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Toward the design of efficient adsorbents for Hg2+ removal: Molecular and thermodynamic insights

dc.creatorForgionny A.
dc.creatorAcelas N.Y.
dc.creatorJimenez-Orozco C.
dc.creatorFlórez E.
dc.date2020
dc.date.accessioned2021-02-05T14:58:56Z
dc.date.available2021-02-05T14:58:56Z
dc.identifier.issn207608
dc.identifier.urihttp://hdl.handle.net/11407/6038
dc.descriptionA systematic DFT study was performed to evaluate the effect of oxygenated functional groups for Hg2+ adsorption in aqueous systems. This work includes several aspects usually neglected in many current works, namely, ground-state multiplicity, solvation effects, establishment of thermodynamic parameters, atomic charge transfer, and modeling of infrared spectra. In addition, two carbonaceous models were studied to account for both the effect of the carbonaceous matrix and the oxygenated functional groups on the Hg2+ binding. Adsorption energies indicated that Hg2+ adsorption on the unsaturated model is favored in the following order: phenol > lactone > semiquinone > carboxyl, whereas for the saturated model, the Hg2+ adsorption energy decrease order is: carboxyl > semiquinone > lactone. Thermodynamic parameters confirmed that the adsorption process is spontaneous (unsaturated model), while the infrared spectra provided an insight at the atomic level about the experimentally reported bands. Our results contributed to a deeper understanding of the current experimental information on the effect of the surface functional groups on the Hg2+ adsorption over carbonaceous materials as different active sites can be present on oxygenated carbonaceous materials for metal adsorption. The results also create new ways to improve the performance of adsorption capability of mercury and other pollutants. © 2020 Wiley Periodicals, Inc.
dc.language.isoeng
dc.publisherJohn Wiley and Sons Inc.
dc.relation.isversionofhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85084308339&doi=10.1002%2fqua.26258&partnerID=40&md5=82dbd6da8f9243b6cbaf3d4072eb5319
dc.sourceInternational Journal of Quantum Chemistry
dc.subjectadsorptionspa
dc.subjectaqueous solutionspa
dc.subjectcarbonaceous materialspa
dc.subjectmercuryspa
dc.subjectwater treatmentspa
dc.titleToward the design of efficient adsorbents for Hg2+ removal: Molecular and thermodynamic insights
dc.typeArticleeng
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccess
dc.identifier.doi10.1002/qua.26258
dc.subject.keywordAtomseng
dc.subject.keywordCharge transfereng
dc.subject.keywordDesign for testabilityeng
dc.subject.keywordEsterseng
dc.subject.keywordGround stateeng
dc.subject.keywordSpectroscopyeng
dc.subject.keywordThermodynamicseng
dc.subject.keywordAdsorption capabilityeng
dc.subject.keywordAdsorption energieseng
dc.subject.keywordAdsorption processeng
dc.subject.keywordCarbonaceous materialseng
dc.subject.keywordCarbonaceous matrixeng
dc.subject.keywordState multiplicityeng
dc.subject.keywordSurface functional groupseng
dc.subject.keywordThermodynamic parametereng
dc.subject.keywordAdsorptioneng
dc.publisher.facultyFacultad de Ciencias Básicasspa
dc.affiliationForgionny, A., Grupo de Materiales con Impacto, Mat&mpac. Facultad de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia
dc.affiliationAcelas, N.Y., Grupo de Materiales con Impacto, Mat&mpac. Facultad de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia
dc.affiliationJimenez-Orozco, C., Grupo de Materiales con Impacto, Mat&mpac. Facultad de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia
dc.affiliationFlórez, E., Grupo de Materiales con Impacto, Mat&mpac. Facultad de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia
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