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Bio-Inspired phosphate adsorption by Copper-Decorated weak base anion exchanger. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Juela D, Vera M, Cruzat C, Alvarez X, Vanegas E. Mathematical modeling and numerical simulation of sulfamethoxazole adsorption onto sugarcane bagasse in a fixed-bed column. CHEMOSPHERE 2021; 280:130687. [PMID: 33964744 DOI: 10.1016/j.chemosphere.2021.130687] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 04/19/2021] [Accepted: 04/20/2021] [Indexed: 06/12/2023]
Abstract
Having rigorous mathematical models is essential for the design and scaling of adsorption columns. In this study, the dynamic behavior of the sulfamethoxazole adsorption on sugarcane bagasse was studied and compared using analytical models and a theoretical mechanistic model. Initially, fixed-bed column tests were carried out at different flow rates and bed heights. Then, the experimental data were fitted with the most widely used analytical kinetic models, and their fit and fixed-bed parameters were compared with the mechanistic model. Of all analytical models analyzed, the Log-Gompertz model was the one that had the best agreed with experimental data. Although some analytical models fitted the experimental data accurately, their usefulness was questionable. Their parameters did not show a clear relationship with the change in operating conditions, and in certain cases had different behavior from that observed in experimentation. Conversely, the mechanistic model not only predicted the breakthrough curves with great accuracy in the initial and transition stage (R2 > 0.92; SSE < 0.06), but it also estimated relevant parameters. Additionally, the effects of the global mass transfer coefficient (Ki) and the axial dispersion coefficient (Dz) on breakthrough curves were studied using the mechanistic model. Increasing Ki increased the slope of the breakthrough curves with a faster adsorption rate. Similarly, high values of Dz produced lower adsorption capacities of the adsorbent; and it was established that the axial dispersion is relevant in SMX adsorption on SB. The theoretical model presented can be used for the design, scaling, and optimization of adsorption columns.
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Affiliation(s)
- Diego Juela
- Chemical Engineering, Faculty of Chemical Sciences, University of Cuenca, 010203, Cuenca, Ecuador
| | - Mayra Vera
- Center for Environmental Studies, Department of Applied Chemistry and Production Systems, Faculty of Chemical Sciences, University of Cuenca, 010203, Cuenca, Ecuador
| | - Christian Cruzat
- Center for Environmental Studies, Department of Applied Chemistry and Production Systems, Faculty of Chemical Sciences, University of Cuenca, 010203, Cuenca, Ecuador
| | - Ximena Alvarez
- Center for Environmental Studies, Department of Applied Chemistry and Production Systems, Faculty of Chemical Sciences, University of Cuenca, 010203, Cuenca, Ecuador
| | - Eulalia Vanegas
- Center for Environmental Studies, Department of Applied Chemistry and Production Systems, Faculty of Chemical Sciences, University of Cuenca, 010203, Cuenca, Ecuador.
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Dávila-Guzmán N, Medina-Almaguer YB, Reyes-González MA, Loredo-Cancino M, Pioquinto-García S, De Haro-Del Rio DA, Garza-Navarro MA, Hernández-Fernández E. Microwave-Assisted Synthesis of trans-Cinnamic Acid for Highly Efficient Removal of Copper from Aqueous Solution. ACS OMEGA 2020; 5:317-326. [PMID: 31956778 PMCID: PMC6964288 DOI: 10.1021/acsomega.9b02720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 12/04/2019] [Indexed: 06/10/2023]
Abstract
trans-Cinnamic acid was synthesized under microwave irradiation, and it was used for the removal of copper, a toxic metal found in industrial wastewater, from synthetic polluted aqueous solutions. Copper removal is more favorable at pH 5 and was enhanced by increasing the copper initial concentration, reaching a maximum uptake capacity of 389.5 mg/g, which is higher than those reported in the literature. Temperature exhibited a negligible effect on the removal of copper by trans-cinnamic acid. The isotherm equilibrium uptake data were found to be described by the Langmuir model. In addition, the study of the removal kinetics shows that the uptake of copper by trans-cinnamic acid follows pseudo-first order kinetics, and equilibrium is attained at approximately 30 min. Based on the X-ray photoelectron spectroscopy, X-ray diffraction, scanning transmission electron microscopy, and Fourier-transform infrared spectroscopy studies, a copper-cinnamic acid complex [Cu(CA)2] is formed during the removal process. The reusability of this coordination compound was investigated using HCl, HNO3, and NaOH 0.1 M as desorption eluents; HCl was capable of completely desorbing copper from [Cu(CA)2], and trans-cinnamic acid was recovered as the trans-isomer. Alternatively, the [Cu(CA)2] was used to remove octamethylcyclotetrasiloxane from gaseous streams for biogas purification, obtaining an adsorption capacity of 3.37 mg/g. These promising results demonstrate the feasibility of copper removal by trans-cinnamic acid because of its high uptake capacity and potential reusability.
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Affiliation(s)
- Nancy
E. Dávila-Guzmán
- Universidad Autónoma
de Nuevo León, Facultad de Ciencias Químicas and Facultad de Ingeniería
Mecánica y Eléctrica, San Nicolás de los Garza, 66455 Nuevo León, Mexico
| | - Yhoana B. Medina-Almaguer
- Universidad Autónoma
de Nuevo León, Facultad de Ciencias Químicas and Facultad de Ingeniería
Mecánica y Eléctrica, San Nicolás de los Garza, 66455 Nuevo León, Mexico
| | - Miguel A. Reyes-González
- Universidad Autónoma
de Nuevo León, Facultad de Ciencias Químicas and Facultad de Ingeniería
Mecánica y Eléctrica, San Nicolás de los Garza, 66455 Nuevo León, Mexico
| | - Margarita Loredo-Cancino
- Universidad Autónoma
de Nuevo León, Facultad de Ciencias Químicas and Facultad de Ingeniería
Mecánica y Eléctrica, San Nicolás de los Garza, 66455 Nuevo León, Mexico
| | - Sandra Pioquinto-García
- Universidad Autónoma
de Nuevo León, Facultad de Ciencias Químicas and Facultad de Ingeniería
Mecánica y Eléctrica, San Nicolás de los Garza, 66455 Nuevo León, Mexico
| | - David A. De Haro-Del Rio
- Universidad Autónoma
de Nuevo León, Facultad de Ciencias Químicas and Facultad de Ingeniería
Mecánica y Eléctrica, San Nicolás de los Garza, 66455 Nuevo León, Mexico
| | - Marco A. Garza-Navarro
- Universidad Autónoma
de Nuevo León, Facultad de Ciencias Químicas and Facultad de Ingeniería
Mecánica y Eléctrica, San Nicolás de los Garza, 66455 Nuevo León, Mexico
- Universidad
Autónoma de Nuevo León, Centro
de Innovación y Desarrollo en Ingeniería y Tecnología, Apodaca, 66600 Nuevo León, Mexico
| | - Eugenio Hernández-Fernández
- Universidad Autónoma
de Nuevo León, Facultad de Ciencias Químicas and Facultad de Ingeniería
Mecánica y Eléctrica, San Nicolás de los Garza, 66455 Nuevo León, Mexico
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Carvalho RNSD, Guimarães D, Leão VA, Dutra JCS, Silva WBD. ESTIMATION OF PARAMETERS AND STATES USING A BAYESIAN PARTICLE FILTER FOR THE SULFATE ION ADSORPTION PROCESS IN A FIXED BED COLUMN. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2019. [DOI: 10.1590/0104-6632.20190363s20180059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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