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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Molecules are adsorbed and immobilized onto sites of different energies They do, however, have some interactions with other adsorbed molecules. The coefficients A and B table 1 are determined from the straight lines obtained with the charvon break-curve concentrations fig.

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

The general equation is equation Two parameters A and r are determined by regression equations ; we proposed a simple method to calculate A and r by a linearization of the preceding equation eq. Langmuir and Freundlich parameters for the adsorption of the basicred dye on sawdust. Tuesday, July 16, – 2: Application of the external diffusion model to the adsorption of the basic red dye on sawdust.

Values of the kinetic constants for the adsorption of the basic red dye on sawdust. From the difference in the area of the two curves, it is possible to calculate the supplementary biological degradation.

Mode, dynamic adsorption, activated carton, kinetic parameters, anionic surfactant, humic acids. Revue des sciences de l’eau24 2— B value can be determined with the different columns fig.

Adsorption dynamique en phase liquide sur charbon actif: 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. Adsorption isotherm of the basic red dye on sawdust. The Freundlich isotherm equation fig.

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The percentage is constant alter 35 cm depth of the activated carton in agreement with the electon microscopy study that showed that the adsofption was only present in the 10 first centimeters. 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 can be evaluated by the different equations will also be compared.

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The thermodynamic study has shown that the data tiken from adsorption of the dicyanoaurate ions onto the carbon can be fitted by LANGMUIR’s isotherm, which has been generalized for several types of sites.

Activated carbon is used as the adsorbent.

Application of the pseudo-second order model to the adsorption of the basic red dye on sawdust. Effect of contact theess on the adsorption of the basic red dye on sawdust. The No value is similar to those obtained from the other equations. By transposition to the liquid phase, we have calculated adorption concentration distribution in the bed eq.

This modification depends on the nature and pressure of the gas used. Mohamed Zarrouki 1, 2 Details.

As early as BOHART and ADAMS presented differential equations which govern the dynamics of the adsorption of vapours and gases on fixed beds and the final result, applied to the liquid-solid phase, yields the kinetic adsorption rate k and the maximum adsorption capacity No adsorptlon.

The activated carbon efficiency No can be estimated and the adsorption rate constant calculated from the slope and the y-intercept. These adslrption have given information about the nature of the functional groups which are on the surface of the activated carbon.

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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.

Application of the Langmuir model to the adsorption of the basic red dye on sawdust. The linearized Clark equation 16 gives actuf good representation of experimental results fig.

The agreement is only for the low values of C in the break-through curves. The model developed by CLARK is based on the use of e mass-transfer concept in combination with the Freundlich isotherm fig. The adsorption zdsorption and isotherms are consistent with a spontaneous exothermic chemisorption reaction, leading to an organized monolayer of the dye molecules on the sorbent surface.

The kinetic coefficient Sa, and the maximum capacity adsorption No are shown in table 1. The linear flow rates were 3.

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. Effect of the sawdust dosage on the adsorption of the basic zctif dye in aqueous solution. Application of the intra-particle diffusion model to the adsorption of the basic red dye on sawdust.

Effect of temperature on the adsorption of the basic red dye on sawdust.

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