Application of the Zimm-Bragg Model to the Removal of Azo Dyes with Pectin
In this work, the ability of pectin (Pec) to remove direct red 80 (DR80), Congo red (CR), methyl orange (MO), and methyl red (MR) was studied. The removal percentages under adequate pH and ionic strength conditions were as follows: DR80 (99.5%), CR (99.8%), MO (88.6%), and MR (68%), showing that thi...
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| Format: | Article |
| Language: | English |
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SAGE Publications
2021-01-01
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| Series: | Adsorption Science & Technology |
| Online Access: | http://dx.doi.org/10.1155/2021/4947959 |
| _version_ | 1797284089624002560 |
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| author | Juan Antonio Lozano-Álvarez Juan Jáuregui-Rincón Iliana E. Medina-Ramírez Rogelio Salinas-Gutiérrez Jorge Martín Alférez Chávez Guadalupe Javier Araiza-Arvilla |
| author_facet | Juan Antonio Lozano-Álvarez Juan Jáuregui-Rincón Iliana E. Medina-Ramírez Rogelio Salinas-Gutiérrez Jorge Martín Alférez Chávez Guadalupe Javier Araiza-Arvilla |
| author_sort | Juan Antonio Lozano-Álvarez |
| collection | DOAJ |
| description | In this work, the ability of pectin (Pec) to remove direct red 80 (DR80), Congo red (CR), methyl orange (MO), and methyl red (MR) was studied. The removal percentages under adequate pH and ionic strength conditions were as follows: DR80 (99.5%), CR (99.8%), MO (88.6%), and MR (68%), showing that this methodology is efficient to remove azo dyes. The proposed method included the addition of native Pec to the dye aqueous solution and the formation of a gel that occurred when a calcium salt solution was added. This gel retains the molecules adsorbed onto the molecular surface of Pec through hydrogen bonds and electrostatic and hydrophobic interactions. To our knowledge, it is the first time that the Zimm-Bragg model is used to describe the removal of azo dyes with native Pec. This model includes two parameters: Ku (nucleation constant), which is related to the tendency exerted by a dye molecule attached to the Pec to bind to other molecules present in the aqueous phase, and U (cooperativity parameter), which determines the aggregation capacity of the dye molecules already attached to the Pec. This model fits the experimental isotherms very well, suggesting that Pec binds single molecules and dye aggregates. The obtained results in the values of Ku ranged from 922 mol/kg (MR) to 1,157,462 mol/kg (CR), and U varied from 2.51 (MR) to 169.19 (MO). These results suggest that the use of Pec is a viable option to remove azo dyes from aqueous effluents and that the Zimm-Bragg model fits adequately the isotherms of dyes that have a high tendency to form aggregates. |
| first_indexed | 2024-03-07T17:43:53Z |
| format | Article |
| id | doaj.art-5f0826116a2342b8ad1670f4e1c8162f |
| institution | Directory Open Access Journal |
| issn | 2048-4038 |
| language | English |
| last_indexed | 2024-03-07T17:43:53Z |
| publishDate | 2021-01-01 |
| publisher | SAGE Publications |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-5f0826116a2342b8ad1670f4e1c8162f2024-03-02T15:37:23ZengSAGE PublicationsAdsorption Science & Technology2048-40382021-01-01202110.1155/2021/4947959Application of the Zimm-Bragg Model to the Removal of Azo Dyes with PectinJuan Antonio Lozano-Álvarez0Juan Jáuregui-Rincón1Iliana E. Medina-Ramírez2Rogelio Salinas-Gutiérrez3Jorge Martín Alférez Chávez4Guadalupe Javier Araiza-Arvilla5Department of Biochemical EngineeringDepartment of Biochemical EngineeringDepartment of ChemistryDepartment of StatisticsDepartment of Biochemical EngineeringDepartment of Biochemical EngineeringIn this work, the ability of pectin (Pec) to remove direct red 80 (DR80), Congo red (CR), methyl orange (MO), and methyl red (MR) was studied. The removal percentages under adequate pH and ionic strength conditions were as follows: DR80 (99.5%), CR (99.8%), MO (88.6%), and MR (68%), showing that this methodology is efficient to remove azo dyes. The proposed method included the addition of native Pec to the dye aqueous solution and the formation of a gel that occurred when a calcium salt solution was added. This gel retains the molecules adsorbed onto the molecular surface of Pec through hydrogen bonds and electrostatic and hydrophobic interactions. To our knowledge, it is the first time that the Zimm-Bragg model is used to describe the removal of azo dyes with native Pec. This model includes two parameters: Ku (nucleation constant), which is related to the tendency exerted by a dye molecule attached to the Pec to bind to other molecules present in the aqueous phase, and U (cooperativity parameter), which determines the aggregation capacity of the dye molecules already attached to the Pec. This model fits the experimental isotherms very well, suggesting that Pec binds single molecules and dye aggregates. The obtained results in the values of Ku ranged from 922 mol/kg (MR) to 1,157,462 mol/kg (CR), and U varied from 2.51 (MR) to 169.19 (MO). These results suggest that the use of Pec is a viable option to remove azo dyes from aqueous effluents and that the Zimm-Bragg model fits adequately the isotherms of dyes that have a high tendency to form aggregates.http://dx.doi.org/10.1155/2021/4947959 |
| spellingShingle | Juan Antonio Lozano-Álvarez Juan Jáuregui-Rincón Iliana E. Medina-Ramírez Rogelio Salinas-Gutiérrez Jorge Martín Alférez Chávez Guadalupe Javier Araiza-Arvilla Application of the Zimm-Bragg Model to the Removal of Azo Dyes with Pectin Adsorption Science & Technology |
| title | Application of the Zimm-Bragg Model to the Removal of Azo Dyes with Pectin |
| title_full | Application of the Zimm-Bragg Model to the Removal of Azo Dyes with Pectin |
| title_fullStr | Application of the Zimm-Bragg Model to the Removal of Azo Dyes with Pectin |
| title_full_unstemmed | Application of the Zimm-Bragg Model to the Removal of Azo Dyes with Pectin |
| title_short | Application of the Zimm-Bragg Model to the Removal of Azo Dyes with Pectin |
| title_sort | application of the zimm bragg model to the removal of azo dyes with pectin |
| url | http://dx.doi.org/10.1155/2021/4947959 |
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