Document
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Journal of Water Process Engineering
type: Collection
type: Document
publication venue for: Elucidating the low-frequency ultrasound effect on mass transfer resistances during phenol adsorption over microporous materials
type: Generically Dependent Continuant
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type: Journal
type: Information Content Entity
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Continuant
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Elucidating the low-frequency ultrasound effect on mass transfer resistances during phenol adsorption over microporous materials
date time value: article date 10034
related by: authorship_69321
type: Article
type: Generically Dependent Continuant
related by: authorship_69326
freetext keyword: Activated carbon pellets; Adsorption rate; Intraparticle diffusion; Ultrasound assistance
has publication venue: Journal of Water Process Engineering
crisid: 10034
most specific type: Document
type: Document
volume: 47
type: Entity
artnum: 102790
most specific type: Article
type: Continuant
type: Information Content Entity
abstract: To improve the adsorption rate of pollutants on microporous materials, a comparative study of the adsorption of phenol on activated carbon pellets (ACP) in the presence of conventional agitation and low-frequency ultrasound (US) was accomplished. Additionally, the effect of chemical and textural properties over the equilibrium and adsorption rate was evaluated by modifying the ACP with a physical reactivation process at different times. The textural properties of the adsorbents were obtained by physisorption of N2 at −196 °C and CO2 at 0 °C, while the functional groups were identified using XPS spectroscopy. The phenol adsorption equilibrium was studied at 25 and 45 °C, while the adsorption rate was conducted by varying the initial phenol concentration, stirring speed, and ultrasound amplitude. The results showed that the reactivation process improves the average micropore width and mesopore volume, which allows better diffusion of phenol towards the microporosity of the material, increasing the adsorption capacity from 164 to 217 mg/g at pH ≈ 7 and 25 °C. The concentration decay curves of phenol were predicted using a 3D-diffusional model. The results evidenced that in absence or presence of US, the overall adsorption rate is controlled by intraparticle diffusion. Moreover, the surface diffusion mechanism proved to be more important than the pore volume diffusion for both scenarios. Finally, it was demonstrated that US decreases the equilibrium times by enhancing the intraparticle diffusion causing a 2.36-fold increase in the value of the surface diffusion coefficients. Finally, the external mass transport was enhanced exclusively for ultramicroporous materials. © 2022 Elsevier Ltd
related by: authorship_69325
type: Thing
estado: published
related by: authorship_69327
doi: 10.1016/j.jwpe.2022.102790
origen: scopus
related by: authorship_69322
e iscopus: 2-s2.0-85128951481
has funding vehicle: Consejo Nacional de Ciencia y Tecnología, CONACYT: 1008270
related by: authorship_69324

RDF description of Elucidating the low-frequency ultrasound effect on mass transfer resistances during phenol adsorption over microporous materials - http://orbis.uaslp.mx/vivo/individual/scopus10033
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date: 2026-08-26T23:55:38
publisher: vivo
type: Document

Article
type: Class

Information Content Entity
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Consejo Nacional de Ciencia y Tecnología, CONACYT: 1008270
type: Relationship
type: BFO_0000020
type: Entity
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type: Continuant
funding vehicle for: Elucidating the low-frequency ultrasound effect on mass transfer resistances during phenol adsorption over microporous materials