Fenton and Photo-Fenton oxidation of tannery wastewater - DOI: 10.4025/actascitechnol.v25i1.2254
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Acta scientiarum. Technology (Online) |
Texto Completo: | http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2254 |
Resumo: | Fenton and Photo-Fenton processes are attractive alternatives in effluent treatment, especially when applied to recalcitrant compounds. The aim of this work was to evaluate the efficiency of Fenton and Photo-Fenton processes for the treatment of wastewater from leather industry, investigating the reduction of COD, ammoniac nitrogen concentration and toxicity in treated wastewaters. The results showed that the kinetic of degradation by Fenton and Photo-Fenton reactions can be divided in two stages: an initial fast process, where approximately 70% of the COD reduction takes place, followed, by a slow process, where a reaction takes up to 4 hours, resulting in about 90% of COD reduction. Different mass ratios of Fé2+/H2O2 were tested and the results showed that the efficiency of the Fenton and photo-Fenton reactions increases from 65 to 90% as the concentration of hydroxyl radicals (•OH) increases. No significant difference in the ammoniac nitrogen amount reduction for the Fenton and Photo-Fenton processes was observed, either before or after coagulation. The ammonia removal was ascribed to the oxidation of nitrogen organic compounds, possibly forming N2 and nitrate ions. The toxicity biossays using Artemia salina decreased as the wastewater was degraded and increased if the hydrogen peroxide residue at the end of the reaction was high. |
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Fenton and Photo-Fenton oxidation of tannery wastewater - DOI: 10.4025/actascitechnol.v25i1.2254Oxidação em processos Fenton e Foto-Fenton em efluentes de curtumes - DOI: 10.4025/actascitechnol.v25i1.2254efluente de curtumesreação Fentonreação foto-Fentontoxicidade3.00.00.00-9 EngenhariasFenton and Photo-Fenton processes are attractive alternatives in effluent treatment, especially when applied to recalcitrant compounds. The aim of this work was to evaluate the efficiency of Fenton and Photo-Fenton processes for the treatment of wastewater from leather industry, investigating the reduction of COD, ammoniac nitrogen concentration and toxicity in treated wastewaters. The results showed that the kinetic of degradation by Fenton and Photo-Fenton reactions can be divided in two stages: an initial fast process, where approximately 70% of the COD reduction takes place, followed, by a slow process, where a reaction takes up to 4 hours, resulting in about 90% of COD reduction. Different mass ratios of Fé2+/H2O2 were tested and the results showed that the efficiency of the Fenton and photo-Fenton reactions increases from 65 to 90% as the concentration of hydroxyl radicals (•OH) increases. No significant difference in the ammoniac nitrogen amount reduction for the Fenton and Photo-Fenton processes was observed, either before or after coagulation. The ammonia removal was ascribed to the oxidation of nitrogen organic compounds, possibly forming N2 and nitrate ions. The toxicity biossays using Artemia salina decreased as the wastewater was degraded and increased if the hydrogen peroxide residue at the end of the reaction was high.Os processos Fenton e Foto-fenton são alternativas atraentes no tratamento de efluentes, especialmente aplicados àqueles contendo compostos recalcitrantes. Neste trabalho foi avaliada a remoção de DQO e amônia durante o tratamento de efluentes de curtumes pelos processos Fenton e Foto-Fenton. A cinética de degradação foi dividida em dois estágios, sendo um processo inicial rápido, no qual 70% da DQO inicial é removida; seguido por uma etapa lenta que acontece em até 4 horas de reação, alcançando cerca de 90% de remoção da DQO inicial. Diferentes proporções mássicas Fé2+/H2O2 foram testadas e os resultados mostraram que a eficiência dos processos Fenton e Foto-Fenton aumenta de 65 até 90% à medida que a produção de radicais livres hidroxil aumenta. Nenhuma diferença apreciável na degradação de nitrogênio amoniacal foi observada entre os processos Fenton e Foto-Fenton, mesmo após a coagulação. A remoção de amônia foi atribuída à oxidação de compostos orgânicos, formando N2 e íons nitrato. A toxicidade do efluente tratado diminuiu até a dosagem de 9g/L de H2O2 e aumentou para maiores dosagens, devido ao residual peróxido de hidrogênio ou a formação de produtos oxidados mais tóxicos.Universidade Estadual De Maringá2008-04-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/225410.4025/actascitechnol.v25i1.2254Acta Scientiarum. Technology; Vol 25 No 1 (2003); 91-95Acta Scientiarum. Technology; v. 25 n. 1 (2003); 91-951806-25631807-8664reponame:Acta scientiarum. Technology (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2254/1348Dantas, Tirzhá Lins PortoJosé, Humberto JorgeMoreira, Regina de Fátima Peralta Munizinfo:eu-repo/semantics/openAccess2024-05-17T13:02:43Zoai:periodicos.uem.br/ojs:article/2254Revistahttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/indexPUBhttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/oai||actatech@uem.br1807-86641806-2563opendoar:2024-05-17T13:02:43Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Fenton and Photo-Fenton oxidation of tannery wastewater - DOI: 10.4025/actascitechnol.v25i1.2254 Oxidação em processos Fenton e Foto-Fenton em efluentes de curtumes - DOI: 10.4025/actascitechnol.v25i1.2254 |
title |
Fenton and Photo-Fenton oxidation of tannery wastewater - DOI: 10.4025/actascitechnol.v25i1.2254 |
spellingShingle |
Fenton and Photo-Fenton oxidation of tannery wastewater - DOI: 10.4025/actascitechnol.v25i1.2254 Dantas, Tirzhá Lins Porto efluente de curtumes reação Fenton reação foto-Fenton toxicidade 3.00.00.00-9 Engenharias |
title_short |
Fenton and Photo-Fenton oxidation of tannery wastewater - DOI: 10.4025/actascitechnol.v25i1.2254 |
title_full |
Fenton and Photo-Fenton oxidation of tannery wastewater - DOI: 10.4025/actascitechnol.v25i1.2254 |
title_fullStr |
Fenton and Photo-Fenton oxidation of tannery wastewater - DOI: 10.4025/actascitechnol.v25i1.2254 |
title_full_unstemmed |
Fenton and Photo-Fenton oxidation of tannery wastewater - DOI: 10.4025/actascitechnol.v25i1.2254 |
title_sort |
Fenton and Photo-Fenton oxidation of tannery wastewater - DOI: 10.4025/actascitechnol.v25i1.2254 |
author |
Dantas, Tirzhá Lins Porto |
author_facet |
Dantas, Tirzhá Lins Porto José, Humberto Jorge Moreira, Regina de Fátima Peralta Muniz |
author_role |
author |
author2 |
José, Humberto Jorge Moreira, Regina de Fátima Peralta Muniz |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Dantas, Tirzhá Lins Porto José, Humberto Jorge Moreira, Regina de Fátima Peralta Muniz |
dc.subject.por.fl_str_mv |
efluente de curtumes reação Fenton reação foto-Fenton toxicidade 3.00.00.00-9 Engenharias |
topic |
efluente de curtumes reação Fenton reação foto-Fenton toxicidade 3.00.00.00-9 Engenharias |
description |
Fenton and Photo-Fenton processes are attractive alternatives in effluent treatment, especially when applied to recalcitrant compounds. The aim of this work was to evaluate the efficiency of Fenton and Photo-Fenton processes for the treatment of wastewater from leather industry, investigating the reduction of COD, ammoniac nitrogen concentration and toxicity in treated wastewaters. The results showed that the kinetic of degradation by Fenton and Photo-Fenton reactions can be divided in two stages: an initial fast process, where approximately 70% of the COD reduction takes place, followed, by a slow process, where a reaction takes up to 4 hours, resulting in about 90% of COD reduction. Different mass ratios of Fé2+/H2O2 were tested and the results showed that the efficiency of the Fenton and photo-Fenton reactions increases from 65 to 90% as the concentration of hydroxyl radicals (•OH) increases. No significant difference in the ammoniac nitrogen amount reduction for the Fenton and Photo-Fenton processes was observed, either before or after coagulation. The ammonia removal was ascribed to the oxidation of nitrogen organic compounds, possibly forming N2 and nitrate ions. The toxicity biossays using Artemia salina decreased as the wastewater was degraded and increased if the hydrogen peroxide residue at the end of the reaction was high. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-04-15 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2254 10.4025/actascitechnol.v25i1.2254 |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2254 |
identifier_str_mv |
10.4025/actascitechnol.v25i1.2254 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2254/1348 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Estadual De Maringá |
publisher.none.fl_str_mv |
Universidade Estadual De Maringá |
dc.source.none.fl_str_mv |
Acta Scientiarum. Technology; Vol 25 No 1 (2003); 91-95 Acta Scientiarum. Technology; v. 25 n. 1 (2003); 91-95 1806-2563 1807-8664 reponame:Acta scientiarum. Technology (Online) instname:Universidade Estadual de Maringá (UEM) instacron:UEM |
instname_str |
Universidade Estadual de Maringá (UEM) |
instacron_str |
UEM |
institution |
UEM |
reponame_str |
Acta scientiarum. Technology (Online) |
collection |
Acta scientiarum. Technology (Online) |
repository.name.fl_str_mv |
Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM) |
repository.mail.fl_str_mv |
||actatech@uem.br |
_version_ |
1799315332087676928 |