Silver removal in radiographic wastewaters

Detalhes bibliográficos
Autor(a) principal: Bortoletto, Edmilson Cesar
Data de Publicação: 2007
Outros Autores: Igarashi-Mafra, Luciana, Sorbo, Amanda Cristina Alfredo Contrucci, Galliani, Naiara Aguiar, Barros, Maria Angélica Simões Dornellas de, Tavares, Celia Regina Granhen
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/83
Resumo: Fixing bath solution as well as radiographic wastewaters contain silver in deleterious concentration to the aquatic ecosystems. Unfortunately such effluents do not receive adequate treatment in order to remove such ion. Therefore the present work aimed to investigate silver removal from fixing baths and radiographic wastewaters from the odontological clinic of the University Hospital of Maringá. Treatments here investigated included precipitation of silver from fixing bath and adsorption in zeolites and activated carbon. The highest silver removal for the first treatment (around 84%) was obtained with 0.17 mol L-1 of H2O2. Concerning the adsorption process, it was concluded that zeolites A, X and mordenite were inefficient to retain the silver complex. Nevertheless activated carbon from babassu coconut was able to remove up to 0.42 mg of silver g-1 of activated carbon.
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spelling Silver removal in radiographic wastewatersRemoção da prata em efluentes radiográficos - DOI: 10.4025/actascitechnol.v29i1.83efluenteadsorçãoprecipitaçãofilmes radiográficosprataFixing bath solution as well as radiographic wastewaters contain silver in deleterious concentration to the aquatic ecosystems. Unfortunately such effluents do not receive adequate treatment in order to remove such ion. Therefore the present work aimed to investigate silver removal from fixing baths and radiographic wastewaters from the odontological clinic of the University Hospital of Maringá. Treatments here investigated included precipitation of silver from fixing bath and adsorption in zeolites and activated carbon. The highest silver removal for the first treatment (around 84%) was obtained with 0.17 mol L-1 of H2O2. Concerning the adsorption process, it was concluded that zeolites A, X and mordenite were inefficient to retain the silver complex. Nevertheless activated carbon from babassu coconut was able to remove up to 0.42 mg of silver g-1 of activated carbon.O efluente proveniente da etapa de fixação e a água de enxágüe gerada no processamento de filmes radiográficos contêm prata na forma de complexo negativo de tiossulfato de prata, o que torna este efluente extremamente tóxico a organismos aquáticos. Neste trabalho foi realizado o estudo da remoção da prata presente nestes efluentes. Para a remoção da prata presente no fixador foi realizado o estudo da precipitação utilizando diferentes agentes precipitantes. A maior porcentagem de remoção de prata (84%) foi obtida utilizando-se H2O2 a 0,17 mol L-1. Além disso, foi realizado o estudo da remoção da prata presente na água residual pelo processo de adsorção com carvão ativado e zeólitas. A zeólita não apresentou afinidade com o complexo de prata. Os melhores resultados de remoção de prata foram obtidos com o uso de carvão ativado granular de coco de babaçu, obtendo-se uma remoção de 0,42 mg de prata g-1 de carvão ativado.Universidade Estadual De Maringá2007-12-18info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/8310.4025/actascitechnol.v29i1.83Acta Scientiarum. Technology; Vol 29 No 1 (2007); 37-41Acta Scientiarum. Technology; v. 29 n. 1 (2007); 37-411806-25631807-8664reponame:Acta scientiarum. Technology (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/83/50Bortoletto, Edmilson CesarIgarashi-Mafra, LucianaSorbo, Amanda Cristina Alfredo ContrucciGalliani, Naiara AguiarBarros, Maria Angélica Simões Dornellas deTavares, Celia Regina Granheninfo:eu-repo/semantics/openAccess2024-05-17T13:02:25Zoai:periodicos.uem.br/ojs:article/83Revistahttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/indexPUBhttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/oai||actatech@uem.br1807-86641806-2563opendoar:2024-05-17T13:02:25Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Silver removal in radiographic wastewaters
Remoção da prata em efluentes radiográficos - DOI: 10.4025/actascitechnol.v29i1.83
title Silver removal in radiographic wastewaters
spellingShingle Silver removal in radiographic wastewaters
Bortoletto, Edmilson Cesar
efluente
adsorção
precipitação
filmes radiográficos
prata
title_short Silver removal in radiographic wastewaters
title_full Silver removal in radiographic wastewaters
title_fullStr Silver removal in radiographic wastewaters
title_full_unstemmed Silver removal in radiographic wastewaters
title_sort Silver removal in radiographic wastewaters
author Bortoletto, Edmilson Cesar
author_facet Bortoletto, Edmilson Cesar
Igarashi-Mafra, Luciana
Sorbo, Amanda Cristina Alfredo Contrucci
Galliani, Naiara Aguiar
Barros, Maria Angélica Simões Dornellas de
Tavares, Celia Regina Granhen
author_role author
author2 Igarashi-Mafra, Luciana
Sorbo, Amanda Cristina Alfredo Contrucci
Galliani, Naiara Aguiar
Barros, Maria Angélica Simões Dornellas de
Tavares, Celia Regina Granhen
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Bortoletto, Edmilson Cesar
Igarashi-Mafra, Luciana
Sorbo, Amanda Cristina Alfredo Contrucci
Galliani, Naiara Aguiar
Barros, Maria Angélica Simões Dornellas de
Tavares, Celia Regina Granhen
dc.subject.por.fl_str_mv efluente
adsorção
precipitação
filmes radiográficos
prata
topic efluente
adsorção
precipitação
filmes radiográficos
prata
description Fixing bath solution as well as radiographic wastewaters contain silver in deleterious concentration to the aquatic ecosystems. Unfortunately such effluents do not receive adequate treatment in order to remove such ion. Therefore the present work aimed to investigate silver removal from fixing baths and radiographic wastewaters from the odontological clinic of the University Hospital of Maringá. Treatments here investigated included precipitation of silver from fixing bath and adsorption in zeolites and activated carbon. The highest silver removal for the first treatment (around 84%) was obtained with 0.17 mol L-1 of H2O2. Concerning the adsorption process, it was concluded that zeolites A, X and mordenite were inefficient to retain the silver complex. Nevertheless activated carbon from babassu coconut was able to remove up to 0.42 mg of silver g-1 of activated carbon.
publishDate 2007
dc.date.none.fl_str_mv 2007-12-18
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/83
10.4025/actascitechnol.v29i1.83
url http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/83
identifier_str_mv 10.4025/actascitechnol.v29i1.83
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/83/50
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 29 No 1 (2007); 37-41
Acta Scientiarum. Technology; v. 29 n. 1 (2007); 37-41
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_ 1799315331411345408

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