Evaluation of hematin-catalyzed Orange II degradation as a potential alternative to horseradish peroxidase
The catalytic performance of hematin was evaluated for the decolorization of solutions of the monoazoic textile dye Orange II in comparison to horseradish peroxidase (HRP) by means of response surface methodology. Conversions were affected mostly by the pH of the medium, followed by the catalyst and...
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| Formato: | JOUR |
| Lenguaje: | English |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_09648305_v73_n_p60_Cordoba |
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todo:paper_09648305_v73_n_p60_Cordoba2023-10-03T15:54:54Z Evaluation of hematin-catalyzed Orange II degradation as a potential alternative to horseradish peroxidase Córdoba, A. Magario, I. Ferreira, M.L. Azo dye Decolorization Hematin Horseradish peroxidase Response surface methodology Activity recovery After-treatment Aliphatic hydrocarbons Alkaline pH Azo bond cleavage Catalytic performance Coupling product Decolorization Doehlert Dye degradation FT-IR spectrum Hematin Horse-radish peroxidase Molar ratio Orange II Organic radicals Peroxide concentration Response surface methodology Systematic study Temperature impact Textile dyes Alkalinity Azo dyes Biomimetics Catalysts Chemical oxygen demand Degradation Fourier transform infrared spectroscopy Hydrocarbons Oxidation Photodegradation Stripping (dyes) Surface properties Textile finishing catalysis catalyst chemical oxygen demand degradation dye enzyme activity hydrocarbon mineralization pH pollutant removal radical Armoracia rusticana The catalytic performance of hematin was evaluated for the decolorization of solutions of the monoazoic textile dye Orange II in comparison to horseradish peroxidase (HRP) by means of response surface methodology. Conversions were affected mostly by the pH of the medium, followed by the catalyst and peroxide concentrations, whereas temperature impact was negligible. Both catalysts removed more than 92% of the color from 75 mg l-1 solutions after 60 min. Catalytic performance was optimal at alkaline pH and low peroxide-to-dye molar ratio (2.5 for HRP and 5 for hematin). Conversion results suggest a catalatic route for activity recovery and a lower sensitivity of hematin to peroxide and organic radical attack. Chemical oxygen demand values revealed lack of mineralization after treatment. UV/visible and FTIR spectra of treated solutions confirmed azo bond cleavage and the presence of oxygenated aliphatic hydrocarbon moieties as main products with both catalysts, whereas in the case of HRP coupling products are also produced after 24 h. These results are presented for the first time for hematin as biomimetic of peroxidase for dye degradation with a systematic study of variables using the Doehlert array. As a result, hematin emerges as an effective alternative to HRP for azo-dyes removal. © 2012 Elsevier Ltd. JOUR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09648305_v73_n_p60_Cordoba |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| language |
English |
| orig_language_str_mv |
English |
| topic |
Azo dye Decolorization Hematin Horseradish peroxidase Response surface methodology Activity recovery After-treatment Aliphatic hydrocarbons Alkaline pH Azo bond cleavage Catalytic performance Coupling product Decolorization Doehlert Dye degradation FT-IR spectrum Hematin Horse-radish peroxidase Molar ratio Orange II Organic radicals Peroxide concentration Response surface methodology Systematic study Temperature impact Textile dyes Alkalinity Azo dyes Biomimetics Catalysts Chemical oxygen demand Degradation Fourier transform infrared spectroscopy Hydrocarbons Oxidation Photodegradation Stripping (dyes) Surface properties Textile finishing catalysis catalyst chemical oxygen demand degradation dye enzyme activity hydrocarbon mineralization pH pollutant removal radical Armoracia rusticana |
| spellingShingle |
Azo dye Decolorization Hematin Horseradish peroxidase Response surface methodology Activity recovery After-treatment Aliphatic hydrocarbons Alkaline pH Azo bond cleavage Catalytic performance Coupling product Decolorization Doehlert Dye degradation FT-IR spectrum Hematin Horse-radish peroxidase Molar ratio Orange II Organic radicals Peroxide concentration Response surface methodology Systematic study Temperature impact Textile dyes Alkalinity Azo dyes Biomimetics Catalysts Chemical oxygen demand Degradation Fourier transform infrared spectroscopy Hydrocarbons Oxidation Photodegradation Stripping (dyes) Surface properties Textile finishing catalysis catalyst chemical oxygen demand degradation dye enzyme activity hydrocarbon mineralization pH pollutant removal radical Armoracia rusticana Córdoba, A. Magario, I. Ferreira, M.L. Evaluation of hematin-catalyzed Orange II degradation as a potential alternative to horseradish peroxidase |
| topic_facet |
Azo dye Decolorization Hematin Horseradish peroxidase Response surface methodology Activity recovery After-treatment Aliphatic hydrocarbons Alkaline pH Azo bond cleavage Catalytic performance Coupling product Decolorization Doehlert Dye degradation FT-IR spectrum Hematin Horse-radish peroxidase Molar ratio Orange II Organic radicals Peroxide concentration Response surface methodology Systematic study Temperature impact Textile dyes Alkalinity Azo dyes Biomimetics Catalysts Chemical oxygen demand Degradation Fourier transform infrared spectroscopy Hydrocarbons Oxidation Photodegradation Stripping (dyes) Surface properties Textile finishing catalysis catalyst chemical oxygen demand degradation dye enzyme activity hydrocarbon mineralization pH pollutant removal radical Armoracia rusticana |
| description |
The catalytic performance of hematin was evaluated for the decolorization of solutions of the monoazoic textile dye Orange II in comparison to horseradish peroxidase (HRP) by means of response surface methodology. Conversions were affected mostly by the pH of the medium, followed by the catalyst and peroxide concentrations, whereas temperature impact was negligible. Both catalysts removed more than 92% of the color from 75 mg l-1 solutions after 60 min. Catalytic performance was optimal at alkaline pH and low peroxide-to-dye molar ratio (2.5 for HRP and 5 for hematin). Conversion results suggest a catalatic route for activity recovery and a lower sensitivity of hematin to peroxide and organic radical attack. Chemical oxygen demand values revealed lack of mineralization after treatment. UV/visible and FTIR spectra of treated solutions confirmed azo bond cleavage and the presence of oxygenated aliphatic hydrocarbon moieties as main products with both catalysts, whereas in the case of HRP coupling products are also produced after 24 h. These results are presented for the first time for hematin as biomimetic of peroxidase for dye degradation with a systematic study of variables using the Doehlert array. As a result, hematin emerges as an effective alternative to HRP for azo-dyes removal. © 2012 Elsevier Ltd. |
| format |
JOUR |
| author |
Córdoba, A. Magario, I. Ferreira, M.L. |
| author_facet |
Córdoba, A. Magario, I. Ferreira, M.L. |
| author_sort |
Córdoba, A. |
| title |
Evaluation of hematin-catalyzed Orange II degradation as a potential alternative to horseradish peroxidase |
| title_short |
Evaluation of hematin-catalyzed Orange II degradation as a potential alternative to horseradish peroxidase |
| title_full |
Evaluation of hematin-catalyzed Orange II degradation as a potential alternative to horseradish peroxidase |
| title_fullStr |
Evaluation of hematin-catalyzed Orange II degradation as a potential alternative to horseradish peroxidase |
| title_full_unstemmed |
Evaluation of hematin-catalyzed Orange II degradation as a potential alternative to horseradish peroxidase |
| title_sort |
evaluation of hematin-catalyzed orange ii degradation as a potential alternative to horseradish peroxidase |
| url |
http://hdl.handle.net/20.500.12110/paper_09648305_v73_n_p60_Cordoba |
| work_keys_str_mv |
AT cordobaa evaluationofhematincatalyzedorangeiidegradationasapotentialalternativetohorseradishperoxidase AT magarioi evaluationofhematincatalyzedorangeiidegradationasapotentialalternativetohorseradishperoxidase AT ferreiraml evaluationofhematincatalyzedorangeiidegradationasapotentialalternativetohorseradishperoxidase |
| _version_ |
1782028390056853504 |