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Methylene blue number as useful indicator to evaluate the adsorptive capacity of granular activated carbon in batch mode: Influence of adsorbate/adsorbent mass ratio and particle size

Methylene blue number as useful indicator to evaluate the adsorptive capacity of granular activated carbon in batch mode: Influence of adsorbate/adsorbent mass ratio and particle size
Methylene blue number as useful indicator to evaluate the adsorptive capacity of granular activated carbon in batch mode: Influence of adsorbate/adsorbent mass ratio and particle size
The adsorption of methylene blue (MB) on three commercial granular activated carbons (GACs), 12 × 40 mesh size, namely Filtrasorb 400, Norit and Picacarb has been researched. A comparative study of adsorptive capacity using the proposed single-point test and the traditional multi-point isotherm test was carried out. For the single-point test, the influence of some parameters such as MB/GACs mass ratio and contact time were evaluated. For this test the adsorptive capacities of the three GACs studied were 319 ± 14, 280 ± 7 and 260 ± 6 mg g?1 for Filtrasorb 400, Norit and Picacarb, respectively. For multi-point isotherm adsorption test the Langmuir model was used. The parameters involved were obtained by linear and non-linear regression methods. The maximum adsorptive capacity values obtained for both methods were similar and statistically not different than those obtained with the single-point tests. This experimental work also aimed at establishing a relationship between the adsorbent particle size and the adsorptive capacity which could be used complementarily to evaluate the quality of GACs as adsorbents. For a mean particle diameter of 1 mm and after 24 h of contact time the adsorptive capacity values were 255 ± 7, 222 ± 7 and 160 ± 7 mg g?1 for Filtrasorb 400, Norit and Picacarb, respectively.
methylene blue (MB), basic dye, granular activated carbon (GAC), adsorbate/adsorbent mass ratio, adsorption isotherm, langmuir model
0304-3894
291-299
Raposo, F.
47104451-511a-4b03-aaa9-67348da4567d
De la Rubia Romero, M.A.
c93edd9f-0c39-49a3-883f-1582cf1c700c
Borja, R.
ed513484-04ff-4424-ab79-dc715ca63146
Raposo, F.
47104451-511a-4b03-aaa9-67348da4567d
De la Rubia Romero, M.A.
c93edd9f-0c39-49a3-883f-1582cf1c700c
Borja, R.
ed513484-04ff-4424-ab79-dc715ca63146

Raposo, F., De la Rubia Romero, M.A. and Borja, R. (2008) Methylene blue number as useful indicator to evaluate the adsorptive capacity of granular activated carbon in batch mode: Influence of adsorbate/adsorbent mass ratio and particle size. Journal of Hazardous Materials, 165 (1-3), 291-299. (doi:10.1016/j.jhazmat.2008.09.106).

Record type: Article

Abstract

The adsorption of methylene blue (MB) on three commercial granular activated carbons (GACs), 12 × 40 mesh size, namely Filtrasorb 400, Norit and Picacarb has been researched. A comparative study of adsorptive capacity using the proposed single-point test and the traditional multi-point isotherm test was carried out. For the single-point test, the influence of some parameters such as MB/GACs mass ratio and contact time were evaluated. For this test the adsorptive capacities of the three GACs studied were 319 ± 14, 280 ± 7 and 260 ± 6 mg g?1 for Filtrasorb 400, Norit and Picacarb, respectively. For multi-point isotherm adsorption test the Langmuir model was used. The parameters involved were obtained by linear and non-linear regression methods. The maximum adsorptive capacity values obtained for both methods were similar and statistically not different than those obtained with the single-point tests. This experimental work also aimed at establishing a relationship between the adsorbent particle size and the adsorptive capacity which could be used complementarily to evaluate the quality of GACs as adsorbents. For a mean particle diameter of 1 mm and after 24 h of contact time the adsorptive capacity values were 255 ± 7, 222 ± 7 and 160 ± 7 mg g?1 for Filtrasorb 400, Norit and Picacarb, respectively.

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More information

Published date: 2008
Keywords: methylene blue (MB), basic dye, granular activated carbon (GAC), adsorbate/adsorbent mass ratio, adsorption isotherm, langmuir model

Identifiers

Local EPrints ID: 76063
URI: http://eprints.soton.ac.uk/id/eprint/76063
ISSN: 0304-3894
PURE UUID: 6083e435-cb68-4ec0-ac8f-6f36f9042485

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Date deposited: 12 Mar 2010
Last modified: 13 Mar 2024 23:05

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Contributors

Author: F. Raposo
Author: M.A. De la Rubia Romero
Author: R. Borja

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