A D-type adsorption kinetic model for single system based on irreversible thermodynamics

Emulsion liquid membranes have been successfully used for the removal of different types of organic and inorganic pollutants by means of carrier-mediated transport mechanisms. However, the models that describe the kinetics and transport of such mechanisms are very complex due to the high number of model parameters. Starting from an analysis of the similarity between the elemental mechanisms of carrier-mediated transport in liquid membranes and of transport in adsorption processes, this paper presents an experimental analysis of the possibility of applying kinetic and mechanistic models developed for adsorption to carrier-mediated transport in emulsion liquid membranes. We study the removal of a target species, in this case, Cu(II), by emulsion liquid membranes containing membrane phase solutions of benzoylacetone (carrier agent), Span 80 (emulsifying agent) and kerosene (diluent), and hydrochloric acid as a stripping agent in the product phase. The experimental results fit the pseudo-second-order adsorption kinetic model, showing good relationships between the experimental and model parameters. Although both Cu(II) diffusion through the feed/membrane interface boundary layer and complex Cu-benzoylacetone diffusion through the membrane phase controls Cu(II) transport, it is the former step that mainly controls the transport process.

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A New Kinetic Model for Multicomponent Adsorption in Batch Systems

10.26434/chemrxiv.5899393 ◽

2018 ◽

Author(s):

yongson hong ◽

Kye-Ryong Sin ◽

Yong-U Ri ◽

Jong-Su Pak ◽

Yung Jon ◽

...

Keyword(s):

Kinetic Model ◽

Heterogeneous Reaction ◽

Nonlinear Least Squares ◽

Kinetic Studies ◽

Multicomponent Adsorption ◽

Nonlinear Fitting ◽

Batch Systems ◽

Deactivation Kinetics ◽

Adsorption Kinetic Model ◽

Component Adsorption

In many of kinetic studies on binary component adsorption, the kinetic models for unary component adsorption were used although binary adsorption process were more complex than unary ones. We proposed a new kinetic model for multicomponent adsorption in batch systems. This model, using the deactivation kinetics model(DKM) for the noncatalytic heterogeneous reaction, is represented by a set of simultaneous ordinary differential equations, the characteristic is to calculate the concentration of adsorbates and the overall deactivation degree of the adsorbent with time together. The multicomponent adsorption kinetic model was solved with ODE function of MATLAB and the kinetic parameters were estimated by the nonlinear least squares fitting. The results of nonlinear fitting to the previous experimental data show that the proposed kinetic model can be useful for kinetics modeling of multicomponent adsorption in batch systems. <br>

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Spectrophotometric Analysis of the Kinetic of Pd(II) Chloride Complex Ions Sorption Process from Diluted Aqua Solutions Using Commercially Available Activated Carbon

Archives of Metallurgy and Materials ◽

10.1515/amm-2017-0354 ◽

2017 ◽

Vol 62 (4) ◽

pp. 2405-2411 ◽

Cited By ~ 1

Author(s):

M. Wojnicki

Keyword(s):

Activated Carbon ◽

Kinetic Model ◽

Thermodynamic Parameters ◽

Kinetic Studies ◽

Sorption Process ◽

Spectrophotometric Analysis ◽

Chloride Complex ◽

Adsorption Kinetic ◽

Complex Ions ◽

Process Kinetic

AbstractIn this paper, results of adsorption kinetic studies of Pd(II) chloride complex ions on activated carbon Organosrob 10 CO are presented. Spectorphotometrical method was applied to investigate the process. Kinetic model was proposed, and fundamental thermodynamic parameters were determined. Proposed kinetic model describes well observed phenomenon in the studied range of concentration of Pd(II) chloride complex ions as well, as concentration of activated carbon.

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