1
|
Lopez E, Gómez M, Becar I, Zapata P, Pizarro J, Navlani-García M, Cazorla-Amorós D, Presser V, Gómez T, Cárdenas C. Removal of Mo(VI), Pb(II), and Cu(II) from wastewater using electrospun cellulose acetate/chitosan biopolymer fibers. Int J Biol Macromol 2024; 269:132160. [PMID: 38718995 DOI: 10.1016/j.ijbiomac.2024.132160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 04/18/2024] [Accepted: 05/05/2024] [Indexed: 05/30/2024]
Abstract
Environmentally friendly polymers such as cellulose acetate (CA) and chitosan (CS) were used to obtain electrospun fibers for Cu2+, Pb2+, and Mo6+ capture. The solvents dichloromethane (DCM) and dimethylformamide (DMF) allowed the development of a surface area of 148 m2 g-1 for CA fibers and 113 m2 g-1 for cellulose acetate/chitosan (CA/CS) fibers. The fibers were characterized by IR-DRIFT, SEM, TEM, CO2 sorption isotherms at 273 K, Hg porosimetry, TGA, stress-strain tests, and XPS. The CA/CS fibers had a higher adsorption capacity than CA fibers without affecting their physicochemical properties. The capture capacity reached 102 mg g-1 for Cu2+, 49.3 mg g-1 for Pb2+, and 13.1 mg g-1 for Mo6+. Furthermore, optimal pH, adsorption times qt, and C0 were studied for the evaluation of kinetic models and adsorption isotherms. Finally, a proposal for adsorbate-adsorbent interactions is presented as a possible capture mechanism where, in the case of Mo6+, a computational study is presented. The results demonstrate the potential to evaluate the fibers in tailings wastewater from copper mining.
Collapse
Affiliation(s)
- Esmeralda Lopez
- Departamento de Ingeniería Metalúrgica, Facultad de Ingeniería, Universidad de Santiago de Chile, USACH, Santiago 9170022, Chile; Laboratorio de Química Ambiental y Remediación, Departamento de Ingeniería Geoespacial y Ambiental, Facultad de Ingeniería, Universidad de Santiago de Chile, USACH, Santiago 9170022, Chile; Grupo Polímeros, Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago 9170022, Chile.
| | - Mauricio Gómez
- Laboratorio de Química Ambiental y Remediación, Departamento de Ingeniería Geoespacial y Ambiental, Facultad de Ingeniería, Universidad de Santiago de Chile, USACH, Santiago 9170022, Chile; Grupo Polímeros, Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago 9170022, Chile.
| | - Ian Becar
- Laboratorio de Química Ambiental y Remediación, Departamento de Ingeniería Geoespacial y Ambiental, Facultad de Ingeniería, Universidad de Santiago de Chile, USACH, Santiago 9170022, Chile
| | - Paula Zapata
- Grupo Polímeros, Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago 9170022, Chile
| | - Jaime Pizarro
- Laboratorio de Química Ambiental y Remediación, Departamento de Ingeniería Geoespacial y Ambiental, Facultad de Ingeniería, Universidad de Santiago de Chile, USACH, Santiago 9170022, Chile
| | - Miriam Navlani-García
- Instituto Universitario de Materiales, Departamento de Química Inorgánica, Universidad de Alicante, Apartado 99, 03080 Alicante, Spain
| | - Diego Cazorla-Amorós
- Instituto Universitario de Materiales, Departamento de Química Inorgánica, Universidad de Alicante, Apartado 99, 03080 Alicante, Spain
| | - Volker Presser
- INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany; Department of Material Science and Engineering, Saarland University, Campus D2 2, 66123 Saarbrücken, Germany; Saarene - Saarland Center for Energy Materials and Sustainability, Campus C4 2, 66123 Saarbrücken, Germany
| | - Tatiana Gómez
- Theoretical and Computational Chemistry Center, Institute of Applied Sciences, Faculty of Engineering, Universidad Autonoma de Chile, Santiago, Chile
| | - Carlos Cárdenas
- Departamento de Física, Facultad de Ciencias, Universidad de Chile, Av. Las Palmeras 3425, Ñuñoa, Santiago, Chile; Centro para el Desarrollo de la Nanociencia y la Nanotecnología (CEDENNA), Av. Ecuador 3493, Santiago 9170124, Chile
| |
Collapse
|
2
|
Matusoiu F, Negrea A, Ciopec M, Duteanu N, Negrea P, Ianasi P, Ianasi C. Vanadium (V) Adsorption from Aqueous Solutions Using Xerogel on the Basis of Silica and Iron Oxide Matrix. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8970. [PMID: 36556774 PMCID: PMC9786883 DOI: 10.3390/ma15248970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 11/02/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
Vanadium is considered a strategic metal with wide applications in various industries due to its unique chemical and physical properties. On the basis of these considerations, the recovery of vanadium (V) is mandatory because of the lack of raw materials. Various methods are used to recover vanadium (V) from used aqueous solutions. This study develops a clean and effective process for the recovery of vanadium (V) by using the adsorption method. At the same time, this study synthesizes a material starting from silica matrices and iron oxides, which is used as an adsorbent material. To show the phase composition, the obtained material is characterized by X-ray diffraction showing that the material is present in the amorphous phase, with a crystal size of 20 nm. However, the morphological texture of the material is determined by the N2 adsorption-desorption method, proving that the adsorbent material has a high surface area of 305 m2/g with a total pore volume of 1.55 cm3/g. To determine the efficiency of the SiO2FexOy material for the recovery of vanadium through the adsorption process, the role of specific parameters, such as the L-to-V ratio, pH, contact time, temperature, and initial vanadium concentration, must be evaluated. The adsorption process mechanism was established through kinetic, thermodynamic, and equilibrium studies. In our case, the process is physical, endothermic, spontaneous, and takes place at the interface of SiO2FexOy with V2O5. Following equilibrium studies, the maximum adsorption capacity of the SiO2FexOy material was 58.8 mg (V)/g of material.
Collapse
Affiliation(s)
- Florin Matusoiu
- Faculty of Industrial Chemistry and Environmental Engineering, Polytechnic University of Timişoara, Victoriei Square, no. 2, 300006 Timisoara, Romania
| | - Adina Negrea
- Faculty of Industrial Chemistry and Environmental Engineering, Polytechnic University of Timişoara, Victoriei Square, no. 2, 300006 Timisoara, Romania
| | - Mihaela Ciopec
- Faculty of Industrial Chemistry and Environmental Engineering, Polytechnic University of Timişoara, Victoriei Square, no. 2, 300006 Timisoara, Romania
| | - Narcis Duteanu
- Faculty of Industrial Chemistry and Environmental Engineering, Polytechnic University of Timişoara, Victoriei Square, no. 2, 300006 Timisoara, Romania
| | - Petru Negrea
- Faculty of Industrial Chemistry and Environmental Engineering, Polytechnic University of Timişoara, Victoriei Square, no. 2, 300006 Timisoara, Romania
| | - Paula Ianasi
- National Institute for Research and Development in Electrochemistry and Condensed Matter, 144th Dr. A.P. Podeanu Street, 300569 Timisoara, Romania
| | - Cătălin Ianasi
- “Coriolan Drăgulescu” Institute of Chemistry, Bv. Mihai Viteazul, No. 24, 300223 Timisoara, Romania
| |
Collapse
|