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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Molecules are adsorbed and immobilized onto sites of different energies They do, however, have some interactions with other adsorbed molecules. Revue des sciences de l’eau 24, n o 2 Effect of contact time on the adsorption of the basic red dye on sawdust.
Adsorption isotherm of the basic red dye on sawdust. 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. Application of the Langmuir model to the adsorption of the basic red dye on sawdust. Tuesday, October 23, – 2: Their is good agreement. 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.
Étude cinétique et thermodynamique de l’adsorptio… – Revue des sciences de l’eau – Érudit
Kinetic modeling of the adsorption of basic dyes by kudzu. Adsorption study in a solid system: From the difference in the area of the two curves, it is possible to calculate the supplementary biological degradation. 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.
Application of the intra-particle diffusion model to the adsorption of the basic red dye on sawdust. The linearized Clark equation 16 gives a good representation of experimental results fig. 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.
Have you forgotten your login? The activated carbon efficiency No can be estimated and the adsorption rate constant calculated from the slope and the y-intercept.
These groups consist of the sites responsible for the complex adsorption. Basic red dye, sawdust, adsorption, kinetics, mechanisms.
Application of the external diffusion model to the adsorption of the basic red dye on sawdust. Revue des sciences de l’eau24 2— The kinetics, thermodynamics and isotherms of the adsorption were used to identify the retention mechanisms. Effect of the sawdust dosage on the adsorption of the basic red dye in aqueous solution.
Revue des sciences de l’eau6 163— These methods have given information about the nature of the functional groups which are on the surface of the activated carbon. Mohamed Zarrouki 1, 2 AuthorId: With a gas-liquid-solid treatment, we have modified the nature and the distribution of the sites on the activated carbon surface. The aim of this work is to study the recovery of precious metals by complexing them with a suitable reagent.
By transposition to the liquid phase, we have calculated the concentration distribution in the bed eq. The model developed by CLARK is based on the use of e mass-transfer concept in combination with the Freundlich isotherm fig.
The chemical surface reaction was fitted to a pseudo-second order equation, with very high regression coefficients.
This has allowed us to understand the fundamental mechanism of adsorption in a model system which consists of a solution of dicyanoaurate ions and activated carbon. The kinetic coefficient Sa, and the maximum capacity adsorption No are shown in table 1. Values of the kinetic constants for the adsorption of the basic red dye on sawdust.
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. The No value is similar to those obtained from the other equations.
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 thfses No eq.
Activated carbon-dicyanoaurate ion solution. The agreement is only for the low values of C in the break-through curves.
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Mohamed Zarrouki 1, 2 Details. Tuesday, July 16, – 2: The interactions between this solution and the solid were characterized by several methods: The Freundlich isotherm equation fig. 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.
Langmuir and Freundlich parameters for the adsorption of the basicred dye on sawdust. 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. With the use of the two parameters, the break-through curves have been recalculated fig.
B value can be determined with the different columns fig. Effect of pH on the adsorption of the basic red dye on sawdust. La sciure de bois contient des groupements polaires tels que les hydroxyles et les carboxyles. The linear flow rates were 3.