Comparative study of the batch adsorption kinetics and mass transfer in phenol-sand and phenol-clay adsorption systems

2019 ◽  
Vol 38 (7) ◽  
pp. 801-811 ◽  
Author(s):  
Eugene Yakub ◽  
Samuel E. Agarry ◽  
Felix Omoruwou ◽  
Chiedu N. Owabor
Keyword(s):  
Mass Transfer ◽  
Comparative Study ◽  
Adsorption Kinetics ◽  
Batch Adsorption ◽  
Adsorption Systems

scholarly journals A Comparative Study of Fluid Flow and Mass Transfer in a Trumpet-Shaped Ladle Shroud Using Large Eddy Simulation

2015 ◽  
Vol 47 (1) ◽  
pp. 495-507 ◽  
Author(s):  
Jiangshan Zhang ◽  
Jingshe Li ◽  
Yi Yan ◽  
Zhixin Chen ◽  
Shufeng Yang ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Fluid Flow ◽  
Large Eddy Simulation ◽  
Comparative Study ◽  
Eddy Simulation ◽  
Large Eddy

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 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.

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