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Dehbi A, Dehmani Y, Franco DSP, Omari H, Georgin J, Brahmi Y, Elazhari K, Messaoudi M, Aadnan I, Lamhasni T, Alrashdi AA, Abdallaoui A, Abouarnadasse S, Lamini A. A Statistical Physics Approach to Understanding the Adsorption of Methylene Blue onto Cobalt Oxide Nanoparticles. Molecules 2024; 29:412. [PMID: 38257326 PMCID: PMC10818394 DOI: 10.3390/molecules29020412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 11/16/2023] [Accepted: 12/04/2023] [Indexed: 01/24/2024] Open
Abstract
The production of cobalt oxide nanoparticles and their use in the adsorption of methylene blue (MB) from solution is described in the paper. The X-ray diffraction patterns show that the synthesized cobalt oxide nanoparticles have a crystalline cubic structure. The study of the adsorption of methylene blue onto the cobalt oxide nanoparticles involved determining the contact time and initial concentration of the adsorption of MB on the adsorbent. The kinetics of adsorption were analyzed using two kinetic models (pseudo-first order and pseudo-second order), and the pseudo-second-order model was found to be the most appropriate for describing the behavior of the adsorption. This study indicates that the MLTS (monolayer with the same number of molecules per site) model is the most suitable model for describing methylene blue/cobalt oxide systems, and the parameter values help to further understand the adsorption process with the steric parameters. Indicating that methylene blue is horizontally adsorbed onto the surface of the cobalt oxide, which is bonded to two different receptor sites. Regarding the temperature effect, it was found that the adsorption capacity increased, with the experimental value ranging from 313.7 to 405.3 mg g-1, while the MLTS predicted 313.32 and 408.16 mg g-1. From the thermodynamic functions, high entropy was found around 280 mg L-1 concentration. For all concentrations and temperatures examined, the Gibbs free energy and enthalpy of adsorption were found to be negative and positive, respectively, suggesting that the system is spontaneous and endothermic. According to this study's findings, methylene blue adsorption onto cobalt oxide nanoparticles happens via the creation of a monolayer, in which the same amount of molecules are adsorbed at two distinct locations. The findings shed light on the methylene blue adsorption process onto cobalt oxide nanoparticles, which have a variety of uses, including the remediation of wastewater.
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Affiliation(s)
- Ali Dehbi
- Laboratory of Chemistry/Biology Applied to the Environment, Faculty of Sciences, Moulay Ismail University, Meknes 50070, Morocco; (A.D.); (H.O.); (K.E.); (A.A.); (S.A.)
| | - Younes Dehmani
- Laboratory of Chemistry/Biology Applied to the Environment, Faculty of Sciences, Moulay Ismail University, Meknes 50070, Morocco; (A.D.); (H.O.); (K.E.); (A.A.); (S.A.)
| | - Dison S. P. Franco
- Department of Civil and Environmental, Universidad de la Costa, CUC, Calle 58 # 55–66, Barranquilla 50366, Colombia;
| | - Hind Omari
- Laboratory of Chemistry/Biology Applied to the Environment, Faculty of Sciences, Moulay Ismail University, Meknes 50070, Morocco; (A.D.); (H.O.); (K.E.); (A.A.); (S.A.)
| | - Jordana Georgin
- Department of Civil and Environmental, Universidad de la Costa, CUC, Calle 58 # 55–66, Barranquilla 50366, Colombia;
| | - Younes Brahmi
- HTMR-Lab, Mohammed VI Polytechnic University (UM6P), Ben Guerir 43150, Morocco
| | - Kaoutar Elazhari
- Laboratory of Chemistry/Biology Applied to the Environment, Faculty of Sciences, Moulay Ismail University, Meknes 50070, Morocco; (A.D.); (H.O.); (K.E.); (A.A.); (S.A.)
| | - Mohammed Messaoudi
- Laboratory of Materials, Membranes and Nanotechnology, Department of Chemistry, Faculty of Sciences, Moulay Ismail University, Meknes 50070, Morocco;
| | - Imane Aadnan
- Laboratory of Chemistry/Biology Applied to the Environment, Faculty of Sciences, Moulay Ismail University, Meknes 50070, Morocco; (A.D.); (H.O.); (K.E.); (A.A.); (S.A.)
| | - Taibi Lamhasni
- Institut National des Sciences de l’Archéologie et du Patrimoine (INSAP), BP 6828, Madinat al Irfane, Avenue Allal El-Fassi, Angle rues 5 et 7, Rabat 10000, Morocco;
| | - Awad A. Alrashdi
- Chemistry Department, Al-Qunfudah University College, Umm Al-Qura University, Mecca 24382, Saudi Arabia
| | - Abdelaziz Abdallaoui
- Laboratory of Chemistry/Biology Applied to the Environment, Faculty of Sciences, Moulay Ismail University, Meknes 50070, Morocco; (A.D.); (H.O.); (K.E.); (A.A.); (S.A.)
| | - Sadik Abouarnadasse
- Laboratory of Chemistry/Biology Applied to the Environment, Faculty of Sciences, Moulay Ismail University, Meknes 50070, Morocco; (A.D.); (H.O.); (K.E.); (A.A.); (S.A.)
| | - Adil Lamini
- Laboratory of Chemistry/Biology Applied to the Environment, Faculty of Sciences, Moulay Ismail University, Meknes 50070, Morocco; (A.D.); (H.O.); (K.E.); (A.A.); (S.A.)
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Smati H, Torkia YB, Khemis IB, Aouaini F, Lamine AB. Modeling by statistical physics and interpretation of the olfactory process of the two enantiomers 3-mercapto-2-methylbutan-1-ol and 3-mercapto-2-methylpentan-1-ol on the OR2M3 human olfactory receptor. Int J Biol Macromol 2023:124896. [PMID: 37268074 DOI: 10.1016/j.ijbiomac.2023.124896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 05/11/2023] [Accepted: 05/12/2023] [Indexed: 06/04/2023]
Abstract
In the present paper, a putative adsorption process of two odorants thiols (3-mercapto-2-methylbutan-1-ol and 3-mercapto-2-methylpentan-1-ol) on the human olfactory receptor OR2M3 has been investigated via advanced models developed by a grand canonical formalism of statistical physics. For the two olfactory systems, a monolayer model with two types of energy (ML2E) has been selected to correlate with the experimental data. The physicochemical analysis of the statistical physics modeling results showed that the adsorption system of the two odorants was multimolecular. Furthermore, the molar adsorption energies were inferior to 22.7 kJ/mol, which confirmed the physisorption process of the adsorption of the two odorant thiols on OR2M3. In addition, quantitative characterizations of both odorants were determined via the olfactory receptor pore size distribution (RPSD) and the adsorption energy distribution (AED), which were spread out from 0.25 to 1.25 nm and from 5 to 35 kJ/mol, respectively. For thermodynamic characterization of the olfactory process, the adsorption entropy indicated the disorder of the adsorption systems of 3-mercapto-2-methylbutan-1-ol and 3-mercapto-2-methylpentan-1-ol on the human olfactory receptor OR2M3. Besides, the used model showed that the presence of copper ions increases the efficacy (olfactory response at saturation) of 3-mercapt-2-methylpentan-1-ol odorant activating OR2M3. The docking molecular simulation indicated that the 3-mercapto-2-methylpentan-1-ol molecule presented more binding affinities (17.15 kJ/mol) with olfactory receptor OR2M3 than 3-mercapto-2-methylbutan-1-ol (14.64 kJ/mol). On the other hand, the two estimated binding affinities of the two odorants belonged to the adsorption energies spectrum (AED) to confirm the physisorption nature of the olfactory adsorption process.
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Affiliation(s)
- Houda Smati
- Laboratory of Quantum and Statistical Physics LR 18 ES 18, University of Monastir, Faculty of Sciences of Monastir, Environnement Street, 5019 Monastir, Tunisia
| | - Yosra Ben Torkia
- Laboratory of Quantum and Statistical Physics LR 18 ES 18, University of Monastir, Faculty of Sciences of Monastir, Environnement Street, 5019 Monastir, Tunisia.
| | - Ismahene Ben Khemis
- Laboratory of Quantum and Statistical Physics LR 18 ES 18, University of Monastir, Faculty of Sciences of Monastir, Environnement Street, 5019 Monastir, Tunisia.
| | - Fatma Aouaini
- Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Abdelmottaleb Ben Lamine
- Laboratory of Quantum and Statistical Physics LR 18 ES 18, University of Monastir, Faculty of Sciences of Monastir, Environnement Street, 5019 Monastir, Tunisia.
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Alves MO, Ortega PFR, Carvalho FS, Braga JP. Modelling the adsorption on oxidized carbon nanotubes using a statistical mechanics approach. J Mol Model 2022; 28:318. [DOI: 10.1007/s00894-022-05307-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 08/30/2022] [Indexed: 10/14/2022]
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Jethave G, Fegade U, Siddiqui MFA, Ahamed MI, Suryawanshi KE. Adsorption of hexamethyl pararosaniline chloride dye on MgO‐PbFe
2
O
4
: Experimental study and statistical physics modeling via double‐layer model. INT J CHEM KINET 2022. [DOI: 10.1002/kin.21600] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ganesh Jethave
- Department of Chemistry Dr. Annasaheb G. D. Bendale Mahila Mahavidyalaya Jalgaon Maharashtra India
| | - Umesh Fegade
- Department of Applied Science & Humanities R.C. Patel Institute of Technology Districts Dhule Shirpur Maharashtra India
| | - Mohd Faizan Alam Siddiqui
- Department of Chemistry Bhusawal Arts, Science and P. O. Nahata Commerce College Bhusawal Maharashtra India
| | - Mohd Imran Ahamed
- Department of Chemistry Faculty of Science Aligarh Muslim University Aligarh India
| | - Kiran E. Suryawanshi
- Department of Chemistry Faculty of Science Aligarh Muslim University Aligarh India
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Jethave G, Fegade U, Inamuddin, Altalhi T, Khan MF, Barhate B, Suryawanshi KE, Isai KA. Adsorption of Congo Red dye on CuO nanoparticles synthesized by green method using
Nyctanthes arbor‐tristis
leaf extract: Experimental and theoretical study. INT J CHEM KINET 2022. [DOI: 10.1002/kin.21591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Ganesh Jethave
- Department of Chemistry Dr. Annasaheb G. D. Bendale Mahila Mahavidyalaya Jalgaon Maharashtra India
| | - Umesh Fegade
- Department of Chemistry Bhusawal Arts Science and P. O. Nahata Commerce College Bhusawal Maharashtra India
| | - Inamuddin
- Department of Applied Chemistry Zakir Husain College of Engineering and Technology Faculty of Engineering and Technology Aligarh Muslim University Aligarh India
| | - Tariq Altalhi
- Department of Chemistry College of Science Taif University Taif Saudi Arabia
| | - Mohd. Farhan Khan
- Department of Science Gagan College of Management and Technology Aligarh India
| | - Bhojraj Barhate
- Department of Computer Science Bhusawal Arts Science and P. O. Nahata Commerce College Bhusawal Maharashtra India
| | - Kiran E. Suryawanshi
- Department of Applied Science and Humanities R. C. Patel Institute of Technology Shirpur Maharashtra India
| | - Kalpesh A. Isai
- Department of Applied Science and Humanities R. C. Patel Institute of Technology Shirpur Maharashtra India
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Franco DS, Georgin J, Netto MS, da Boit Martinello K, Silva LF. Preparation of activated carbons from fruit residues for the removal of naproxen (NPX): Analytical interpretation via statistical physical model. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Statistical modeling and interpretation of Sono-assisted adsorption mechanism of Crystal Violet dye on FeTiPbO Nanocomposite. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116878] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Bouaziz N, Ben Manaa M, Bouzid M, Ben Lamine A. Adsorption of hydrogen in defective carbon nanotube: modelling and consequent investigations using statistical physics formalism. Mol Phys 2019. [DOI: 10.1080/00268976.2019.1606460] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Nadia Bouaziz
- Department of Physics, Faculty of Science of Monastir, Monastir, Tunisia
| | - Marwa Ben Manaa
- Department of Physics, Faculty of Science of Monastir, Monastir, Tunisia
| | - Mohamed Bouzid
- Department of Physics, Faculty of Science of Monastir, Monastir, Tunisia
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Baouab MHV, Khalfaoui M, Bartegi A, Gauthier R. Immobilization of Residual Basic Dyes onto Polyamide Ion-Exchanger Materials. ADSORPT SCI TECHNOL 2016. [DOI: 10.1260/026361705775212439] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
This paper reports the preparation of methacrylic acid-grafted nylon (MAA—nylon) by treating nylon-6,6 fibres with methacrylic acid (MAA) and the use of this modified polyamide as an ion-exchanger for the immobilization of pollutant basic dyes. The grafting of MAA onto nylon-6,6 was demonstrated both by weight uptake and atomic force microscopy. The exchange capacity of MAA—nylon was evaluated by potentiometric titration of the acidic groups. Five MAA—nylon fibres with different degrees of grafting (20–80%) were tested for the adsorption of two basic dyes, viz. Basic Blue 3 and Basic Red 24. Such adsorption was monitored by visible spectroscopy. The adsorption capacity was found to depend on the degree of grafting and on the temperature. The experimental data were fitted using the Langmuir and Freundlich models. However, an improved fit could be obtained by using the Jossens model.
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Affiliation(s)
- Mohamed Hassen V Baouab
- Institut Préparatoire aux Etudes d'Ingénieurs de Monastir, Avenue de l'Environnement, 5019 Monastir, Tunisia
- Laboratoire de Biochimie et Environnement, Institut Supérieur de Biotechnologie, 5019 Monastir, Tunisia
| | - Mohamed Khalfaoui
- Laboratoire de Physique Quantique, Faculté des Sciences de Monastir, 5019 Monastir, Tunisia
| | - Aghleb Bartegi
- Laboratoire de Biochimie et Environnement, Institut Supérieur de Biotechnologie, 5019 Monastir, Tunisia
| | - Robert Gauthier
- Laboratoire des Matériaux Polymères et Biomatériaux, UMR CNRS No. 5627, UCB Lyon 1, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne-Cedex, France
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Dotto G, Pinto L, Hachicha M, Knani S. New physicochemical interpretations for the adsorption of food dyes on chitosan films using statistical physics treatment. Food Chem 2015; 171:1-7. [DOI: 10.1016/j.foodchem.2014.08.098] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 07/22/2014] [Accepted: 08/22/2014] [Indexed: 10/24/2022]
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12
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Nakhli A, Khalfaoui M, Aguir C, Bergaoui M, M’henni MF, Ben Lamine A. Statistical Physics Studies of Multilayer Adsorption on Solid Surface: Adsorption of Basic Blue 41 Dye onto FunctionalizedPosidoniaBiomass. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2014.929703] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Khalfaoui M, Nakhli A, Aguir C, Omri A, M'henni MF, Ben Lamine A. Statistical thermodynamics of adsorption of dye DR75 onto natural materials and its modifications: double-layer model with two adsorption energies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:3134-44. [PMID: 24203257 DOI: 10.1007/s11356-013-2263-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 10/21/2013] [Indexed: 05/18/2023]
Abstract
In this article, adsorption modelling was presented to describe the sorption of textile dye, Direct Red 75 (DR75), from coloured wastewater onto the natural and modified adsorbent, Posidonia oceanica. The formulation of the double-layer model with two energy levels was based on statistical physics and theoretical considerations. Thanks to the grand canonical ensemble in statistical physics some physico-chemical parameters related to the adsorption process were introduced in the analytical model expression. Fitting results show that the dye molecules are adsorbed in parallel position to the adsorbent surface. The magnitudes of the calculated adsorption energies show that the DR75 dye is physisorbed onto Posidonia. Both Van der Waals and hydrogen interactions are implicated in the adsorption process. Despite its simplicity, the model fits a wide range of experimental data, thereby supporting the underlying data that the grafted groups facilitate the parallel anchorage of the anionic dye molecule. Thermodynamic parameters, such as adsorption energy, entropy, Gibbs free adsorption energy and internal energy were calculated according to the double-layer model. Results suggested that the DR75 adsorption onto Posidonia was a spontaneous and exothermic process.
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Affiliation(s)
- M Khalfaoui
- Quantum Physics Laboratory, Faculty of Sciences of Monastir, University of Monastir, Monastir, 5000, Tunisia,
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Khalfaoui M, Nakhli A, Knani S, Baouab HV, Ben Lamine A. On the statistical physics modeling of dye adsorption onto anionized nylon: Consequent new interpretations. J Appl Polym Sci 2011. [DOI: 10.1002/app.34664] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Chadlia A, Mohamed K, Najah L, Farouk MM. Preparation and characterization of new succinic anhydride grafted Posidonia for the removal of organic and inorganic pollutants. JOURNAL OF HAZARDOUS MATERIALS 2009; 172:1579-1590. [PMID: 19733964 DOI: 10.1016/j.jhazmat.2009.08.030] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2009] [Revised: 08/05/2009] [Accepted: 08/07/2009] [Indexed: 05/28/2023]
Abstract
The present work describes the preparation of new chelating materials derived from Posidonia for adsorption of heavy metal ions and dye in aqueous solution. The first part of this report deals with the chemical modification of Posidonia with succinic anhydride. Thus, we have obtained materials with various succinyl groups contents (from 29.8 to 39.2%). The obtained materials were characterized by infrared and CP/MAS (13)C-RMN spectroscopy. The rate of succinyl content of the modified Posidonia was determined by saponification. The second part is devoted to the evaluation of the adsorption capacity of metal ions such as Pb(2+) and dye such as direct red 75 (DR75) for raw and modified Posidonia materials. Two possible ways for the adsorption of these pollutants are studied: adsorption of each pollutant alone onto these supports, and cumulative adsorption of both metal ions and dye on the same supports. In the last case, the pollutant is adsorbed successively from two different solutions. The effects of pollutants concentration, support dose, pH, contact time and temperature on adsorption of each pollutant were evaluated. The results showed that the raw and modified Posidonia show a high capacity for Pb(2+) adsorption. The capacity of modified Posidonia saturated with Pb(2+) to adsorb DR75 was found 147.12 mg g(-1). While the adsorption capacity of the nonsaturated modified Posidonia was equal to 81.63 mg g(-1). The pseudo-second-order model was the best to represent adsorption kinetics of DR75. The pseudo-first-order model would be better for fitting the adsorption kinetic process of Pb(2+) onto raw and modified Posidonia. The adsorption isotherms of Pb(2+) could be described by the Jossens equation model. Any of the tested models can describe the adsorption of DR75 onto the studied materials. These results confirm that the adsorption of DR75 from aqueous solution was multilayer.
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Affiliation(s)
- Aguir Chadlia
- Unité de Recherche de Chimie Appliquée et Environnement, Faculté des Sciences de Monastir, Tunisia.
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Khalfaoui M, Baouab MHV, Gauthier R, Ben Lamine A. Acid dye adsorption onto cationized polyamide fibres. Modeling and consequent interpretations of model parameter behaviours. J Colloid Interface Sci 2006; 296:419-27. [PMID: 16256129 DOI: 10.1016/j.jcis.2005.09.030] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2005] [Revised: 09/15/2005] [Accepted: 09/16/2005] [Indexed: 11/19/2022]
Abstract
Experimental adsorption isotherms of four acid dyes named Acid Blue 25, Acid Yellow 99, Reactive Yellow 23, and Acid Blue 74 from aqueous solution onto cationized nylon-6,6 have been analyzed using a double layer adsorption model. The parameters involved in the analytical expression of this model such as the number or fraction of adsorbed dye molecule per site, n, the number of receptor sites per gram of adsorbent, N(M), and the concentration at half-saturation, c1/2, are determined from adsorption isotherms at four temperatures between 293 and 353 K. The evolution of these parameters with temperature is discussed in relation with adsorption process and the behaviours of the different dyes taking into account their particular structure. The results are compared with those already published dealing with the adsorption of these same dyes onto cationized cotton. The configurational entropy at various temperatures has been studied. This parameter allowed to deduce some results related to the evolution of the disorder during the adsorption process.
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Affiliation(s)
- M Khalfaoui
- Laboratoire de Physique Quantique, Département de Physique Faculté des Sciences de Monastir, 5000 Monastir, Tunisia
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Khalfaoui M, Knani S, Hachicha MA, Lamine AB. New theoretical expressions for the five adsorption type isotherms classified by BET based on statistical physics treatment. J Colloid Interface Sci 2003; 263:350-6. [PMID: 12909023 DOI: 10.1016/s0021-9797(03)00139-5] [Citation(s) in RCA: 150] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
New theoretical expressions to model the five adsorption isotherm types have been established. Using the grand canonical ensemble in statistical physics, we give an analytical expression to each of five physical adsorption isotherm types classified by Brunauer, Emett, and Teller, often called BET isotherms. The establishment of these expressions is based on statistical physics and theoretical considerations. This method allowed estimation of all the mathematical parameters in the models. The physicochemical parameters intervening in the adsorption process that the models present could be deduced directly from the experimental adsorption isotherms by numerical simulation. We determine the adequate model for each type of isotherm, which fixes by direct numerical simulation the monolayer, multilayer, or condensation character. New equations are discussed and results obtained are verified for experimental data from the literature. The new theoretical expressions that we have proposed, based on statistical physics treatment, are rather powerful to better understand and interpret the various five physical adsorption type isotherms at a microscopic level.
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Affiliation(s)
- M Khalfaoui
- Laboratoire de Physique Quantique, Département de Physique, Faculté des Sciences de Monastir 5019, Tunisia
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