LAPSE:2021.0468
Published Article
LAPSE:2021.0468
A Methodology to Estimate the Sorption Parameters from Batch and Column Tests: The Case Study of Methylene Blue Sorption onto Banana Peels
Anastasia Stavrinou, Christos A. Aggelopoulos, Christos D. Tsakiroglou
May 27, 2021
In the present work, a methodology is presented where batch and fixed-bed column tests of dye sorption onto granular biosorbents are analyzed with properly selected models to estimate the parameters required for the rational design of pilot-scale units. The sorption of methylene blue (MB) onto banana peels (BP) was investigated as a case study. To identify the mechanisms of MB sorption onto BP, the pore structure and surface of BP were characterized with mercury intrusion porosimetry (MIP), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Batch tests were performed over the temperature range of 15−45 °C, and three models (Langmuir, Freundlich, Langmuir−Freundlich) were fitted to equilibrium and kinetic data for (i) estimating thermodynamic/kinetic parameters and (ii) choosing the model with the best goodness-of-fit. Sorption tests on fixed-bed columns were combined with a one-dimensional macroscopic convection/dispersion/sorption model to estimate the sorption parameters of BP beds. MB sorption onto BP was a purely exothermic (ΔH0~−20 kJ/mol), reversible, and monolayer chemisorption with high activation energy for the desorption step (Ed~29 kJ/mol) and low activation energy for the adsorption step (Ea~9 kJ/mol). The Langmuir isotherm (KL = 141.9 m3/kg, T = 25 °C) and Langmuir kinetic model (kd = 1.05 × 10−5 s−1) provided the best fitting to equilibrium and transient data of batch tests. The sorption capacity ~0.15−0.22 kg/kg and kinetic constant 0.3 × 10−5 s−1−4.0 × 10−5 s−1 estimated from tests on BP beds were comparable to those obtained from batch tests.
Keywords
Adsorption, banana peels, breakthrough curve, methylene blue, sorption models, thermodynamics
Suggested Citation
Stavrinou A, Aggelopoulos CA, Tsakiroglou CD. A Methodology to Estimate the Sorption Parameters from Batch and Column Tests: The Case Study of Methylene Blue Sorption onto Banana Peels. (2021). LAPSE:2021.0468
Author Affiliations
Stavrinou A: Foundation for Research and Technology Hellas—Institute of Chemical Engineering Sciences, Stadiou Street, Platani, 26504 Patras, Greece; Department of Physics, University of Patras, 26504 Patras, Greece
Aggelopoulos CA: Foundation for Research and Technology Hellas—Institute of Chemical Engineering Sciences, Stadiou Street, Platani, 26504 Patras, Greece [ORCID]
Tsakiroglou CD: Foundation for Research and Technology Hellas—Institute of Chemical Engineering Sciences, Stadiou Street, Platani, 26504 Patras, Greece
Journal Name
Processes
Volume
8
Issue
11
Article Number
E1467
Year
2020
Publication Date
2020-11-16
Published Version
ISSN
2227-9717
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Original Submission
Other Meta
PII: pr8111467, Publication Type: Journal Article
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LAPSE:2021.0468
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doi:10.3390/pr8111467
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May 27, 2021
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May 27, 2021
 
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Calvin Tsay
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