Simultaneous degradation of pharmaceuticals in fixed and fluidized bed reactors using iron-modified diatomite as heterogeneous Fenton catalyst

Vista sencilla de ítem
dc.creatorUlloa Ovares, Daniel
dc.creatorRodríguez Rodríguez, Carlos E.
dc.creatorMasís Mora, Mario Alberto
dc.creatorDurán Herrera, Esteban
dc.date.accessioned2021-10-01T17:13:06Z
dc.date.available2021-10-01T17:13:06Z
dc.date.issued2021
dc.description.abstractThe aim of this study was to evaluate the use of pelletized iron-modified diatomite as heterogeneous Fenton catalyst for the removal of carbamazepine, clindamycin, gemfibrozil, ketoprofen, florfenicol, and sulfamethazine, and to compare its performance in fixed and fluidized bed reactor configurations. The prepared catalyst pellets were characterized by XRD, SEM, ED-XRF, BET, and compression strength analysis. Applying a Taguchi L9 design of experiments, the oxidation of a mixture of six common pharmaceuticals was studied under different operating conditions (initial pH, particle size, space time, and H2O2 initial concentration) for both reactor configurations. Under the best operating conditions, overall pharmaceutical degradations by the Fenton reaction were 32.6 % and 31.8 % in the fluidized and fixed bed reactors, respectively. Among the analyzed pharmaceuticals, clindamycin was the one presenting the highest removal (88.8 % fixed, 89.7 % fluidized), followed by gemfibrozil (70.4 % fixed, 100 % fluidized), ketoprofen (36.2 % fixed, 35.1 % fluidized), carbamazepine (19.0 % fixed, 21.1 % fluidized), sulfamethazine (18.1 % fixed, 21.1 % fluidized), and florfenicol (4.6 % fixed, 7.0 % fluidized). The initial pH was the most sensitive variable, presenting the best performance at pH 3. After 10 h of operation, the catalyst suffered a 27.9 % decrease in its activity when operated in the fixed bed reactor, whereas in the fluidized bed reactor its deactivation was 52.1 %. The catalyst was also evaluated in a real wastewater matrix, showing basically the same activity as in synthetic wastewater; TOC overall removal was 31 % for the fixed bed and 36 % for the fluidized bed reactor. Finally, the electrical energy per order (EEO) consumed in both reactors was calculated to compare their energy efficiency; the fixed bed configuration presented the lowest value (1.01 Wh/m3/order), suggesting that this is a more energy-efficient configuration for commercial wastewater treatment applications.es_ES
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro en Investigación en Contaminación Ambiental (CICA)es_ES
dc.description.procedenceUCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de Químicaes_ES
dc.description.sponsorshipUniversidad de Costa Rica/[802-B7-A09]/UCR/Costa Ricaes_ES
dc.description.sponsorshipUniversidad de Costa Rica/[802-B8-510]/UCR/Costa Ricaes_ES
dc.description.sponsorshipMinisterio de Ciencia, Tecnología y Telecomunicaciones/[FI-197B-17]/MICITT/Costa Ricaes_ES
dc.identifier.citationhttps://www.sciencedirect.com/science/article/pii/S0957582021002731
dc.identifier.codproyecto802-B7-A09
dc.identifier.codproyecto802-B8-510
dc.identifier.doi10.1016/j.psep.2021.05.032
dc.identifier.issn0957-5820
dc.identifier.urihttps://hdl.handle.net/10669/84485
dc.language.isoenges_ES
dc.rightsacceso embargado
dc.sourceProcess Safety and Environmental Protection, vol.152, pp.97-107es_ES
dc.subjectFenton reactiones_ES
dc.subjectCatalytic systemses_ES
dc.subjectEmerging contaminantses_ES
dc.subjectRemoval strategieses_ES
dc.subjectHeterogeneous reactores_ES
dc.subjectWastewateres_ES
dc.subjectINGENIERÍA QUÍMICA - ASPECTOS AMBIENTALESes_ES
dc.titleSimultaneous degradation of pharmaceuticals in fixed and fluidized bed reactors using iron-modified diatomite as heterogeneous Fenton catalystes_ES
dc.typeartículo original

Archivos

Bloque original
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
Carlos Rodríguez Simultaneous degradation of pharmaceuticals in fixed and.pdf
Tamaño:
7.79 MB
Formato:
Adobe Portable Document Format
Descripción:
Descargar
Bloque de licencias
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
license.txt
Tamaño:
3.5 KB
Formato:
Item-specific license agreed upon to submission
Descripción:
Descargar

Colecciones

Gestión Ambiental