Document
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State Key Laboratory for Environmental Criteria and Risk Assessment, SKLECRA: SKLECRA2013FP12
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type: BFO_0000020
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type: Thing
type: Grant
type: Continuant
funding vehicle for: Cr(VI) adsorption on activated carbon: Mechanisms, modeling and limitations in water treatment

Continuant
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Entity
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Generically Dependent Continuant
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RDF description of Cr(VI) adsorption on activated carbon: Mechanisms, modeling and limitations in water treatment - http://orbis.uaslp.mx/vivo/individual/scopus6379
rights: termsOfUse
date: 2026-08-25T07:02:28
publisher: vivo
type: Document

Article
type: Class

Universidad Nacional de San Luis, UNSL
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type: BFO_0000020
type: Entity
type: Thing
type: Grant
type: Continuant
funding vehicle for: Cr(VI) adsorption on activated carbon: Mechanisms, modeling and limitations in water treatment

Information Content Entity
type: Class

Cr(VI) adsorption on activated carbon: Mechanisms, modeling and limitations in water treatment
type: Generically Dependent Continuant
most specific type: Document
has funding vehicle: China Scholarship Council, CSC
origen: scopus
doi: 10.1016/j.jece.2020.104031
has publication venue: Journal of Environmental Chemical Engineering
related by: authorship_41483
type: Thing
type: Article
volume: 8
date time value: article date 6380
artnum: 104031
type: Continuant
related by: authorship_41485
related by: authorship_41482
e iscopus: 2-s2.0-85086992165
type: Entity
related by: authorship_41484
most specific type: Article
freetext keyword: Activated carbon; Adsorption mechanisms; Adsorption modeling; Chromium removal; Water treatment Activated carbon; Activated carbon treatment; Activation energy; Adsorption; Adsorption isotherms; Redox reactions; Surface diffusion; Adsorption energies; Adsorption mechanism; Adsorption process; Batch adsorption tests; Continuous layers; Granular activated carbons; Langmuir models; Surface diffusion model; Chromium compounds
estado: published
has funding vehicle: State Key Laboratory for Environmental Criteria and Risk Assessment, SKLECRA: SKLECRA2013FP12
has funding vehicle: Universidad Nacional de San Luis, UNSL
related by: authorship_41486
type: Document
crisid: 6380
issue: 4
type: Information Content Entity
abstract: Adsorption of Cr(VI) on highly porous granular activated carbon (GAC) was studied through batch adsorption tests at a very long time, various temperatures and pH 3.5, in order to delineate the adsorption mechanisms, model the adsorption process and assess the applicability of GAC in water treatment. Adsorption of Cr(VI) occurred through a redox reaction with the formation of Cr2O3(s) (Cruz-Espinoza et al., 2012). It is reported for the first time that Cr(VI) adsorption proceeded in two steps. Furthermore, adsorption increased with temperature and reached equilibrium after several hours. In the first step, very fast adsorption occurred with the formation of a nano-size continuous layer of Cr2O3(s) coating on the GAC surface, as revealed by SEM analysis. In the second stage, adsorption occurred at a very slow rate due to the slow diffusion rate through the continuous Cr2O3(s) layer on the GAC surface. The two adsorption steps were successfully described by the surface diffusion model and pore volume diffusion model. The first step is controlled by surface diffusion while the second step by both pore volume diffusion and surface diffusion. A pseudo-activation energy was determined for each adsorption step and found that more adsorption energy is required in the first step than the second step. The adsorption isotherms for various temperatures were fitted well by the Langmuir model. The Cr2O3 layer on the GAC is responsible for its low Cr(VI) adsorption capacity, so a large amount of GAC would be required to treat water with Cr(VI). © 2020 Elsevier Ltd.

Journal of Environmental Chemical Engineering
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type: Information Content Entity
publication venue for: Cr(VI) adsorption on activated carbon: Mechanisms, modeling and limitations in water treatment
type: Collection
type: Entity
type: Document
type: Periodical
type: Continuant

China Scholarship Council, CSC
type: Relationship
type: BFO_0000020
type: Entity
type: Thing
type: Grant
type: Continuant
funding vehicle for: Cr(VI) adsorption on activated carbon: Mechanisms, modeling and limitations in water treatment