Sulfide removal using ozone as an oxidizing agent in tannery wastewater
In this study, the removal of sulfides in wastewater from the process of peeling or depilating skins was evaluated, using ozone as an oxidizing agent. The effect of the initial pH on the removal process was determined, for this purpose a completely randomized experimental design was used, in which t...
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| Format: | Online |
| Language: | spa |
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Universidad Pedagógica y Tecnológica de Colombia
2019
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| Online Access: | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/9081 |
| _version_ | 1801706095801008128 |
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| author | Umbarila-Ortega, María Fernanda Prado-Rodríguez, Juan Sebastián Agudelo-Valencia, Rafael Nikolay |
| author_facet | Umbarila-Ortega, María Fernanda Prado-Rodríguez, Juan Sebastián Agudelo-Valencia, Rafael Nikolay |
| author_sort | Umbarila-Ortega, María Fernanda |
| collection | OJS |
| description | In this study, the removal of sulfides in wastewater from the process of peeling or depilating skins was evaluated, using ozone as an oxidizing agent. The effect of the initial pH on the removal process was determined, for this purpose a completely randomized experimental design was used, in which the pH of the water was varied between 10, 11, 12 and 13, the ozone was dosed at a rate 0.5 g h-1 for a period of 3 hours taking samples every 30 minutes. The tests were performed for the real wastewater, supplied by a tannery and synthetic wastewater, in order to compare the removal achieved in each case. The analysis of the results obtained showed that the highest removal was achieved at pH 11 in the actual wastewater, reaching a value of 77.78%, approximately 39% higher than that reached at the same pH for the synthetic wastewater. The kinetics of the process were also evaluated, obtaining that the results are adjusted to a kinetic of pseudo first order for which the kinetic coefficient was -0,0001 s-1, finally, it was observed that after each test there was a decrease pH, which confirms what chemically should happen, formation of H2SO4 by the oxidation of sulphides to sulfates. Finally, it is concluded that the removal of sulfides using ozone is a technique applicable for alkaline pH, allowing to reduce oxidation times and becoming a viable alternative to apply in the leather tanning industry. |
| format | Online |
| id | oai:oai.revistas.uptc.edu.co:article-9081 |
| institution | Revista Facultad de Ingeniería |
| language | spa |
| publishDate | 2019 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia |
| record_format | ojs |
| spelling | oai:oai.revistas.uptc.edu.co:article-90812021-07-13T02:26:09Z Sulfide removal using ozone as an oxidizing agent in tannery wastewater Remoción de sulfuro empleando ozono como agente oxidante en aguas residuales de curtiembres Umbarila-Ortega, María Fernanda Prado-Rodríguez, Juan Sebastián Agudelo-Valencia, Rafael Nikolay advanced oxidation clearing ozone removal sulfur tanning curtiembre oxidación avanzada ozono pelambre remoción sulfuro In this study, the removal of sulfides in wastewater from the process of peeling or depilating skins was evaluated, using ozone as an oxidizing agent. The effect of the initial pH on the removal process was determined, for this purpose a completely randomized experimental design was used, in which the pH of the water was varied between 10, 11, 12 and 13, the ozone was dosed at a rate 0.5 g h-1 for a period of 3 hours taking samples every 30 minutes. The tests were performed for the real wastewater, supplied by a tannery and synthetic wastewater, in order to compare the removal achieved in each case. The analysis of the results obtained showed that the highest removal was achieved at pH 11 in the actual wastewater, reaching a value of 77.78%, approximately 39% higher than that reached at the same pH for the synthetic wastewater. The kinetics of the process were also evaluated, obtaining that the results are adjusted to a kinetic of pseudo first order for which the kinetic coefficient was -0,0001 s-1, finally, it was observed that after each test there was a decrease pH, which confirms what chemically should happen, formation of H2SO4 by the oxidation of sulphides to sulfates. Finally, it is concluded that the removal of sulfides using ozone is a technique applicable for alkaline pH, allowing to reduce oxidation times and becoming a viable alternative to apply in the leather tanning industry. En este estudio se evaluó la remoción de sulfuros en aguas residuales del proceso de pelambre o depilado de pieles, utilizando ozono como agente oxidante. Se determinó el efecto del pH inicial sobre el proceso de remoción, para este fin se usó un diseño experimental completamente al azar, en el cual el pH del agua se varió entre 10, 11, 12 y 13, el ozono fue dosificado a una tasa de 0,5 g h-1 por un periodo de 3 horas tomando muestras cada 30 minutos. Los ensayos fueron realizados para el agua residual real, suministrada por una curtiembre y agua residual sintética, a fin de comparar la remoción alcanzada en cada caso. El análisis de los resultados obtenidos permitió señalar que la mayor remoción se logró a pH 11 en el agua residual real, alcanzando un valor de 77,78%, aproximadamente 39% superior al alcanzado al mismo pH para el agua residual sintética. También se evaluó la cinética del proceso, obteniendo que los resultados se ajustan a una cinética de pseudo primer orden para la cual el coeficiente cinético fue de -0,0001 s-1, por último, se observó que después de cada ensayo se presentó disminución pH, lo cual confirma lo que químicamente debería suceder, formación de H2SO4 por la oxidación de sulfuros a sulfatos. Finalmente, se concluye que la remoción de sulfuros empleando ozono es una técnica aplicable para pH alcalino, permitiendo reducir tiempos de oxidación y convirtiéndose en una alternativa viable para aplicar en la industria del curtido de pieles. Universidad Pedagógica y Tecnológica de Colombia 2019-04-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research investigación application/pdf application/xml https://revistas.uptc.edu.co/index.php/ingenieria/article/view/9081 10.19053/01211129.v28.n51.2019.9081 Revista Facultad de Ingeniería; Vol. 28 No. 51 (2019); 25-38 Revista Facultad de Ingeniería; Vol. 28 Núm. 51 (2019); 25-38 2357-5328 0121-1129 spa https://revistas.uptc.edu.co/index.php/ingenieria/article/view/9081/7600 https://revistas.uptc.edu.co/index.php/ingenieria/article/view/9081/7899 https://revistas.uptc.edu.co/index.php/ingenieria/article/view/9081/7912 N.A. N.A. |
| spellingShingle | advanced oxidation clearing ozone removal sulfur tanning curtiembre oxidación avanzada ozono pelambre remoción sulfuro Umbarila-Ortega, María Fernanda Prado-Rodríguez, Juan Sebastián Agudelo-Valencia, Rafael Nikolay Sulfide removal using ozone as an oxidizing agent in tannery wastewater |
| title | Sulfide removal using ozone as an oxidizing agent in tannery wastewater |
| title_alt | Remoción de sulfuro empleando ozono como agente oxidante en aguas residuales de curtiembres |
| title_full | Sulfide removal using ozone as an oxidizing agent in tannery wastewater |
| title_fullStr | Sulfide removal using ozone as an oxidizing agent in tannery wastewater |
| title_full_unstemmed | Sulfide removal using ozone as an oxidizing agent in tannery wastewater |
| title_short | Sulfide removal using ozone as an oxidizing agent in tannery wastewater |
| title_sort | sulfide removal using ozone as an oxidizing agent in tannery wastewater |
| topic | advanced oxidation clearing ozone removal sulfur tanning curtiembre oxidación avanzada ozono pelambre remoción sulfuro |
| topic_facet | advanced oxidation clearing ozone removal sulfur tanning curtiembre oxidación avanzada ozono pelambre remoción sulfuro |
| url | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/9081 |
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