Microfauna as indicator of copper, zinc, and cycloheximide in activated sludge processes
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/6652 |
Resumo: | Microfauna, comprising protists and little metazoan, has proved to be a useful tool for assessing the occurrence of pollution in wastewater treatment systems, namely on activated-sludge plants. In the present work, the response of the microfauna communities of activated sludge to three toxicants—copper, zinc, and cycloheximide—was studied by means of a series of assays using a bench-scale plant. Along with the community descriptive parameters such as density, taxonomic richness, and the use of biological indexes—the Shannon-Wiener Index and the Sludge Biotic Index—several operating parameters were determined in order to allow for the comparison and possible correlations between the biological and the physical–chemical parameters. The results emphasize the ability of activated sludge communities, both bacteria and microfauna, to survive and to react to toxicants. High concentrations of copper and zinc (20 and 50 mg/L) prevented the satisfactory plant efficiency and the healthy state of the microfauna, including its survival. Cycloheximide did not have important and lasting effects below 5 mg/L. Among physical–chemical parameters, removal of soluble chemical oxygen demand seems to be the only one that presents patterns revealing a cause–effect relation along toxicological assays. Biological parameters were much more sensitive and coherent. The Sludge Biotic Index was, by far, the best tool in detecting intoxicant effects in the microfauna communities. Considering all parameters studied, copper was more toxic than zinc. Cycloheximide, in the range of concentration tested, was less toxic than these metals. The work highlights the role of microfauna as an indicator of toxicants entrance, besides the well-documented indicator value of plant operation conditions and efficiency. |
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Microfauna as indicator of copper, zinc, and cycloheximide in activated sludge processesMicrofaunaActivated-sludge performanceToxicantsProtistsSludge Biotic IndexScience & TechnologyMicrofauna, comprising protists and little metazoan, has proved to be a useful tool for assessing the occurrence of pollution in wastewater treatment systems, namely on activated-sludge plants. In the present work, the response of the microfauna communities of activated sludge to three toxicants—copper, zinc, and cycloheximide—was studied by means of a series of assays using a bench-scale plant. Along with the community descriptive parameters such as density, taxonomic richness, and the use of biological indexes—the Shannon-Wiener Index and the Sludge Biotic Index—several operating parameters were determined in order to allow for the comparison and possible correlations between the biological and the physical–chemical parameters. The results emphasize the ability of activated sludge communities, both bacteria and microfauna, to survive and to react to toxicants. High concentrations of copper and zinc (20 and 50 mg/L) prevented the satisfactory plant efficiency and the healthy state of the microfauna, including its survival. Cycloheximide did not have important and lasting effects below 5 mg/L. Among physical–chemical parameters, removal of soluble chemical oxygen demand seems to be the only one that presents patterns revealing a cause–effect relation along toxicological assays. Biological parameters were much more sensitive and coherent. The Sludge Biotic Index was, by far, the best tool in detecting intoxicant effects in the microfauna communities. Considering all parameters studied, copper was more toxic than zinc. Cycloheximide, in the range of concentration tested, was less toxic than these metals. The work highlights the role of microfauna as an indicator of toxicants entrance, besides the well-documented indicator value of plant operation conditions and efficiency.Fundação para a Ciência e a Tecnologia (FCT)Mary Ann Liebert Inc.Universidade do MinhoNicolau, AnaMota, M.Lima, Nelson2007-052007-05-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/6652eng“Environmental Engineering Science”. ISSN 1092-8758. 24:2 (May 2007) 434-445.1092-875810.1089/ees.2006.06-0005info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T11:55:11Zoai:repositorium.sdum.uminho.pt:1822/6652Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:44:42.204091Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Microfauna as indicator of copper, zinc, and cycloheximide in activated sludge processes |
title |
Microfauna as indicator of copper, zinc, and cycloheximide in activated sludge processes |
spellingShingle |
Microfauna as indicator of copper, zinc, and cycloheximide in activated sludge processes Nicolau, Ana Microfauna Activated-sludge performance Toxicants Protists Sludge Biotic Index Science & Technology |
title_short |
Microfauna as indicator of copper, zinc, and cycloheximide in activated sludge processes |
title_full |
Microfauna as indicator of copper, zinc, and cycloheximide in activated sludge processes |
title_fullStr |
Microfauna as indicator of copper, zinc, and cycloheximide in activated sludge processes |
title_full_unstemmed |
Microfauna as indicator of copper, zinc, and cycloheximide in activated sludge processes |
title_sort |
Microfauna as indicator of copper, zinc, and cycloheximide in activated sludge processes |
author |
Nicolau, Ana |
author_facet |
Nicolau, Ana Mota, M. Lima, Nelson |
author_role |
author |
author2 |
Mota, M. Lima, Nelson |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Nicolau, Ana Mota, M. Lima, Nelson |
dc.subject.por.fl_str_mv |
Microfauna Activated-sludge performance Toxicants Protists Sludge Biotic Index Science & Technology |
topic |
Microfauna Activated-sludge performance Toxicants Protists Sludge Biotic Index Science & Technology |
description |
Microfauna, comprising protists and little metazoan, has proved to be a useful tool for assessing the occurrence of pollution in wastewater treatment systems, namely on activated-sludge plants. In the present work, the response of the microfauna communities of activated sludge to three toxicants—copper, zinc, and cycloheximide—was studied by means of a series of assays using a bench-scale plant. Along with the community descriptive parameters such as density, taxonomic richness, and the use of biological indexes—the Shannon-Wiener Index and the Sludge Biotic Index—several operating parameters were determined in order to allow for the comparison and possible correlations between the biological and the physical–chemical parameters. The results emphasize the ability of activated sludge communities, both bacteria and microfauna, to survive and to react to toxicants. High concentrations of copper and zinc (20 and 50 mg/L) prevented the satisfactory plant efficiency and the healthy state of the microfauna, including its survival. Cycloheximide did not have important and lasting effects below 5 mg/L. Among physical–chemical parameters, removal of soluble chemical oxygen demand seems to be the only one that presents patterns revealing a cause–effect relation along toxicological assays. Biological parameters were much more sensitive and coherent. The Sludge Biotic Index was, by far, the best tool in detecting intoxicant effects in the microfauna communities. Considering all parameters studied, copper was more toxic than zinc. Cycloheximide, in the range of concentration tested, was less toxic than these metals. The work highlights the role of microfauna as an indicator of toxicants entrance, besides the well-documented indicator value of plant operation conditions and efficiency. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-05 2007-05-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/6652 |
url |
http://hdl.handle.net/1822/6652 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
“Environmental Engineering Science”. ISSN 1092-8758. 24:2 (May 2007) 434-445. 1092-8758 10.1089/ees.2006.06-0005 |
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 |
Mary Ann Liebert Inc. |
publisher.none.fl_str_mv |
Mary Ann Liebert Inc. |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799132197409521664 |