Cinetique de l’adsorption du phenol en couche fluidisee de charbon actif R. Ganho. Thèse Docteur-Ingénieur, Université Paul-Sabatier, Toulouse ().  . 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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This modification depends on the nature and pressure of the gas used. Have you forgotten your login? Revue des sciences de l’eau 24, n o 2 Revue des sciences hheses l’eau 6, n o 1 The linearized Clark equation 16 gives a good representation of experimental results fig. The general equation is equation The use of this model is facilitated by our linearization and the case of particular phenomena: B value can be determined with the different columns fig.
Mohamed Zarrouki 1, 2 AuthorId: Revue des sciences de l’eau6 zctif63— The coefficients A aftif B table 1 are determined from the straight lines obtained with the low break-curve concentrations fig. 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.
Effect of temperature on the adsorption of the basic red dye on sawdust. Low concentrations of organic contaminants are not easily removed by conventional treatment methods, but activated carbon bas a good affinity for various adsorptikn and is used in batch or column reactors. The adsorption rate of the dicyanoaurate ion onto the activated carbon was studied as a function of several physical-chemical parameters: The agreement is only for the low values of C in the break-through curves.
Thermodynamic parameters for the adsorption of the basic red dye on sawdust. The model developed by CLARK is based on the use of e mass-transfer concept in combination with the Freundlich isotherm fig. The kinetic coefficient Sa, and the maximum capacity adsorption No are shown in table 1. Intra-particle diffusion is the rate-limiting step in the process of adsorption beyond 60 min contact time. The limiting step is the diffusion through a film at the start of the reaction, which is followed by the diffusion-adsorption into the porous structure in a region close to equilibrium.
The linear flow rates were 3. Ne, dynamic adsorption, activated carton, kinetic parameters, anionic surfactant, humic acids. With the use of the two parameters, the break-through curves have been recalculated fig.
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. Adsorption dynamique en phase liquide sur charbon actif: Wednesday, April 5, – Application of the intra-particle diffusion model to the adsorption of the basic red dye on sawdust.
By transposition to the liquid phase, we have calculated the concentration distribution charbonn the bed eq.
Étude cinétique et thermodynamique de l’adsorptio… – Revue des sciences de l’eau – Érudit
The Freundlich isotherm equation fig. The kinetics, thermodynamics and isotherms of the adsorption were used to identify the retention mechanisms. Revue des sciences de l’eau24 2— Langmuir and Freundlich parameters for the adsorption of the basicred dye on sawdust.
Application of the Langmuir model to the adsorption of the basic red dye on sawdust. Basic red dye, adosrption, adsorption, kinetics, mechanisms. The No value is similar to those obtained from the other equations.
La sciure de bois contient des groupements polaires tels que les hydroxyles et les carboxyles. As early as BOHART and ADAMS presented differential equations which govern the dynamics of the adsorption of vapours and gases on fixed e and the final result, applied to the liquid-solid phase, yields the kinetic adsorption rate k and the maximum adsorption capacity No eq. The point of zero charge pH PZC of sawdust. Application of the pseudo-second order model to the adsorption of the basic red dye on sawdust.
These groups consist of the sites responsible for the complex adsorption. Mohamed Zarrouki 1, 2 Details.