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Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater
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| Zeitschriftentitel: | Molecules |
|---|---|
| Personen und Körperschaften: | , , , , |
| In: | Molecules, 24, 2019, 7, S. 1373 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
MDPI AG
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| Schlagwörter: |
| author_facet |
Mediavilla, Juan Jose Viña Perez, Begoña Fernandez Cordoba, Maria C. Fernandez de Espina, Julia Ayala Ania, Conchi O. Mediavilla, Juan Jose Viña Perez, Begoña Fernandez Cordoba, Maria C. Fernandez de Espina, Julia Ayala Ania, Conchi O. |
|---|---|
| author |
Mediavilla, Juan Jose Viña Perez, Begoña Fernandez Cordoba, Maria C. Fernandez de Espina, Julia Ayala Ania, Conchi O. |
| spellingShingle |
Mediavilla, Juan Jose Viña Perez, Begoña Fernandez Cordoba, Maria C. Fernandez de Espina, Julia Ayala Ania, Conchi O. Molecules Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater Chemistry (miscellaneous) Analytical Chemistry Organic Chemistry Physical and Theoretical Chemistry Molecular Medicine Drug Discovery Pharmaceutical Science |
| author_sort |
mediavilla, juan jose viña |
| spelling |
Mediavilla, Juan Jose Viña Perez, Begoña Fernandez Cordoba, Maria C. Fernandez de Espina, Julia Ayala Ania, Conchi O. 1420-3049 MDPI AG Chemistry (miscellaneous) Analytical Chemistry Organic Chemistry Physical and Theoretical Chemistry Molecular Medicine Drug Discovery Pharmaceutical Science http://dx.doi.org/10.3390/molecules24071373 <jats:p>We have explored the simultaneous degradation of cyanides and thiocyanate present in wastewaters from a cokemaking factory using photoassisted methods under varied illumination conditions (from simulated solar light to UV light). Overall, the photochemical degradation of cyanides was more efficient than that of thiocyanates, regardless of the illumination conditions, the effect being more pronounced in the absence of a photocatalyst. This is due to their different degradation mechanism that in the case of thiocyanates is dominated by fast recombination reactions and/or charge transfer reactions to electron scavengers. In all cases, cyanate, ammonia, nitrates, and nitrites were formed at different amounts depending on the illumination conditions. The conversion yield under simulated solar light was almost complete for cyanides and quite high for thiocyanates after 6 h of illumination. Regarding toxicity, photochemical oxidation at 254 nm and under simulated solar light decreased significantly the toxicity of the pristine wastewater, showing a correlation with the intensity of the irradiation source. This indicate that simulated light can be effectively used to reduce the toxicity of industrial effluents, opening an interesting perspective for optimizing cyanide detoxification systems based on natural light.</jats:p> Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater Molecules |
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| title |
Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater |
| title_unstemmed |
Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater |
| title_full |
Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater |
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Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater |
| title_full_unstemmed |
Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater |
| title_short |
Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater |
| title_sort |
photochemical degradation of cyanides and thiocyanates from an industrial wastewater |
| topic |
Chemistry (miscellaneous) Analytical Chemistry Organic Chemistry Physical and Theoretical Chemistry Molecular Medicine Drug Discovery Pharmaceutical Science |
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http://dx.doi.org/10.3390/molecules24071373 |
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2019 |
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1373 |
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<jats:p>We have explored the simultaneous degradation of cyanides and thiocyanate present in wastewaters from a cokemaking factory using photoassisted methods under varied illumination conditions (from simulated solar light to UV light). Overall, the photochemical degradation of cyanides was more efficient than that of thiocyanates, regardless of the illumination conditions, the effect being more pronounced in the absence of a photocatalyst. This is due to their different degradation mechanism that in the case of thiocyanates is dominated by fast recombination reactions and/or charge transfer reactions to electron scavengers. In all cases, cyanate, ammonia, nitrates, and nitrites were formed at different amounts depending on the illumination conditions. The conversion yield under simulated solar light was almost complete for cyanides and quite high for thiocyanates after 6 h of illumination. Regarding toxicity, photochemical oxidation at 254 nm and under simulated solar light decreased significantly the toxicity of the pristine wastewater, showing a correlation with the intensity of the irradiation source. This indicate that simulated light can be effectively used to reduce the toxicity of industrial effluents, opening an interesting perspective for optimizing cyanide detoxification systems based on natural light.</jats:p> |
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| author | Mediavilla, Juan Jose Viña, Perez, Begoña Fernandez, Cordoba, Maria C. Fernandez de, Espina, Julia Ayala, Ania, Conchi O. |
| author_facet | Mediavilla, Juan Jose Viña, Perez, Begoña Fernandez, Cordoba, Maria C. Fernandez de, Espina, Julia Ayala, Ania, Conchi O., Mediavilla, Juan Jose Viña, Perez, Begoña Fernandez, Cordoba, Maria C. Fernandez de, Espina, Julia Ayala, Ania, Conchi O. |
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| description | <jats:p>We have explored the simultaneous degradation of cyanides and thiocyanate present in wastewaters from a cokemaking factory using photoassisted methods under varied illumination conditions (from simulated solar light to UV light). Overall, the photochemical degradation of cyanides was more efficient than that of thiocyanates, regardless of the illumination conditions, the effect being more pronounced in the absence of a photocatalyst. This is due to their different degradation mechanism that in the case of thiocyanates is dominated by fast recombination reactions and/or charge transfer reactions to electron scavengers. In all cases, cyanate, ammonia, nitrates, and nitrites were formed at different amounts depending on the illumination conditions. The conversion yield under simulated solar light was almost complete for cyanides and quite high for thiocyanates after 6 h of illumination. Regarding toxicity, photochemical oxidation at 254 nm and under simulated solar light decreased significantly the toxicity of the pristine wastewater, showing a correlation with the intensity of the irradiation source. This indicate that simulated light can be effectively used to reduce the toxicity of industrial effluents, opening an interesting perspective for optimizing cyanide detoxification systems based on natural light.</jats:p> |
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| spelling | Mediavilla, Juan Jose Viña Perez, Begoña Fernandez Cordoba, Maria C. Fernandez de Espina, Julia Ayala Ania, Conchi O. 1420-3049 MDPI AG Chemistry (miscellaneous) Analytical Chemistry Organic Chemistry Physical and Theoretical Chemistry Molecular Medicine Drug Discovery Pharmaceutical Science http://dx.doi.org/10.3390/molecules24071373 <jats:p>We have explored the simultaneous degradation of cyanides and thiocyanate present in wastewaters from a cokemaking factory using photoassisted methods under varied illumination conditions (from simulated solar light to UV light). Overall, the photochemical degradation of cyanides was more efficient than that of thiocyanates, regardless of the illumination conditions, the effect being more pronounced in the absence of a photocatalyst. This is due to their different degradation mechanism that in the case of thiocyanates is dominated by fast recombination reactions and/or charge transfer reactions to electron scavengers. In all cases, cyanate, ammonia, nitrates, and nitrites were formed at different amounts depending on the illumination conditions. The conversion yield under simulated solar light was almost complete for cyanides and quite high for thiocyanates after 6 h of illumination. Regarding toxicity, photochemical oxidation at 254 nm and under simulated solar light decreased significantly the toxicity of the pristine wastewater, showing a correlation with the intensity of the irradiation source. This indicate that simulated light can be effectively used to reduce the toxicity of industrial effluents, opening an interesting perspective for optimizing cyanide detoxification systems based on natural light.</jats:p> Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater Molecules |
| spellingShingle | Mediavilla, Juan Jose Viña, Perez, Begoña Fernandez, Cordoba, Maria C. Fernandez de, Espina, Julia Ayala, Ania, Conchi O., Molecules, Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater, Chemistry (miscellaneous), Analytical Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Molecular Medicine, Drug Discovery, Pharmaceutical Science |
| title | Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater |
| title_full | Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater |
| title_fullStr | Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater |
| title_full_unstemmed | Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater |
| title_short | Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater |
| title_sort | photochemical degradation of cyanides and thiocyanates from an industrial wastewater |
| title_unstemmed | Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater |
| topic | Chemistry (miscellaneous), Analytical Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Molecular Medicine, Drug Discovery, Pharmaceutical Science |
| url | http://dx.doi.org/10.3390/molecules24071373 |