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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Revue des sciences de l’eau24 2— The Freundlich isotherm equation fig. The aim of thesee work is to study the recovery of precious metals by complexing them with a suitable reagent. The adsorption rate of the dicyanoaurate ion onto the activated carbon was studied as a function of several thesed parameters: Thermodynamic parameters for 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
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.
Langmuir and Freundlich parameters for the adsortion of the basicred dye on sawdust. Kinetic modeling of the adsorption of basic dyes by kudzu.
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.
Mohamed Zarrouki 1, 2 AuthorId: The use of this model is facilitated by our linearization and the case of particular phenomena: Have you forgotten your login? 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 chrabon 10 first centimeters.
Tuesday, July 16, – 2: Revue des sciences de l’eau6 163— Their is good agreement.
The coefficients A and B table 1 are determined from the straight lines obtained with the low break-curve concentrations fig. 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.
The A parameter is related to the depth Z of the adsorbant: Effect of the sawdust dosage on the adsorption of the basic red dye in aqueous solution.
Étude cinétique et thermodynamique de l’adsorptio… – Revue des sciences de l’eau – Érudit
The No value is similar to those obtained from the other equations. 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.
By transposition to the liquid phase, we have calculated the concentration distribution in the bed eq. Wednesday, April 5, – In conclusion, nome of the tested models lead to different parameters by using low break-through curve concentrations rn 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 model developed by CLARK is based on the use of e mass-transfer concept in combination with the Freundlich isotherm fig. Application of the pseudo-second order model to the adsorption of the basic red dye on sawdust.
The chemical surface reaction was fitted to a pseudo-second order equation, with very high regression coefficients. Tuesday, October 23, – 2: 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. The general equation is equation The interactions between this solution and the solid were characterized by several methods: Solution d’ion dicyanoaurate-charbon actif.
The activated carbon efficiency No can be estimated and the adsorption rate constant calculated from the slope aesorption the y-intercept. These groups consist of the sites responsible for the complex adsorption.
Adsorption study in a solid system: B value can be determined with the different columns fig. This modification depends on the nature and pressure of the gas used.