Mostrar el registro sencillo del ítem

dc.contributor.authorVillen-Guzman, Maria
dc.contributor.authorPaz-Garcia, J.M.
dc.contributor.authorArhoun, B.
dc.contributor.authorCerrillo-González, María del Mar
dc.contributor.authorRodriguez-Maroto, Jose Miguel 
dc.contributor.authorVereda-Alonso, Carlos 
dc.contributor.authorGomez-Lahoz, Cesar 
dc.date.accessioned2021-01-13T07:46:49Z
dc.date.available2021-01-13T07:46:49Z
dc.date.created2020
dc.date.issued2020-02-12
dc.identifier.citationVillen-Guzman, M.; Paz-Garcia, J.M.; Arhoun, B.; Cerrillo-Gonzalez, M.d.M.; Rodriguez-Maroto, J.M.; Vereda-Alonso, C.; Gomez-Lahoz, C. Chemical Reduction of Nitrate by Zero-Valent Iron: Shrinking-Core versus Surface Kinetics Models. Int. J. Environ. Res. Public Health 2020, 17, 1241.es_ES
dc.identifier.urihttps://hdl.handle.net/10630/20678
dc.description.abstractZero valent iron (ZVI) is being used in permeable reactive barriers (PRB) for the removal of oxidant contaminants, from nitrate to chlorinated organics. A sound design of these barriers requires a good understanding of kinetics. Here we present a study of the kinetics of nitrate reduction under relatively low values of pH, from 2 to 4.5. We use a particle size of 0.42 mm, which is within the recommended size for PRBs (0.2 mm to 2.0 mm). In order to avoid possible mass-transfer limitations, a well-stirred reactor coupled with a fluidized bed reactor was used. The experiments were performed at constant pH values using a pH controller that allows to accurately track the amount of acid added. Since the reduction of H+ to H2 by the oxidation of ZVI will always be present for these pH values, blank experiments (without nitrate) were performed and the rate of this H+ reduction obtained. This rate of reduction was studied using three kinetic models: a regular empirical one, the Shrinking-Core Model (SCM), and the Surface Kinetics Model (SKM). The best performance was obtained from the SKM model. Therefore, this model was also used to study the results for the nitrate reduction, also with satisfactory results. In both cases, some assumptions are introduced to maintain a moderate number of fitting parameters.es_ES
dc.description.sponsorshipThis research was funded by the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No. 778045, by the “Proyectos I + D + i en el marco del Programa Operativo FEDER Andalucía 2014–2020, No UMA18-FEDERJA-279” and the project from the University of Malaga, No. PPIT.UMA.B5.2018/17. Villen-Guzman acknowledges the postdoctoral fellowship obtained from the University of Malaga. Cerrillo-Gonzalez acknowledges the FPU grant obtained from the Spanish Ministry of Education.es_ES
dc.language.isoenges_ES
dc.publisherMDPIes_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.subjectMembranas intercambiadoras de ioneses_ES
dc.subjectIntercambio iónicoes_ES
dc.subject.otherNitrate reductiones_ES
dc.subject.otherZero valent irones_ES
dc.subject.otherPermeable reactive barrieres_ES
dc.subject.otherShrinking-core modeles_ES
dc.titleChemical reduction of nitrate by zero-valent iron: Shrinking-Core versus Surface Kinetics Modelses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.centroFacultad de Cienciases_ES
dc.identifier.doihttps://doi.org/10.3390/ijerph17041241
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersiones_ES


Ficheros en el ítem

Este ítem aparece en la(s) siguiente(s) colección(ones)

Mostrar el registro sencillo del ítem