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Harabi S, Guiza S, Álvarez-Montero A, Gómez-Avilés A, Belver C, Rodríguez JJ, Bedia J. Adsorption of 2,4-dichlorophenoxyacetic acid on activated carbons from macadamia nut shells. Environ Res 2024; 247:118281. [PMID: 38266891 DOI: 10.1016/j.envres.2024.118281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/18/2024] [Accepted: 01/19/2024] [Indexed: 01/26/2024]
Abstract
This study reports on the application of activated carbons from macadamia nut shells as adsorbents for the removal of 2,4-dichlorophenoxyacetic acid, a commonly used pesticide, from water. Different activating agents (FeCl3, ZnCl2, KOH and H3PO4) were used to obtain adsorbents within a wide range of porous texture and surface properties. The characterization of the resulting activated carbons was performed by N2 adsorption-desorption, elemental analysis, TG and pHPZC. The adsorption experiments were conducted in batch at 25, 45 and 65 °C. The adsorption kinetics on activated carbons obtained with FeCl3 H3PO4 or KOH was well described by the pseudo-second order model, whereas for the resulting from ZnCl2 activation the experimental data fit better the pseudo-first order model. The equilibrium studies were performed with the KOH- and ZnCl2-activated carbons, the two showing higher surface area values. In both cases, high adsorption capacities were obtained (c.a. 600 mg g-1) and the experimental data were better described by the Langmuir and Toth models. The thermodynamic study allows concluding the spontaneous and endothermic character of the adsorption process, as well as an increase of randomness at the solid/liquid interface. Breakthrough curves were also obtained and fitted to the logistic model.
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Affiliation(s)
- S Harabi
- University of Gabes, National Engineering School of Gabes, Laboratory of Applied Thermodynamic, LR18ES33, 6029, Gabes, Tunisia
| | - S Guiza
- University of Gabes, National Engineering School of Gabes, Laboratory of Applied Thermodynamic, LR18ES33, 6029, Gabes, Tunisia
| | - A Álvarez-Montero
- Chemical Engineering Department, Universidad Autónoma de Madrid, Campus Cantoblanco, E-28049, Madrid, Spain
| | - A Gómez-Avilés
- Chemical Engineering Department, Universidad Autónoma de Madrid, Campus Cantoblanco, E-28049, Madrid, Spain
| | - C Belver
- Chemical Engineering Department, Universidad Autónoma de Madrid, Campus Cantoblanco, E-28049, Madrid, Spain
| | - J J Rodríguez
- Chemical Engineering Department, Universidad Autónoma de Madrid, Campus Cantoblanco, E-28049, Madrid, Spain.
| | - J Bedia
- Chemical Engineering Department, Universidad Autónoma de Madrid, Campus Cantoblanco, E-28049, Madrid, Spain.
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Gómez-Avilés A, Peñas-Garzón M, Belver C, Rodriguez J, Bedia J. Equilibrium, kinetics and breakthrough curves of acetaminophen adsorption onto activated carbons from microwave-assisted FeCl3-activation of lignin. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119654] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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