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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Application of the external diffusion model to the adsorption of the basic red dye on sawdust. Mohamed Zarrouki 1, 2 AuthorId: 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.

This modification depends on the nature and pressure of the gas used.

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The Freundlich isotherm theaes fig. 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. With a gas-liquid-solid treatment, we have modified the nature and the distribution of the sites on the activated carbon surface. Tuesday, October 23, – 2: Mode, dynamic adsorption, activated carton, kinetic parameters, anionic surfactant, humic acids.

Thermodynamic parameters for the adsorption of the basic red dye on sawdust. Mohamed Zarrouki 1, 2 Details. Values of the kinetic constants for the adsorption of the basic red dye on sawdust. Revue des xdsorption de l’eau 24, n o 2 Effect of contact time on the adsorption of the basic red dye on sawdust. Revue des sciences de l’eau 6, n o 1 The linear flow rates were 3. The aim of this work is to study the recovery of precious metals by complexing them with a suitable reagent.


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 sdsorption we proposed a simple method to calculate A and r by a linearization of the preceding equation eq. The interactions between this solution and the solid were characterized by several methods: 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.

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

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. Activated carbon is used as the adsorbent.

These groups consist avtif the sites responsible for the complex adsorption. Effect of pH on the adsorption of the basic red dye on sawdust. 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.

The chemical surface reaction was fitted to a pseudo-second order equation, with very high regression coefficients. Tuesday, July 16, – 2: The kinetics, adsotption and isotherms of the adsorption were used to identify the retention mechanisms. Basic red dye, sawdust, adsorption, kinetics, mechanisms. The agreement is only for the low values of C in the break-through curves. 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. 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.


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.

Effect of the sawdust dosage on the adsorption of the basic red dye in aqueous solution.

Solution d’ion dicyanoaurate-charbon actif. From the difference in the area of the two curves, it is possible to calculate the supplementary biological degradation.

These methods have given information about the nature of the functional groups which are on the surface of the activated carbon. Activated carbon-dicyanoaurate ion solution. 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.

Wednesday, April 5, – Their is good agreement. Adsorption isotherm of the basic red dye on sawdust. The A parameter is related to the chsrbon Z of the adsorbant: The activated carbon efficiency No can be estimated and the adsorption rate constant calculated from the slope and the y-intercept.

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

With the use of the two parameters, the break-through curves have been recalculated fig. Effect of temperature on the adsorption of the basic red dye on sawdust.

Revue des sciences de l’eau24 2—