Analysis of commonly used batch adsorption kinetic models derived from mass transfer-based modelling

2022 ◽  
Author(s):  
Vânia Queiroz ◽  
Daniel Souza de Almeida ◽  
Gabriel Henrique de Oliveira Miglioranza ◽  
Evandro Steffani ◽  
Elisa Barbosa-Coutinho ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Kinetic Models ◽  
Adsorption Kinetic ◽  
Batch Adsorption

A New Adsorption Rate Equation in Batch Systems

2018 ◽  
Author(s):  
yongson hong ◽  
Kye-Ryong Sin ◽  
Jong-Su Pak ◽  
Chol-Min Pak
Keyword(s):  
Experimental Data ◽  
Kinetic Analysis ◽  
Adsorption Kinetics ◽  
Rate Equation ◽  
Kinetic Models ◽  
Adsorption Kinetic ◽  
Adsorption Rate ◽  
Batch Systems ◽  
New View

<p><b>In this paper, the deficiencies and cause of previous adsorption kinetic models were revealed, new adsorption rate equation has been proposed and its validities were verified by kinetic analysis of various experimental data.</b> <b>This work is a new view on the adsorption kinetics rather than a comment on the previous adsorption papers.</b></p>

scholarly journals Pore Diffusion Model for the Adsorption of Basic Dyestuffs onto Natural Clay in Batch Adsorbers

1992 ◽  
Vol 9 (2) ◽  
pp. 109-120 ◽  
Author(s):  
Mohammad S. El-Geundi
Keyword(s):  
Mass Transfer ◽  
Diffusion Coefficient ◽  
Diffusion Model ◽  
Sherwood Number ◽  
Pore Diffusion ◽  
Batch Adsorption ◽  
External Mass Transfer ◽  
Natural Clay ◽  
Pore Diffusion Model ◽  
Best Fit

The adsorption of basic dyestuffs (Basic Blue 69 and Basic Red 22) onto natural clay has been studied using a series of batch adsorption runs. The pore diffusion model (PDM) has been developed based on external mass transfer and pore diffusion to predict the performance of a batch adsorber. A computer program has been developed to generate theoretical Sherwood number-time curves and these results were adjusted to experimental Sherwood number-time curves by means of a ‘best fit’ approach. The variables of initial dye concentration and natural clay mass have been successfully correlated using a single external mass-transfer coefficient, Ks, and a single effective pore diffusion coefficient, Deff. The Ks values are 3.3 × 10−5 and 2.6 × 10−5 m/s for Basic Blue 69 and Basic Red 22, respectively. The Deff values are 7.3 × 10−10 and 9.6 × 10−10 m2/s for Basic Blue 69 and Basic Red 22, respectively.

scholarly journals Preparation and Characterization of Natural Zeolite Modified with Iron Nanoparticles

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Alvaro Ruíz-Baltazar ◽  
Rodrigo Esparza ◽  
Maykel Gonzalez ◽  
Gerardo Rosas ◽  
Ramiro Pérez
Keyword(s):  
Kinetic Models ◽  
Iron Nanoparticles ◽  
Morphological Characterization ◽  
Adsorption Kinetic ◽  
X Ray Diffraction ◽  
Modified Zeolite ◽  
X Ray ◽  
Transmission Electron ◽  
Zeolite Modification

This study is aimed at investigating the structural and morphological characterization of natural and modified zeolite obtained from the state of Oaxaca (Mexico). Iron nanoparticles were used for the zeolite modification. The iron nanoparticles were loaded on the zeolite surface by homogeneous nucleation. Adsorption kinetic models of pseudo first and second order were surveyed. The characterization of pristine and modified zeolite was performed by Fourier transform infrared (FTIR), transmission electron microscopy (TEM), and X-ray diffraction (XRD). From the results, three main phases were identified: clinoptilolite, mordenite, and feldspar. We could also determine the adsorption capacity of the zeolites by means of adsorption kinetic models.

scholarly journals Kinetic and equilibrium study of the removal of reactive dye using modified walnut shell

2019 ◽  
Vol 80 (5) ◽  
pp. 874-883 ◽  
Author(s):  
Shenmaishang Li ◽  
Zuoxiang Zeng ◽  
Weilan Xue
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Adsorption Capacity ◽  
Diffusion Mechanism ◽  
Aqueous Media ◽  
Reactive Dye ◽  
Walnut Shell ◽  
Batch Adsorption ◽  
Surface Mass

Abstract Modified walnut shell (EAWNS) was prepared by reaction with epichlorohydrin and alkaline solution of aspartic acid and used to remove reactive dye (Reactive Brilliant Blue (KN-R)) from aqueous media. The isotherms, kinetics and thermodynamics of KN–R adsorption onto EAWNS were studied at 298–318 K. The isotherm data of KN–R adsorption onto EAWNS agreed closely with the Langmuir model. The theoretical monolayer adsorption capacity for KN–R was 224.42 mg/g at 318 K. The result from the Dubinin–Radushkevich model showed that the KN–R adsorption onto EAWNS is chemisorption. The adsorption rate of KN–R onto EAWNS conformed to the pseudo-second-order model. The diffusion mechanism was investigated by the intraparticle diffusion model. The mass-transfer coefficient calculated by the surface mass-transfer coefficient model was in range of 2.95 × 10−5 to 2.93 × 10−4cm/s. The thermodynamic results suggested that the adsorption of KN–R onto EAWNS is spontaneous and endothermic in nature. The design of a single-stage batch adsorption process based on EAWNS adsorbent was carried out. Furthermore, the recycled EAWNS maintains high adsorption capacity despite four cycles.

scholarly journals Adsorption kinetic models of heavy metal ions on granular activated carbon

2015 ◽  
Vol 56 (2) ◽  
pp. 179-190 ◽  
Author(s):  
Aleksandra Porjazoska-Kujundziski ◽  
Liljana Markovska ◽  
Verka Meshko
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Metal Ions ◽  
Kinetic Models ◽  
Heavy Metal Ions ◽  
Granular Activated Carbon ◽  
Adsorption Kinetic

scholarly journals Thermodynamic and kinetic models for the removal of copper and cadmium using industrial effluents by mixed adsorbent

YMER Digital ◽  
2021 ◽  
Vol 20 (10) ◽  
pp. 87-99
Author(s):  
K S R Murthy ◽  
Srinivas Tadepalli
Keyword(s):  
Kinetic Models ◽  
Activated Charcoal ◽  
Dynamic Equilibrium ◽  
Copper Ions ◽  
Low Cost ◽  
Industrial Effluents ◽  
Batch Adsorption ◽  
Bone Charcoal ◽  
Synthetic Metal ◽  
Gibb’S Free Energy

The potential of Activated Charcoal and bone Charcoal as a low cost material for the removal of copper and cadmium from synthetic metal solution was studied. A number of experiments were performed in order to determine the potential capacity of the adsorbent in terms of thermo Dynamic equilibrium from the batch data. The Positive values of change in Enthalpy show that the process is endothermic in nature for Cd (II) and the negative values of Change in Enthalpy shows that the process is exothermic in nature for Cu (II). The standard Gibb’s free energy values are positive which means that the process is not spontaneous in nature. The negative values of ΔS show that there is decrease in randomness at the solid/solution interface during the adsorption of copper. The study revealed that mixed adsorbent prepared by blending the activated charcoal and bone charcoal in 1: 1 ratio has more potential to act as an adsorbent for the removal of Cu and Cd from aqueous solution. The optimum temperature was found to be 40°C for both the metals. The higher correlation coefficient R2(0.9824) value shown that cadmium ions were well fitted the thermodynamic model comparing copper ions. The batch adsorption studies have been carried out for 2 hrs considering all the 6 parameters by optimizing each of them. The data obtained for optimized parameters were studied through fitting of kinetic models such as Pseudo-first order and Pseudo second order models for both Copper and Cadmium along with Correlation or regression coefficient (R2) values.

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