Experimental and Numerical modeling on dye adsorption using pyrolyzed mesoporous biochar in Batch and fixed-bed column reactor: Isotherm, Thermodynamics, Mass transfer, Kinetic analysis

2021 ◽  
Vol 23 ◽  
pp. 100985 ◽  
Author(s):  
Lopamudra Das ◽  
Saptarshi Sengupta ◽  
Papita Das ◽  
Avijit Bhowal ◽  
Chiranjib Bhattacharjee
Keyword(s):  
Mass Transfer ◽  
Numerical Modeling ◽  
Kinetic Analysis ◽  
Fixed Bed ◽  
Dye Adsorption ◽  
Fixed Bed Column ◽  
Column Reactor ◽  
Mesoporous Biochar ◽  
Mass Transfer Kinetic ◽  
Experimental And Numerical Modeling

Simultaneous Bromate and Nitrate Reduction in Water Using Sulfur-Utilizing Autotrophic and Mixotrophic Denitrification Processes in a Fixed Bed Column Reactor

2014 ◽  
Vol 42 (9) ◽  
pp. 1185-1189 ◽  
Author(s):  
Sevgi Demirel ◽  
İbrahim Uyanık ◽  
Adem Yurtsever ◽  
Hakan Çelikten ◽  
Deniz Uçar
Keyword(s):  
Nitrate Reduction ◽  
Fixed Bed ◽  
Fixed Bed Column ◽  
Column Reactor

scholarly journals Continuous Fixed-Bed Column Studies on Congo Red Dye Adsorption-Desorption Using Free and Immobilized Nelumbo nucifera Leaf Adsorbent

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 54
Author(s):  
Vairavel Parimelazhagan ◽  
Gautham Jeppu ◽  
Nakul Rampal
Keyword(s):  
Congo Red ◽  
Agricultural Waste ◽  
Fixed Bed ◽  
Dye Adsorption ◽  
Nelumbo Nucifera ◽  
Substantial Contribution ◽  
Flow Mode ◽  
Waste Biomass ◽  
Column Studies ◽  
Fixed Bed Column

The adsorption of Congo red (CR), an azo dye, from aqueous solution using free and immobilized agricultural waste biomass of Nelumbo nucifera (lotus) has been studied separately in a continuous fixed-bed column operation. The N. nucifera leaf powder adsorbent was immobilized in various polymeric matrices and the maximum decolorization efficiency (83.64%) of CR occurred using the polymeric matrix sodium silicate. The maximum efficacy (72.87%) of CR dye desorption was obtained using the solvent methanol. Reusability studies of free and immobilized adsorbents for the decolorization of CR dye were carried out separately in three runs in continuous mode. The % color removal and equilibrium dye uptake of the regenerated free and immobilized adsorbents decreased significantly after the first cycle. The decolorization efficiencies of CR dye adsorption were 53.66% and 43.33%; equilibrium dye uptakes were 1.179 mg g–1 and 0.783 mg g–1 in the third run of operation with free and immobilized adsorbent, respectively. The column experimental data fit very well to the Thomas and Yoon–Nelson models for the free and immobilized adsorbent with coefficients of correlation R2 ≥ 0.976 in various runs. The study concludes that free and immobilized N. nucifera can be efficiently used for the removal of CR from synthetic and industrial wastewater in a continuous flow mode. It makes a substantial contribution to the development of new biomass materials for monitoring and remediation of toxic dye-contaminated water resources.

Adsorptive Removal of Pentachlorophenol by Anthracophyllum discolor in a Fixed-Bed Column Reactor

2011 ◽  
Vol 223 (5) ◽  
pp. 2463-2472 ◽  
Author(s):  
Olga Rubilar ◽  
Gonzalo R. Tortella ◽  
Raphael Cuevas ◽  
Mara Cea ◽  
Susana Rodríguez-Couto ◽  
...  
Keyword(s):  
Fixed Bed ◽  
Fixed Bed Column ◽  
Column Reactor ◽  
Adsorptive Removal

Applications of dye adsorption in fixed bed column and modeling studies

2021 ◽  
Vol 222 ◽  
pp. 209-218
Author(s):  
Muhammed Onay ◽  
Çiğdem Sarıcı Özdemir
Keyword(s):  
Fixed Bed ◽  
Dye Adsorption ◽  
Fixed Bed Column ◽  
Modeling Studies

PEMBUATAN PUPUK ORGANIK CAIR DARI KOTORAN SAPI MENGGUNAKAN KOLOM FIXED BED SECARA KONTINYU

EKUILIBIUM ◽  
2012 ◽  
Vol 11 (2) ◽  
Author(s):  
Paryanto Paryanto
Keyword(s):  
Mass Transfer ◽  
Particle Size ◽  
Soil Degradation ◽  
Organic Fertilizer ◽  
Fixed Bed ◽  
Cow Manure ◽  
Volumetric Mass Transfer Coefficient ◽  
Fixed Bed Column ◽  
A Value ◽  
Bed Height

<p><strong><em>Abstract:</em></strong><em> Nowadays, organic fertilizer is more interesting than anorganic fertilizer, because it doesn’t cause soil degradation and the crops are healthier to be consumed. Manure is the most familiar as an organic fertilizer. This study dealt with producing of liquid organic fertilizer from cow manure in fixed bed column reactor. The reactor operated at 30 <sup>o</sup>C, 40 cmHg and 19.2 mL/s of solvent flowrate. The aim of this study was to find correlation between bed height of manure in column, particle size of manure, concentration of fertilizer and volumetric mass transfer coefficient </em>(<em>k<sub>c</sub>a</em>)<em>. The highest of k<sub>c</sub>a value was obtained at 25 cm of bed height, it was 0.0014 s<sup>-1</sup>. The result shows that bed height of manure is linier to k<sub>c</sub>a. On the other hand, particle size of manure doesn’t give much influence of k<sub>c</sub>a.</em></p><p><strong><em> </em></strong><strong><em>Keywords</em></strong><strong>:</strong><em> extraction, fixed bed, cow manure, liquid organic fertilizer, volumetric mass transfer </em><em>coefficient</em></p>

Evaluation of metal hydroxide sludge for reactive dye adsorption in a fixed-bed column system

2004 ◽  
Vol 38 (1) ◽  
pp. 71-78 ◽  
Author(s):  
S. Netpradit ◽  
P. Thiravetyan ◽  
S. Towprayoon
Keyword(s):  
Fixed Bed ◽  
Dye Adsorption ◽  
Reactive Dye ◽  
Metal Hydroxide ◽  
Fixed Bed Column ◽  
Column System

scholarly journals Dynamic studies of nitrophenols sorption on perfil in a fixed-bed column

2008 ◽  
Vol 27 (2) ◽  
pp. 123 ◽  
Author(s):  
Zvezdelina Yaneva ◽  
Mirko Marinkovski ◽  
Liljana Markovska ◽  
Vera Meshko ◽  
Bogdana Koumanova
Keyword(s):  
Mass Transfer ◽  
Diffusion Coefficient ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Dispersion Coefficient ◽  
Fixed Bed ◽  
External Mass Transfer ◽  
Fixed Bed Column ◽  
Axial Dispersion Coefficient ◽  
Solid Diffusion

The adsorption of two substituted nitrophenols, namely 4-nitrophenol (4-NP) and 2,4-dinitrophenol (2,4-DNP), from aqueous solutions onto perfil was studied using a fixed bed column. The theoretical solid diffusion control (SDC) model describing single solute adsorption in a fixed bed based on the Linear Driving Force (LDF) kinetic model was successfully applied to the investigated systems. The model parameters of solid diffusion coefficient, DS, axial dispersion coefficient, DL, and external mass transfer coefficient, kf, for the investigated systems were estimated by the means of a best fit approach. Some deviations were found between the predicted and the experimental data which reflect the fact that the assumptions of the model were not quite fulfilled for these experiments. It is necessary to adjust the values of the solid diffusion coefficient, the axial dispersion coefficient and the external mass transfer coefficient in order to obtain a satisfactory agreement between the simulated and the experimental breakthrough curves. A Biot number was used as an indicator for the intarparticle diffusion. The Biot number was found to decrease with the increase of bed depth, indicating that the film resistance increased or the intraparticle diffusion resistance decreased.

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