Reatores de discos rotativos e tubular helicoidal na degradação fotocatalítica de diclofenaco e carga orgânica de efluente hospitalar
Ano de defesa: | 2009 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal de Santa Maria
|
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Química
|
Departamento: |
Química
|
País: |
BR
|
Palavras-chave em Português: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://repositorio.ufsm.br/handle/1/10454 |
Resumo: | In this study, the advanced oxidation process heterogeneous photocatalysis were used for the degradation of diclofenac and decrease of the organic load in the effluent from the emergency sector (PA) of the University Hospital of Santa Maria (HUSM). Two different photoreactors were investigated: the rotative discs reactor, which employed TiO2 immobilized on ceramic discs (1800 mL), and the tubular helicoidal reactor (1000 mL), employing TiO2 in suspension. Both used as radiation source a mercury vapor lamp of medium pressure (125 W and 401 W m-2) that propitiated flow of photons of 2.22 x 10-6 ± 1.30 x10-7 mol s-1 and 1.77 x 10-6 ± 1.45 x 10-7 mol s-1 for the rotative discs and tubular helicoidal reactors, respectively. Potassium ferrioxalate was used as actinometer for these measurements. The experimental conditions were optimized by applying Response Surface Methodology. Reduction of chemical oxygen demand (COD) after 60 min was used for this evaluation. The temperature of the reactors was kept constant in 30 °C, while pH and discs rotation velocity; and pH, mass of TiO2 in suspension and recirculation rate were the variables for rotative discs and tubular helicoidal reactors, respectively. The better conditions found were: pH 5 and 9 rpm for rotative discs reactor (COD reduction of 30%) and pH 3, 600 mg L-1 TiO2 and recirculation rate of 15 L h-1 (COD reduction of 45%) for the tubular helicoidal reactor. The photonic efficiency of the rotative disc reactor was 2.69 ± 0.23%, lower than the 10.54 ± 0.37% reached by the tubular helicoidal. The efficiency of degradation of diclofenac in hospital effluent was assessed through high performance liquid chromatography with diode array detector (HPLC-DAD, lmáx = 279 nm), a mobile phase MeOH:Aqueous Na3PO4 0.01 mol L-1 (H3PO4 , pH 6) 70:30 (v/v). The diclofenac added to the hospital effluent (0.1 mg L-1) was 100% e 97% degraded by using using the rotative disc and tubular helicoidal reactors, respectively. Diclofenac environmental exposure in the hospital effluent was also carried out by mean of HPLC-DAD. Samples collected during 7 days were analyzed. Diclofenac concentration ranged from 0.8 to 3.6 mg L-1 (average: 1.7 mg L-1). The acute toxicity (LC50) of the hospital effluent and diclofenac solutions was evaluated by using bioassay Artemia salina. Inhibition of toxicity caused by the treatment of hospital wastewater using the rotative disc and tubular helicoidal reactors was 58% and 55%, respectively. Concerning diclofenac aqueous solutions, no mortality of Artemia salina was observed, which shows that this compound presents no acute toxicity for this bioindicator. |
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2017-05-182017-05-182009-07-28MINETTO, Luciane. Rotative discs and tubular helicoidal reactors in the photocatalytic degradation of diclofenac and organic load of hospital effluent. 2009. 86 f. Dissertação (Mestrado em Química) - Universidade Federal de Santa Maria, Santa Maria, 2009.http://repositorio.ufsm.br/handle/1/10454In this study, the advanced oxidation process heterogeneous photocatalysis were used for the degradation of diclofenac and decrease of the organic load in the effluent from the emergency sector (PA) of the University Hospital of Santa Maria (HUSM). Two different photoreactors were investigated: the rotative discs reactor, which employed TiO2 immobilized on ceramic discs (1800 mL), and the tubular helicoidal reactor (1000 mL), employing TiO2 in suspension. Both used as radiation source a mercury vapor lamp of medium pressure (125 W and 401 W m-2) that propitiated flow of photons of 2.22 x 10-6 ± 1.30 x10-7 mol s-1 and 1.77 x 10-6 ± 1.45 x 10-7 mol s-1 for the rotative discs and tubular helicoidal reactors, respectively. Potassium ferrioxalate was used as actinometer for these measurements. The experimental conditions were optimized by applying Response Surface Methodology. Reduction of chemical oxygen demand (COD) after 60 min was used for this evaluation. The temperature of the reactors was kept constant in 30 °C, while pH and discs rotation velocity; and pH, mass of TiO2 in suspension and recirculation rate were the variables for rotative discs and tubular helicoidal reactors, respectively. The better conditions found were: pH 5 and 9 rpm for rotative discs reactor (COD reduction of 30%) and pH 3, 600 mg L-1 TiO2 and recirculation rate of 15 L h-1 (COD reduction of 45%) for the tubular helicoidal reactor. The photonic efficiency of the rotative disc reactor was 2.69 ± 0.23%, lower than the 10.54 ± 0.37% reached by the tubular helicoidal. The efficiency of degradation of diclofenac in hospital effluent was assessed through high performance liquid chromatography with diode array detector (HPLC-DAD, lmáx = 279 nm), a mobile phase MeOH:Aqueous Na3PO4 0.01 mol L-1 (H3PO4 , pH 6) 70:30 (v/v). The diclofenac added to the hospital effluent (0.1 mg L-1) was 100% e 97% degraded by using using the rotative disc and tubular helicoidal reactors, respectively. Diclofenac environmental exposure in the hospital effluent was also carried out by mean of HPLC-DAD. Samples collected during 7 days were analyzed. Diclofenac concentration ranged from 0.8 to 3.6 mg L-1 (average: 1.7 mg L-1). The acute toxicity (LC50) of the hospital effluent and diclofenac solutions was evaluated by using bioassay Artemia salina. Inhibition of toxicity caused by the treatment of hospital wastewater using the rotative disc and tubular helicoidal reactors was 58% and 55%, respectively. Concerning diclofenac aqueous solutions, no mortality of Artemia salina was observed, which shows that this compound presents no acute toxicity for this bioindicator.Neste trabalho estudou-se a aplicação de processo avançado de oxidação via fotocatálise heterogênea, na degradação de diclofenaco e da carga orgânica do efluente do Pronto Atendimento do Hospital Universitário de Santa Maria (PA-HUSM). Para isto foram utilizados dois fotorreatores, sendo um deles de discos rotativos, com TiO2 imobilizado em discos de cerâmica e capacidade de 1800 mL; e, o outro, tubular helicoidal, com TiO2 em suspensão e capacidade de 1000 mL. Em ambos os fotorreatores foi utilizada radiação emitida por lâmpada de vapor de mercúrio de média pressão (125 W e 401 W m-2). A fim de medir o fluxo de fótons emitido pela lâmpada foi utilizado o actinômetro ferrioxalato de potássio. Os fluxos de fótons medidos foram de 2,22x10-6 ± 1,30x10-7 mol s-1 e 1,77x10-6 ± 1,45x10-7 mol s-1 para os reatores de discos rotativos e tubular helicoidal, espectivamente. Foi feita a adequação da eficiência dos reatores por meio da redução da demanda química de oxigênio (DQO), aplicando-se metodologia de superfície de resposta (RSM). Ambos os fotorreatores foram mantidos à temperatura de 30 °C e o tempo de tratamento foi de 60 min. Para o fotorreator de discos rotativos, a melhor condição otimizada foi em pH 5 e 9 rpm, obtendo-se abatimento de 30% da DQO. No fotorreator tubular helicoidal obteve-se redução de 45% da DQO utilizando-se pH 3, suspensão de 600 mg L-1 de TiO2 e taxa de recirculação de 15 L h-1. A eficiência fotônica foi menor no fotorreator de disco rotativos 2,69 ± 0,23%, comparada com 10,54 ± 0,37% do fotorreator tubular helicoidal. A eficiência de degradação do diclofenaco no efluente hospitalar foi avaliada através de determinação analítica por cromatografia líquida com detector de arranjo de diodos (HPLC-DAD), lmáx = 279 nm, fase móvel MeOH:tampão Na3PO4 0,01 mol L-1(H3PO4, pH 6), na proporção de 70:30. O diclofenaco adicionado ao efluente hospitalar (0,1 mg L-1) foi 100% degradado utilizando-se o fotorreator de discos rotativos, e, usando-se o fotorreator tubular helicoidal, a degradação do diclofenaco foi de 97%. A determinação de diclofenaco no efluente hospitalar foi feita por HPLC-DAD, em amostras coletadas durante 7 dias. As concentrações de diclofenaco variaram de 0,8 a 3,6 mg L-1, com média de 1,7 mg L-1. A toxicidade aguda (LC50) do efluente hospitalar e de soluções de diclofenaco foi avaliada por meio de teste com o bioindicador Artemia salina. A inibição da toxicidade aguda no tratamento do efluente hospitalar utilizando-se o fotorreator de discos rotativos foi de 58%; e, de 55%, com o fotorreator tubular helicoidal. Nos ensaios de toxicidade com soluções aquosas de diclofenaco não ocorreu mortalidade da Artemia salina, o que demonstra que este fármaco não apresenta toxicidade aguda para esse bioindicador, entretanto não são conhecidos os efeitos de toxicidade crônica pra este bioindicador.Conselho Nacional de Desenvolvimento Científico e Tecnológicoapplication/pdfporUniversidade Federal de Santa MariaPrograma de Pós-Graduação em QuímicaUFSMBRQuímicaQuímicaQuímica analíticaEfluentes hospitalaresFotorreatoresCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICAReatores de discos rotativos e tubular helicoidal na degradação fotocatalítica de diclofenaco e carga orgânica de efluente hospitalarRotative discs and tubular helicoidal reactors in the photocatalytic degradation of diclofenac and organic load of hospital effluentinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisMartins, Ayrton Figueiredohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787438A0Machado, ênio Leandrohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4784684U8Vasconcelos, Tibiriçá Gonçalveshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4705790P8http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4254225E8Minetto, Luciane100600000000400500500500300ade6000d-a348-4d49-a531-6500a65a153af775fb47-cff7-44de-aa52-36571057f2c883525661-81e2-4c1d-bbde-36daa91d8442f36ad0ab-009d-4071-a573-195334263a37info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALMINETTO, LUCIANE.pdfapplication/pdf2298633http://repositorio.ufsm.br/bitstream/1/10454/1/MINETTO%2c%20LUCIANE.pdf93ad03cbbbe0d156a3206c08dbc189e8MD51TEXTMINETTO, LUCIANE.pdf.txtMINETTO, LUCIANE.pdf.txtExtracted texttext/plain132788http://repositorio.ufsm.br/bitstream/1/10454/2/MINETTO%2c%20LUCIANE.pdf.txtf1d2aa63aaa7806c1a2612d1a5b2c785MD52THUMBNAILMINETTO, LUCIANE.pdf.jpgMINETTO, LUCIANE.pdf.jpgIM Thumbnailimage/jpeg6189http://repositorio.ufsm.br/bitstream/1/10454/3/MINETTO%2c%20LUCIANE.pdf.jpg6fd2c19f3bc3cb5497ac65fc352ddc39MD531/104542017-07-25 12:05:01.899oai:repositorio.ufsm.br:1/10454Repositório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestopendoar:39132017-07-25T15:05:01Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Reatores de discos rotativos e tubular helicoidal na degradação fotocatalítica de diclofenaco e carga orgânica de efluente hospitalar |
dc.title.alternative.eng.fl_str_mv |
Rotative discs and tubular helicoidal reactors in the photocatalytic degradation of diclofenac and organic load of hospital effluent |
title |
Reatores de discos rotativos e tubular helicoidal na degradação fotocatalítica de diclofenaco e carga orgânica de efluente hospitalar |
spellingShingle |
Reatores de discos rotativos e tubular helicoidal na degradação fotocatalítica de diclofenaco e carga orgânica de efluente hospitalar Minetto, Luciane Química Química analítica Efluentes hospitalares Fotorreatores CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Reatores de discos rotativos e tubular helicoidal na degradação fotocatalítica de diclofenaco e carga orgânica de efluente hospitalar |
title_full |
Reatores de discos rotativos e tubular helicoidal na degradação fotocatalítica de diclofenaco e carga orgânica de efluente hospitalar |
title_fullStr |
Reatores de discos rotativos e tubular helicoidal na degradação fotocatalítica de diclofenaco e carga orgânica de efluente hospitalar |
title_full_unstemmed |
Reatores de discos rotativos e tubular helicoidal na degradação fotocatalítica de diclofenaco e carga orgânica de efluente hospitalar |
title_sort |
Reatores de discos rotativos e tubular helicoidal na degradação fotocatalítica de diclofenaco e carga orgânica de efluente hospitalar |
author |
Minetto, Luciane |
author_facet |
Minetto, Luciane |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Martins, Ayrton Figueiredo |
dc.contributor.advisor1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787438A0 |
dc.contributor.referee1.fl_str_mv |
Machado, ênio Leandro |
dc.contributor.referee1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4784684U8 |
dc.contributor.referee2.fl_str_mv |
Vasconcelos, Tibiriçá Gonçalves |
dc.contributor.referee2Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4705790P8 |
dc.contributor.authorLattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4254225E8 |
dc.contributor.author.fl_str_mv |
Minetto, Luciane |
contributor_str_mv |
Martins, Ayrton Figueiredo Machado, ênio Leandro Vasconcelos, Tibiriçá Gonçalves |
dc.subject.por.fl_str_mv |
Química Química analítica Efluentes hospitalares Fotorreatores |
topic |
Química Química analítica Efluentes hospitalares Fotorreatores CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
In this study, the advanced oxidation process heterogeneous photocatalysis were used for the degradation of diclofenac and decrease of the organic load in the effluent from the emergency sector (PA) of the University Hospital of Santa Maria (HUSM). Two different photoreactors were investigated: the rotative discs reactor, which employed TiO2 immobilized on ceramic discs (1800 mL), and the tubular helicoidal reactor (1000 mL), employing TiO2 in suspension. Both used as radiation source a mercury vapor lamp of medium pressure (125 W and 401 W m-2) that propitiated flow of photons of 2.22 x 10-6 ± 1.30 x10-7 mol s-1 and 1.77 x 10-6 ± 1.45 x 10-7 mol s-1 for the rotative discs and tubular helicoidal reactors, respectively. Potassium ferrioxalate was used as actinometer for these measurements. The experimental conditions were optimized by applying Response Surface Methodology. Reduction of chemical oxygen demand (COD) after 60 min was used for this evaluation. The temperature of the reactors was kept constant in 30 °C, while pH and discs rotation velocity; and pH, mass of TiO2 in suspension and recirculation rate were the variables for rotative discs and tubular helicoidal reactors, respectively. The better conditions found were: pH 5 and 9 rpm for rotative discs reactor (COD reduction of 30%) and pH 3, 600 mg L-1 TiO2 and recirculation rate of 15 L h-1 (COD reduction of 45%) for the tubular helicoidal reactor. The photonic efficiency of the rotative disc reactor was 2.69 ± 0.23%, lower than the 10.54 ± 0.37% reached by the tubular helicoidal. The efficiency of degradation of diclofenac in hospital effluent was assessed through high performance liquid chromatography with diode array detector (HPLC-DAD, lmáx = 279 nm), a mobile phase MeOH:Aqueous Na3PO4 0.01 mol L-1 (H3PO4 , pH 6) 70:30 (v/v). The diclofenac added to the hospital effluent (0.1 mg L-1) was 100% e 97% degraded by using using the rotative disc and tubular helicoidal reactors, respectively. Diclofenac environmental exposure in the hospital effluent was also carried out by mean of HPLC-DAD. Samples collected during 7 days were analyzed. Diclofenac concentration ranged from 0.8 to 3.6 mg L-1 (average: 1.7 mg L-1). The acute toxicity (LC50) of the hospital effluent and diclofenac solutions was evaluated by using bioassay Artemia salina. Inhibition of toxicity caused by the treatment of hospital wastewater using the rotative disc and tubular helicoidal reactors was 58% and 55%, respectively. Concerning diclofenac aqueous solutions, no mortality of Artemia salina was observed, which shows that this compound presents no acute toxicity for this bioindicator. |
publishDate |
2009 |
dc.date.issued.fl_str_mv |
2009-07-28 |
dc.date.accessioned.fl_str_mv |
2017-05-18 |
dc.date.available.fl_str_mv |
2017-05-18 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
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masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
MINETTO, Luciane. Rotative discs and tubular helicoidal reactors in the photocatalytic degradation of diclofenac and organic load of hospital effluent. 2009. 86 f. Dissertação (Mestrado em Química) - Universidade Federal de Santa Maria, Santa Maria, 2009. |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/10454 |
identifier_str_mv |
MINETTO, Luciane. Rotative discs and tubular helicoidal reactors in the photocatalytic degradation of diclofenac and organic load of hospital effluent. 2009. 86 f. Dissertação (Mestrado em Química) - Universidade Federal de Santa Maria, Santa Maria, 2009. |
url |
http://repositorio.ufsm.br/handle/1/10454 |
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Universidade Federal de Santa Maria |
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Programa de Pós-Graduação em Química |
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UFSM |
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BR |
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Química |
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Universidade Federal de Santa Maria |
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