Academic literature on the topic 'Charbon actif en poudre ou en grain'
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Journal articles on the topic "Charbon actif en poudre ou en grain":
Mechouk, C., A. Hauret, F. Khajehnouri, and P. Burnet. "Traitement des micropolluants en station de potabilisation." Techniques Sciences Méthodes, no. 6 (June 2019): 51–70. http://dx.doi.org/10.1051/tsm/201906051.
Dumoutier, N., I. Baudin, C. Anselme, and J. Manem. "Elimination de la matière organique biodégradable par ultrafiltration." Revue des sciences de l'eau 5 (April 12, 2005): 177–88. http://dx.doi.org/10.7202/705159ar.
Ayele, J., B. Fabre, and M. Mazet. "Influence de l'origine et de la nature des substances humiques sur l'adsorption de l'atrazine sur charbon actif en poudre." Revue des sciences de l'eau 6, no. 4 (April 12, 2005): 381–94. http://dx.doi.org/10.7202/705181ar.
Gaid, A., and P. Sauvignet. "Les micropolluants organiques : présence dans les effluents urbains et traitement – Résultats d’essais pilotes industriels sur la station d’épuration d’Herford (Allemagne)." Techniques Sciences Méthodes, no. 7-8 (July 2019): 81–92. http://dx.doi.org/10.1051/tsm/201907081.
Ayele,, J., A. Mahi, and M. Mazet. "Influence du dodécylsulfate de sodium sur l'adsorption des acides humiques sur charbon actif en poudre." Revue des sciences de l'eau 3, no. 4 (April 12, 2005): 425–39. http://dx.doi.org/10.7202/705083ar.
Yaacoubi, A., and J. Ayele. "Sorption de l'atrazine et du diuron sur charbon actif en poudre en présence de tensioactifs, ions calcium et bichromate. Essai de modélisation." Revue des sciences de l'eau 12, no. 2 (April 12, 2005): 389–406. http://dx.doi.org/10.7202/705357ar.
Tahina Lalaina, Randrianantoandro, and Herizo Ramanantsoa. "Etude De Mécanisme d’Adsorption Du Colorant d’Indigo Carmin (IC) Sur Du Charbon Actif A Base De Coques De Noix De Coco (CACC)." International Journal of Progressive Sciences and Technologies 39, no. 1 (June 20, 2023): 127. http://dx.doi.org/10.52155/ijpsat.v39.1.5364.
Cathalifaud, G., J. Ayele, and M. Mazet. "Adsorption de molecules organiques sur charbon actif en poudre: Influence des ions aluminium." Environmental Technology 14, no. 5 (May 1993): 443–51. http://dx.doi.org/10.1080/09593339309385312.
Ayele, J., A. Mahi, and M. Mazet. "Étude de l'adsorption de l'atrazine sur le charbon actif en poudre en présence de tensioactifs." Revue des sciences de l'eau 8, no. 3 (April 12, 2005): 355–70. http://dx.doi.org/10.7202/705228ar.
Mahi, A., J. Ayele, and M. Mazet. "Etude de l'adsorptton d'acides humiques sur charbon actif en poudre en presence d'un tensioactif cationique." Environmental Technology 13, no. 1 (January 1992): 55–64. http://dx.doi.org/10.1080/09593339209385128.
Dissertations / Theses on the topic "Charbon actif en poudre ou en grain":
Lissaneddine, Amina. "Formulation d’adsorbant à base de matériaux naturels et leurs combinaisons au procédé électrochimique pour traiter des effluents industriels." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0296.
Olive mill technology generates a considerable amount of solid (olive pomace) and liquid (olive mill wastewater) by-products during olives milling season, usually between November and March. These wastes represent a great challenge for olive oil producers since they must find technical, environmental and economical solutions to manage these by-products. The main objective of this thesis was to explore and propose a complete cycle of olive mill wastes treatment. This is in the framework of a zero liquid and waste discharge approach and promotes the circular economy concept. Two sorbents based on olive pomace chemical activation, i.e., powdered activated carbon within composite alginate beads and granular activated carbon (GAC), were successfully synthetized. Both materials had a structure and a porous morphology that revealed their feasibilities as potential and low-cost bio-sorbents. They were employed in either adsorption or electrosorption for phenolic compounds (PCs) recovery from olive mill wastewater (OMWW). The adsorption of PCs fitted second-order kinetics (R2 = 0.997) and Langmuir isotherms (R2 = 0.995). The thermodynamic parameters for the PCs adsorption onto the bio-adsorbent suggested a spontaneous nature of adsorption, an endothermic reaction and a modification of bio-adsorbent surface during the adsorption process. Thomas's model was better at predicting PCs column adsorption (R2 =0.97). Finally, the investigation of bio-adsorbent regeneration showed that the recovery of phenols from OMWW could be carried out with ethanol (43% of PCs recovered) or hydrochloric acid (90% of PCs recovered). The results of electrochemical characterization of the two bio-adsorbent electrodes showed that the high electroactive surface area, the high value of exchange current intensity (I0) and the low value of charge transfer resistance (RCT) could be promising properties for electrosorption studies. Electrosorption improved the adsorption capacity of the composite beads from 123 to 170 mg g-1 and the removal rate of PCs from 66 to 74% for GAC. Furthermore, the electrosorption of organic compounds was shown for the first time with real wastewater. New models were developed to better understand and predict PCs electrosorption kinetics, including transient mass transport. The remaining organic compounds in OMWW were then eliminated (91 % of chemical oxygen demand (COD) removed) by advanced electro-oxidation treatment, while the bio-adsorbent was regenerated (34.5% of PCs recovered) by an electrochemical method
Mardini, Fadi Al Begube Bernard. "Etude de l' adsorption du pesticide Bromacil sur charbon actif en poudre en milieu aqueux." Poitiers : I-Médias, 2008. http://08.edel.univ-poitiers.fr/theses/index.php?id=1043.
Mardini, Fadi Al. "Etude de l'adsorption du pesticide Bromacil sur charbon actif en poudre en milieu aqueux : effet compétiteur des matières organiques naturelles." Poitiers, 2008. http://theses.edel.univ-poitiers.fr/theses/2008/AlMardini-Fadi/2008-AlMardini-Fadi-These.pdf.
The aim of this doctorate was to conduct a detailed study of the adsorption of Bromacil (herbicide) on a powdered activated carbon, PAC SA-UF, at pH 7. 8 and at 20 °C. The application of several models of mono-solute equilibrium isotherm has generally shown that the adsorption of Bromacil is on two types of sites. Works on the kinetics adsorption have shown that it is not possible to specify apparently if the surface reaction is kinetically determinative. The model of pseudo-second order of the surface reaction applies particularly well and led to constant values independent of the equilibrium concentration, except for low equilibrium concentrations where the constants become significantly more important. This confirms perfectly the hypothesis based on two types of sites. In the last part, we showed that the adsorption isotherms of some natural organic matters on PAC have special shapes that may be interpreted by the presence of several fictitious fractions. The competitive adsorption due to fractions strongly adsorbable with an effect on the equilibrium parameters is apparently the predominant mechanism in our case
Chokki, Jeannette. "Vulnérabilité du procédé couplant charbon actif en poudre et ultrafiltration : vieillissement des membranes et rétention de composés organiques polaires." Thesis, Poitiers, 2019. http://www.theses.fr/2019POIT2275/document.
The degradation of water resources by the presence of organic matter (OM) and micropollutants requires the implementation of robust drinking water production processes. In this context, many French municipalities such as Saint Cloud and Angers have decided to set up a powdered activated carbon adsorption process coupled to ultrafiltration (PAC/UF). PAC is used upstream of membranes to remove traces of micropollutants while UF membranes provide excellent and constant water quality over time. However, the feedback reveals a degradation of the separation performances related in particular to an aging of the membrane materials and a vulnerability of the process towards some emerging micropollutants such as polar organic compounds (PMOCs).The work carried out during this thesis aims to better understand the consequences of the chemical aging of the membranes used in these processes and to evaluate the micropollutants removal efficiency in order to propose optimization ways. More particularly it has been shown that the main cause of aging is the chlorine exposure of the membranes during washing phases modifying the properties of the materials. In fact, the numerous characterization tools used have made it possible to demonstrate a correlation between the degradation of the hydrophilic agent of the membranes and the increase in the permeability during exposure to chlorine. The study of the membrane performances revealed an alteration of the resistance to fouling towards OM for membranes exposed to chlorine. However, the results obtained to evaluate the selectivity performance of the membranes with respect to viruses have not underlined any major alterations. Adsorption tests have demonstrated the limited efficiency of PAC for PMOCs removal. Indeed, among the molecules tested, the most hydrophobic and aromatic molecules are effectively adsorbed on PAC while the more polar ones are slightly adsorbed. Finally, the use of nanofiltration or low-pressure reverse osmosis, with average rejection rates over 90%, makes them the technological solutions of choice for the removal of PMOCs
Ye, Ni. "Modélisation de l’adsorption de micropolluants organiques émergents dans des filtres à charbon actif en grain : Développements d’outils prédictifs." Thesis, Rennes, Ecole nationale supérieure de chimie, 2018. http://www.theses.fr/2018ENCR0051.
The process of adsorption in fixed bed with granular activated carbon is recognized as an efficient technology to removal micropollutants in drinking water treatment plant. For industrial design and practical maintenance perspectives, it is useful to develop prediction tools to describe the adsorption behavior in the reactor. The primary objective of this research is to consider different approaches to evaluate and predict the micropollutant removal efficiencies in industrial adsorption process. Experimentations, at lab scale and industrial scale, have been performed for this purpose. The study assessed firstly adsorption capacities and kinetics of more than twenty pesticides and pharmaceutical residues with granular activated carbon under realistic industrial conditions, especially with the effects of water matrix (3 resources) and carbon aging (4 ages). The results showed some similar adsorption behavior for the waters from the three studies plants. While carbon aging reduced globally adsorption capacities in lab-scale studies, this effect on adsorption kinetic differed, at both lab-scale and full-scale studies, according to compounds. Several modelling approaches were investigated to predict observed adsorption behavior: experimental model, QSAR-like empirical model, and mechanical model. The ability of these approaches to predict the micropollutant removal efficiency in industrial and complex conditions, based on lab or literature data, could be validated with some restrictions. The quality and reliability of the prediction will still highly depend on the effort being made to obtain condition specific information. These approaches will form the kernel of future prediction tools for further practical implementations
Allali-Hassani, Mohamed. "Etude de l'adsorption de tensioactifs non ioniques sur charbon actif : influence de coadsorbats, essai de modelisation." Poitiers, 1988. http://www.theses.fr/1988POIT2284.
Hamdaoui, Oualid. "Contribution à l'étude et à la modélisation des phénomènes d'adsorption-désorption de composés organiques sur charbon actif en grain en l'absence et en présence d'ultrasons." Chambéry, 2004. http://www.theses.fr/2004CHAMS047.
The aim of this work is to study and model the adsorption of phenol and chlorophenols onto granular activated carbon and to specify the feasibility of using ultrasound to enhance the desorption of these organic compounds from the adsorbent. The study and modeling of the adsorption kinetics of phenolic compounds on activated carbon show that the two limiting stages of adsorption are the transport through the boundary layer and intraparticle diffusion. Isotherm modeling reveals that adsorption is in monolayer and it is carried out in definite and localised sites, the already occupied sites do not authorize the fixation of other molecules of adsorbate, the adsorbed phenolic molecules are pushed back and thus there is no association between them and the adsorption is carried out on energitecly different sites. The effects of ultrasound of various frequencies and intensities on adsorption-desorption processes of 4-chlorophenol on granular activated carbon were studied and discussed. Adsorption capacities obtained in the presence of ultrasound are lower than that observed in the absence of the ultrasonic field and they are inversely proportional to ultrasound intensity. Comparison of kinetic curves shows that the adsorption rate of 4-chlorophenol is higher in the presence of ultrasound. The desorption of 4-chlorophenol from the granular activated carbon surface was studied in the absence and presence of ultrasound of various frequencies and powers. The desorption rates obtained in the presence of ultrasonic field are largely higher than those observed in the absence of ultrasound. The amount of 4-chlorophenol desorbed increases with the intensity of ultrasound. Addition of naoh and/or ethanol to the system involves an increase of the amount of 4-chlorophenol desorbed, especially in the presence of ultrasound. The influence of ultrasound on desorption consists of their thermal and non-thermal effects. Sonochemical and sonophotochemical methods of regeneration of the activated carbon saturated with phenolic compound are very promising techniques which simultaneously lead to mineralize the organic compound and to regenerate the activated carbon. These techniques do not modify the specific surface and the adsorption capacity of the activated carbon after several cycles of adsorption-regeneration
Baup, Stéphane. "Elimination de pesticides sur lit de charbon actif en grain en présence de matière organique naturelle : Elaboration d'un protocole couplant expériences et calculs numériques afin de simuler les équilibres et les cinétiques compétitifs d'adsorption." Phd thesis, Université de Poitiers, 2000. http://tel.archives-ouvertes.fr/tel-00983252.
Baup, Stéphane. "Elimination de pesticides sur lit de charbon actif en grain en présence de matière organique naturelle : élaboration d'un protocole couplant expériences et calculs numériques afin de simuler les équilibres et les cinétiques compétitifs d'adsorption." Poitiers, 2000. https://tel.archives-ouvertes.fr/tel-00983252.