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Futalan CCM, Quiton KGN, Choi AES. Arsenate removal using chitosan-coated bentonite via fixed-bed system: a process integration by fuzzy optimization. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-33301-1. [PMID: 38622419 DOI: 10.1007/s11356-024-33301-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Accepted: 04/09/2024] [Indexed: 04/17/2024]
Abstract
Groundwater contamination is a global concern that has detrimental effect on public health and the environment. Sustainable groundwater treatment technologies such as adsorption require attaining a high removal efficiency at a minimal cost. This study investigated the adsorption of arsenate from groundwater utilizing chitosan-coated bentonite (CCB) under a fixed-bed column setup. Fuzzy multi-objective optimization was applied to identify the most favorable conditions for process variables, including volumetric flow rate, initial arsenate concentration, and CCB dosage. Empirical models were employed to examine how initial concentration, flow rate, and adsorbent dosage affect adsorption capacity at breakthrough, energy consumption, and total operational cost during optimization. The ε-constraint process was used in identifying the Pareto frontier, effectively illustrating the trade-off between adsorption capacity at breakthrough and the cost of the fixed-bed system. The integration of fuzzy optimization for adsorption capacity and its total operating cost utilized the global solver function in LINGO 20 software. A crucial equation derived from the Box-Behnken design and a cost equation based on energy and material usage in the fixed-bed system was employed. The results from identifying the Pareto front determined boundary limits for adsorption capacity at breakthrough (ranging from 12.96 ± 0.19 to 12.34 ± 0.42 μg/g) and total operating cost (ranging from 955.83 to 1106.32 USD/kg). An overall satisfaction level of 35.46% was achieved in the fuzzy optimization process. This results in a compromise solution of 12.90 μg/g for adsorption capacity at breakthrough and 1052.96 USD/kg for total operating cost. Henceforth, this can allow a suitable strategic decision-making approach for key stakeholders in future applications of the adsorption fixed-bed system.
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Affiliation(s)
| | - Khyle Glainmer Nagtalon Quiton
- School of Chemical, Biological, and Materials Engineering and Sciences, Mapúa University, 1002, Intramuros, Manila, Philippines
| | - Angelo Earvin Sy Choi
- Department of Chemical Engineering, De La Salle University, 2401 Taft Avenue, 0922, Malate, Manila, Philippines.
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Martínez ME, Rangel-Méndez JR, Gimeno M, Tecante A, Lapidus GT, Shirai K. Removal of Heavy Metal Ions from Wastewater with Poly-ε-Caprolactone-Reinforced Chitosan Composite. Polymers (Basel) 2022; 14:polym14235196. [PMID: 36501593 PMCID: PMC9740919 DOI: 10.3390/polym14235196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/11/2022] [Accepted: 11/15/2022] [Indexed: 12/02/2022] Open
Abstract
Currently, the requirements for adsorbent materials are based on their environmentally friendly production and biodegradability. However, they are also related to the design of materials to sustain many cycles in pursuit of low cost and profitable devices for water treatments. In this regard, a chitosan reinforced with poly-ε-caprolactone thermoplastic composite was prepared and characterized by scanning electron microscopy; Fourier transforms infrared spectroscopy, X-ray diffraction analysis, mechanical properties, as well as erosion and swelling assays. The isotherm and kinetic data were fitted with Freundlich and pseudo-second-order models, respectively. The adsorption equilibrium capacities at pH 6 of Zn(II), Cu(II), Fe(II), and Al(III) were 165.59 ± 3.41 mg/g, 3.91 ± 0.02 mg/g, 10.72 ± 0.11 mg/g, and 1.99 ± 0.22 mg/g, respectively. The adsorbent material lost approximately 6% of the initial mass in the adsorption-desorption processes.
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Affiliation(s)
- Manuel E. Martínez
- Laboratorio de Biopolímeros y Planta Piloto de Bioprocesos de Residuos Agroindustriales y de Alimentos, Unidad Iztapalapa, Departamento de Biotecnología, Universidad Autónoma Metropolitana, Av. Ferrocarril San Rafael Atlixco número 186, Colonia Leyes de Reforma 1a sección, Alcaldía de Iztapalapa, Mexico City 09310, Mexico
| | - José René Rangel-Méndez
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, A.C., Camino a la Presa San José No. 2055, San Luis Potosi 76210, Mexico
| | - Miquel Gimeno
- Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, Mexico City 04510, Mexico
| | - Alberto Tecante
- Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, Mexico City 04510, Mexico
| | - Gretchen T. Lapidus
- Unidad Iztapalapa, Departamento de Ingeniería de Procesos e Hidráulica, Universidad Autónoma Metropolitana, Avenida Ferrocarril San Rafael Atlixco número 186, Colonia Leyes de Reforma 1a Sección, Alcaldía de Iztapalapa, Mexico City 09310, Mexico
| | - Keiko Shirai
- Laboratorio de Biopolímeros y Planta Piloto de Bioprocesos de Residuos Agroindustriales y de Alimentos, Unidad Iztapalapa, Departamento de Biotecnología, Universidad Autónoma Metropolitana, Av. Ferrocarril San Rafael Atlixco número 186, Colonia Leyes de Reforma 1a sección, Alcaldía de Iztapalapa, Mexico City 09310, Mexico
- Correspondence:
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Enhanced Defluoridation of Water Using Zirconium-Coated Pumice in Fixed-Bed Adsorption Columns. MATERIALS 2021; 14:ma14206145. [PMID: 34683738 PMCID: PMC8540653 DOI: 10.3390/ma14206145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 12/07/2022]
Abstract
Millions of people across the globe suffer from health issues related to high fluoride levels in drinking water. The purpose of this study was to test modified pumice as an adsorbent for the purification of fluoride-containing waters. The adsorption of fluoride onto zirconium-coated pumice (Zr–Pu) adsorbent was examined in fixed-bed adsorption columns. The coating of zirconium on the surface of VPum was revealed by X-ray diffractometer (XRD), Inductively coupled plasma-optical emission spectroscopy (ICP-EOS), and X-ray fluorescence (XRF) techniques. The degree of surface modification with the enhanced porosity of Zr–Pu was evident from the recorded scanning electron microscope (SEM) micrographs. The Brunauer-Emmett-Teller (BET) analysis confirmed the enhancement of the specific surface area of VPum after modification. The Fourier transform infrared (FTIR) examinations of VPum and Zr–Pu before and after adsorption did not reveal any significant spectrum changes. The pH drift method showed that VPum and Zr–Pu have positive charges at pHPZC lower than 7.3 and 6.5, respectively. Zr–Pu yielded a higher adsorption capacity of 225 mg/kg (2.05 times the adsorption capacity of VPum: 110 mg/kg), at pH = 2 and volumetric flow rate (QO) of 1.25 mL/min. Breakthrough time increases with decreasing pH and flow rate. The experimental adsorption data was well-matched by the Thomas and Adams-Bohart models with correlation coefficients (R2) of ≥ 0.980 (Zr–Pu) and ≥ 0.897 (VPum), confirming that both models are suitable tools to design fixed-bed column systems using volcanic rock materials. Overall, coating pumice with zirconium improved the defluoridation capacity of pumice; hence, a Zr–Pu-packed fixed-bed can be applied for defluoridation of excess fluoride from groundwater. However, additional investigations on, for instance, the influences of competing ions are advisable to draw explicit conclusions.
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Camara AS, Lütke SF, Pinheiro CP, Vieira MLG, Sant'Anna Cadaval TR, de Almeida Pinto LA. Chitosan-coated sand and its application in a fixed-bed column to remove dyes in simple, binary, and real systems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:37938-37945. [PMID: 32617809 DOI: 10.1007/s11356-020-09924-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 06/29/2020] [Indexed: 06/11/2023]
Abstract
Adsorption of tartrazine yellow food dye, in a fixed-bed column, was carried out using a single system, a binary system (in the presence of sunset yellow food dye), and in a real effluent provides from an ice cream industry. Chitosan was used to coat sand particles by the dip-coating technique, and these particles were applied in fixed-bed adsorption. The assays were performed in flow rates of 3 mL min-1 and 5 mL min-1. The best performance was reached at 3 mL min-1. In this flow rate, for single and binary systems, the breakthrough time was 95 min and 65 min, and the maximum capacity of the column was around 595 mg g-1 and 497 mg g-1, respectively. In the assay conducted with the real effluent, the breakthrough time was 10 min, and the maximum adsorption capacity of the column was reduced to 191 mg g-1 for tartrazine dye. The dynamic models of Thomas and Yoon-Nelson were used, and both were suitable to represent the breakthrough curves.
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Affiliation(s)
- Alisson Schons Camara
- School of Chemistry and Food, Federal University of Rio Grande-FURG, km 8 Italia Avenue, Rio Grande, RS, 96203-900, Brazil
| | - Sabrina Frantz Lütke
- School of Chemistry and Food, Federal University of Rio Grande-FURG, km 8 Italia Avenue, Rio Grande, RS, 96203-900, Brazil
| | - Cláudio Pereira Pinheiro
- School of Chemistry and Food, Federal University of Rio Grande-FURG, km 8 Italia Avenue, Rio Grande, RS, 96203-900, Brazil
| | - Mery Luiza Garcia Vieira
- School of Chemistry and Food, Federal University of Rio Grande-FURG, km 8 Italia Avenue, Rio Grande, RS, 96203-900, Brazil
| | - Tito Roberto Sant'Anna Cadaval
- School of Chemistry and Food, Federal University of Rio Grande-FURG, km 8 Italia Avenue, Rio Grande, RS, 96203-900, Brazil.
| | - Luiz Antonio de Almeida Pinto
- School of Chemistry and Food, Federal University of Rio Grande-FURG, km 8 Italia Avenue, Rio Grande, RS, 96203-900, Brazil
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