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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The adsorption rate of the dicyanoaurate ion onto the activated carbon was studied as a function of several physical-chemical parameters: The No value is similar to those obtained from the other equations. Tuesday, October 23, – 2: Adsorption dynamique en phase liquide sur charboon actif: Activated carbon-dicyanoaurate ion solution.

Tuesday, July 16, – adsorptionn Application of the pseudo-second order model to the adsorption of the basic red dye on sawdust. Thermodynamic parameters for the adsorption of the basic red dye on sawdust.

Intra-particle diffusion is the rate-limiting step in the process of adsorption beyond 60 vharbon contact time. 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.

Langmuir and Freundlich parameters for the adsorption of the basicred dye on sawdust. The A parameter is related to the depth Z of the adsorbant: 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.

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B value can be determined with the different columns fig. Adsorption isotherm of the basic red dye on sawdust.

The linearized Clark equation 16 gives a good representation of experimental results fig. Revue des sciences de l’eau24 2— 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 eq.

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

Their is good agreement. Revue des sciences de l’eau 24, n o 2 The aim of this work is to study the recovery of precious metals by complexing them with a suitable reagent.

Application of the Langmuir model to the adsorption of the basic red dye on sawdust. 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.

By transposition to the liquid phase, we have calculated the concentration distribution in the bed eq. Application of the intra-particle diffusion model to the adsorption of the basic red dye on sawdust.

These groups consist of the sites responsible for the complex adsorption. This modification depends on the nature and pressure of the gas used. Experimental results were modelled according actjf kinetic equations representing pseudo-first order, pseudo-second order reactions, as well as equations for external and intra-particle diffusion.

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Mohamed Zarrouki 1, 2 Details. Wednesday, April 5, – Values of the kinetic constants for the adsorption of the basic red dye on sawdust.

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

Revue des sciences de l’eau 6, n o 1 The chemical surface reaction was fitted to a pseudo-second order equation, with very high regression coefficients. 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. Effect of the sawdust dosage on the adsorption of the basic red dye in aqueous solution.

La sciure de bois contient des groupements polaires tels que les hydroxyles et les carboxyles. The activated carbon efficiency No can be estimated and the adsorption rate constant calculated from the slope and the y-intercept. Molecules are adsorbed and immobilized onto sites of different energies They do, however, have some interactions with other adsorbed molecules. Effect of contact time on the adsorption of the basic red dye on sawdust.

These methods have given information about the nature of the functional groups which are on the surface of the activated carbon. Effect of pH on the adsorption of the basic red dye on sawdust.