Oxidation of Cylindrospermopsin by Fenton Process: A Bench-Scale Study of the Effects of Dose and Ratio of H<sub>2</sub>O<sub>2</sub> and Fe(II) and Kinetics
The cyanotoxin cylindrospermopsin (CYN) has become a significant environmental and human health concern due to its high toxicological potential and widespread distribution. High concentrations of cyanotoxins may be produced during cyanobacterial blooms. Special attention is required when these bloom...
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| Format: | Article |
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MDPI AG
2021-08-01
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| Series: | Toxins |
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| Online Access: | https://www.mdpi.com/2072-6651/13/9/604 |
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| author | Matheus Almeida Ferreira Cristina Celia Silveira Brandão Yovanka Pérez Ginoris |
| author_facet | Matheus Almeida Ferreira Cristina Celia Silveira Brandão Yovanka Pérez Ginoris |
| author_sort | Matheus Almeida Ferreira |
| collection | DOAJ |
| description | The cyanotoxin cylindrospermopsin (CYN) has become a significant environmental and human health concern due to its high toxicological potential and widespread distribution. High concentrations of cyanotoxins may be produced during cyanobacterial blooms. Special attention is required when these blooms occur in sources of water intended for human consumption since extracellular cyanotoxins are not effectively removed by conventional water treatments, leading to the need for advanced water treatment technologies such as the Fenton process to produce safe water. Thus, the present study aimed to investigate the application of the Fenton process for the degradation of CYN at bench-scale. The oxidation of CYN was evaluated by Fenton reaction at H<sub>2</sub>O<sub>2</sub>/Fe(II) molar ratio in a range of 0.4 to 4.0, with the highest degradation of about 81% at molar ratio of 0.4. Doubling the concentrations of reactants for the optimized H<sub>2</sub>O<sub>2</sub>/Fe(II) molar ratio, the CYN degradation efficiency reached 91%. Under the conditions studied, CYN degradation by the Fenton process followed a pseudo-first-order kinetic model with an apparent constant rate ranging from 0.813 × 10<sup>−3</sup> to 1.879 × 10<sup>−3</sup> s<sup>−1</sup>. |
| first_indexed | 2024-03-10T07:09:43Z |
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| id | doaj.art-78e5839f018e4ce78015c754d9b66262 |
| institution | Directory Open Access Journal |
| issn | 2072-6651 |
| language | English |
| last_indexed | 2024-03-10T07:09:43Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Toxins |
| spelling | doaj.art-78e5839f018e4ce78015c754d9b662622023-11-22T15:30:49ZengMDPI AGToxins2072-66512021-08-0113960410.3390/toxins13090604Oxidation of Cylindrospermopsin by Fenton Process: A Bench-Scale Study of the Effects of Dose and Ratio of H<sub>2</sub>O<sub>2</sub> and Fe(II) and KineticsMatheus Almeida Ferreira0Cristina Celia Silveira Brandão1Yovanka Pérez Ginoris2Environmental Technology and Water Resources Postgraduation Program, Department of Civil and Environmental Engineering, University of Brasília, Brasilia 70910-900, BrazilEnvironmental Technology and Water Resources Postgraduation Program, Department of Civil and Environmental Engineering, University of Brasília, Brasilia 70910-900, BrazilEnvironmental Technology and Water Resources Postgraduation Program, Department of Civil and Environmental Engineering, University of Brasília, Brasilia 70910-900, BrazilThe cyanotoxin cylindrospermopsin (CYN) has become a significant environmental and human health concern due to its high toxicological potential and widespread distribution. High concentrations of cyanotoxins may be produced during cyanobacterial blooms. Special attention is required when these blooms occur in sources of water intended for human consumption since extracellular cyanotoxins are not effectively removed by conventional water treatments, leading to the need for advanced water treatment technologies such as the Fenton process to produce safe water. Thus, the present study aimed to investigate the application of the Fenton process for the degradation of CYN at bench-scale. The oxidation of CYN was evaluated by Fenton reaction at H<sub>2</sub>O<sub>2</sub>/Fe(II) molar ratio in a range of 0.4 to 4.0, with the highest degradation of about 81% at molar ratio of 0.4. Doubling the concentrations of reactants for the optimized H<sub>2</sub>O<sub>2</sub>/Fe(II) molar ratio, the CYN degradation efficiency reached 91%. Under the conditions studied, CYN degradation by the Fenton process followed a pseudo-first-order kinetic model with an apparent constant rate ranging from 0.813 × 10<sup>−3</sup> to 1.879 × 10<sup>−3</sup> s<sup>−1</sup>.https://www.mdpi.com/2072-6651/13/9/604cylindrospermopsin removaladvanced oxidation processesFenton process |
| spellingShingle | Matheus Almeida Ferreira Cristina Celia Silveira Brandão Yovanka Pérez Ginoris Oxidation of Cylindrospermopsin by Fenton Process: A Bench-Scale Study of the Effects of Dose and Ratio of H<sub>2</sub>O<sub>2</sub> and Fe(II) and Kinetics Toxins cylindrospermopsin removal advanced oxidation processes Fenton process |
| title | Oxidation of Cylindrospermopsin by Fenton Process: A Bench-Scale Study of the Effects of Dose and Ratio of H<sub>2</sub>O<sub>2</sub> and Fe(II) and Kinetics |
| title_full | Oxidation of Cylindrospermopsin by Fenton Process: A Bench-Scale Study of the Effects of Dose and Ratio of H<sub>2</sub>O<sub>2</sub> and Fe(II) and Kinetics |
| title_fullStr | Oxidation of Cylindrospermopsin by Fenton Process: A Bench-Scale Study of the Effects of Dose and Ratio of H<sub>2</sub>O<sub>2</sub> and Fe(II) and Kinetics |
| title_full_unstemmed | Oxidation of Cylindrospermopsin by Fenton Process: A Bench-Scale Study of the Effects of Dose and Ratio of H<sub>2</sub>O<sub>2</sub> and Fe(II) and Kinetics |
| title_short | Oxidation of Cylindrospermopsin by Fenton Process: A Bench-Scale Study of the Effects of Dose and Ratio of H<sub>2</sub>O<sub>2</sub> and Fe(II) and Kinetics |
| title_sort | oxidation of cylindrospermopsin by fenton process a bench scale study of the effects of dose and ratio of h sub 2 sub o sub 2 sub and fe ii and kinetics |
| topic | cylindrospermopsin removal advanced oxidation processes Fenton process |
| url | https://www.mdpi.com/2072-6651/13/9/604 |
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