Exploring the adsorption of five emerging pollutants on activated carbon: a theoretical approach

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dc.contributor.authorGonzález-Rodríguez, Lisdelys
dc.contributor.authorYáñez, Osvaldo
dc.contributor.authorMena-Ulecia, Karel
dc.contributor.authorHidalgo-Rosa, Yoan
dc.contributor.authorGarcía-Carmona, Ximena
dc.contributor.authorUlloa-Tesser, Claudia
dc.date.accessioned2024-07-26T14:45:10Z
dc.date.available2024-07-26T14:45:10Z
dc.date.issued2024-06-06
dc.description.abstractThe identification and management of contaminants of emerging concern (CECs) in water systems is crucial for protecting public and environmental health. This paper reports a theoretical approach to studying the adsorption of five CECs: Atrazine (ATZ), Caffeine (CAF), Carbamazepine (CBZ), Sulfamethoxazole (SMX), and Ibuprofen (IBU) - onto Activated Carbon (AC). A set of computational methods, including electrostatic molecular potential maps, conceptual density functional theory, Fukui functions, thermodynamic analysis, and tight-binding molecular dynamics simulations, were employed to analyze the electronic/energetic interactions and mechanisms involved in the adsorption of CECs on AC. The theoretical methodology offered valuable predictions on reactivity sites, stability, and binding mechanisms. Results showed that adsorption primarily occurred through non-covalent interactions like π-π electron donor-acceptor interactions, van der Waals forces, and hydrophobic interactions. Thermodynamic properties suggested the adsorption process was spontaneous and exothermic. However, for the AC/SMX system, the Gibbs free energy reveals that adsorption may be unfavorably compared to the other study systems. Molecular dynamics simulations validated the kinetic stability in the following order CAF (0.13 Å)>CBZ (0.23 Å)>ATZ (0.75 Å)> IBU (1.28 Å)>SMX (1.54 Å). This exploratory theoretical study provides a deep understanding of the interactions between AC and five CECs, aiding in the rational design and optimization of AC-based treatment systems for environmental and industrial applications.
dc.identifier.citationJournal of Environmental Chemical Engineering, Vol. 12, N°112911, (2024), p.1-10.
dc.identifier.doihttps://doi.org/10.1016/j.jece.2024.112911
dc.identifier.issn2213-2929
dc.identifier.issne2213-3437
dc.identifier.orcidhttps://orcid.org/0000-0002-1391-435X
dc.identifier.urihttp://hdl.handle.net/20.500.12254/3781
dc.language.isoen
dc.publisherElsevier
dc.rightsAtribución-NoComercial-CompartirIgual 3.0 Chile (CC BY-NC-SA 3.0 CL)
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/cl/
dc.subjectDFT studies
dc.subjectActivated carbon
dc.subjectContaminants of emerging concern
dc.titleExploring the adsorption of five emerging pollutants on activated carbon: a theoretical approach
dc.typeArticle
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