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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Thermodynamic parameters for the adsorption of the basic red dye on sawdust. Basic red dye, sawdust, adsorption, kinetics, mechanisms. The chemical surface reaction was fitted to a pseudo-second order equation, with very high regression coefficients.

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Wednesday, April 5, – 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 adsorption rate of the dicyanoaurate ion onto the activated carbon was studied as a function of several physical-chemical parameters: By transposition to the liquid phase, we have calculated the concentration distribution in the bed eq.

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

Their is good agreement. Tuesday, July 16, – 2: This modification depends on the nature and pressure of the gas used. Effect of the sawdust dosage on the adsorption of the basic red dye in aqueous solution.


Mohamed Zarrouki 1, 2 AuthorId: Application of the external diffusion model to the adsorption of the basic red dye on sawdust. The activated carbon efficiency No can be estimated and the adsorption rate constant calculated from the slope and the y-intercept.

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.

The kinetic coefficient Sa, and the maximum capacity adsorption No are shown in table tbeses.

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The general equation is fheses Langmuir and Freundlich parameters for the adsorption of the basicred dye on sawdust. Values of the kinetic constants for 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 linearized Clark equation 16 gives a good representation of experimental results fig.

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

Effect of temperature on the adsorption of the basic red dye on sawdust. 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 coefficients A and B table 1 are determined from the straight lines obtained with the low break-curve concentrations fig. 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.


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 No value is similar to those obtained from the other equations. Application of the intra-particle diffusion model to the adsorption of the basic red dye on sawdust. With a gas-liquid-solid treatment, we have modified the nature and the distribution of the sites on the activated carbon surface.

The interactions between this solution and the solid were characterized by several methods: Revue des sciences de l’eau24 2— Effect of pH on the adsorption of the basic red dye on sawdust.

Effect of contact time gheses the adsorption of the basic red dye on sawdust. Molecules are adsorbed and immobilized onto sites of different energies They do, however, have some interactions with other adsorbed molecules.

The use of this model is facilitated by our linearization and the case of particular phenomena: Solution d’ion dicyanoaurate-charbon actif. The kinetics, thermodynamics and isotherms of the adsorption were used to identify the retention mechanisms. Kinetic modeling thesea the adsorption of basic dyes by kudzu. Adsorption isotherm of the basic red dye on sawdust.

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