ADSORPTION CHARBON ACTIF THESES EN PDF

Cinetique de l’adsorption du phenol en couche fluidisee de charbon actif R. Ganho. Thèse Docteur-Ingénieur, Université Paul-Sabatier, Toulouse (). [17] . Etude de l’adsorption de complexes cyanures sur charbon actif .. They demonstrated that the removal of these metal ions followed the descending order : Cu\. Request PDF on ResearchGate | Modélisations des isothermes d’adsorption sur charbon actif de composés aromatiques en solution aqueuse | Models have.

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Experimental results were modelled according to kinetic equations representing pseudo-first order, pseudo-second order reactions, as well as equations for external and intra-particle diffusion.

Revue des sciences de l’eau chatbon, 24 2— Effect of contact time on the adsorption of the basic red dye on sawdust. Solution d’ion dicyanoaurate-charbon actif. Wednesday, April 5, – Have you forgotten your login?

Étude cinétique et thermodynamique de l’adsorptio… – Revue des sciences de l’eau – Érudit

Some investigators have attempted to simulate column performance with mathematical models and the aim of this work is to present the principal models and verify how the different models are applied to break-through curves ; parameters which actf be evaluated by the different equations will also be compared.

Application of the pseudo-second order model to the adsorption of the basic red dye on sawdust.

With the use of the two parameters, the break-through curves have been recalculated fig. In conclusion, nome of the tested models lead to different parameters by using low break-through curve concentrations or others with the whole range of experimental points, but only one CLARK gives a good description of the break-through curves in our actual knowledge. The model developed by CLARK is based on the use of e mass-transfer concept in combination with the Freundlich isotherm fig. Revue des sciences de l’eau 6, n o 1 Tuesday, October 23, – 2: This modification depends on the nature and pressure of the gas used.

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Mohamed Zarrouki 1, 2 Details. The A parameter is related to the depth Z of the adsorbant: The adsorption thermodynamics and isotherms are consistent with a spontaneous exothermic chemisorption reaction, leading to an organized monolayer of the dye molecules on the sorbent surface.

The use of this model is facilitated by our linearization and the case of particular phenomena: The percentage is constant alter 35 cm depth of the activated carton in agreement with the electon microscopy study that showed that the flora was only present in the 10 first centimeters.

The linearized Clark equation 16 gives a good representation of experimental results fig.

Activated carbon is used as the adsorbent. Revue des sciences de l’eau 24, n o adsorptiob The kinetic coefficient Sa, and the maximum capacity adsorption No are shown in table 1.

Revue des sciences de l’eau6 163— This has allowed us to understand the fundamental mechanism of adsorption in a model system which consists of a solution of dicyanoaurate ions and activated carbon. Adsorption isotherm of the basic red dye on sawdust.

Mohamed Zarrouki 1, 2 AuthorId: Low concentrations of organic contaminants are not easily removed by conventional treatment methods, but activated carbon bas a good affinity for various organics and is used in batch or column reactors. The linear flow rates were 3. The general equation is equation The activated carbon efficiency No can be estimated and the adsortpion rate constant calculated from the slope and the y-intercept.

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The kinetics, thermodynamics and isotherms of the adsorption were used to identify the retention mechanisms. The agreement is only for the low values of C in the break-through curves.

Adsorption dynamique en phase liquide sur charbon… – Revue des sciences de l’eau – Érudit

Application of the intra-particle diffusion model to the adsorption of the basic red dye on sawdust. For the kinetics study, perfectly stirred batch experiments were carried out after adjustment of the parameters influencing the system, such as the pH, adsorbent dosage and initial dye concentration.

Mode, dynamic adsorption, activated carton, kinetic parameters, anionic surfactant, humic acids. These groups consist of the sites responsible for the complex adsorption.

Values of the kinetic constants for the adsorption of the basic red dye on sawdust. B value can be determined with the different columns fig. The chemical surface reaction was fitted to a pseudo-second order equation, with very high regression coefficients.