunion". La Réunion, 2008. http://www.theses.fr/2008LARE0019.
Interactions between mineral phases and soil organic matter (SOM) lead to the formation of organo-mineral complexes (OM/Micplx), which protect SOM against biodegradation. These OM/Micplx are poorly studied while they have a preponderant role in soil organic carbon (C) storage. Our work focused on (i) the characterization of SOM bound to mineral phases and (ii) the evaluation of C dynamics within OM/Micplx. We studied three different tropical soils which come from La Reunion island (hydric Andosol, Andosol and Cambisol). SOM were analyzed with pyrolitic and spectroscopic method. Our results shown that polysaccharids, lipids and N-compounds (proteins and/or amino acids) were strongly present in OM/Micplx, contrary to lignin. SOM associated with iron oxides have a turn-over higher than SOM associated with aluminosilicates poorly crystallized and SOM associated with gibbsite. Overall, origin and turnover of SOM changed according to the type of mineral phases with which they were bound to
Libri sul tema "Organo-Minéraux":
1934-, Yariv Shmuel, e Cross H. 1930-, a cura di. Organo-clay complexes and interactions. New York: Marcel Dekker, 2002.
(Editor), Shmuel Yariv, e Harold Cross (Editor), a cura di. Organo-Clay Complexes & Interactions. CRC, 2001.