Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon
- Autores
- Ferro Orozco, Ana Micaela; Contreras, Edgardo Martín; Bértola, Nora Cristina; Zaritzky, Noemí Elisabet
- Año de publicación
- 2009
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The addition of powdered activated carbon (PAC) has been proposed as a suitable technique to protect activated sludge against toxic wastewaters. However, the literature data describing the combined effect of PAC addition on Cr(VI) removal using activated sludge are scarce. The objectives of this study were to investigate the effect of the initial Cr(VI) concentration, PAC and an electron donor addition on Cr(VI) removal using aerobic activated sludge batch reactors. The following Cr(VI) removal systems were tested: activated sludge alone; activated sludge with an external electron donor (5 g/ℓ of lactose); activated sludge with PAC addition (4 g/ℓ); activated sludge with both PAC and lactose; and PAC alone. The results reported here showed that activated sludges are capable of removing Cr(VI) via its reduction to Cr(III) only if a suitable electron donor (such as lactose) is available. For initial Cr(VI) concentration lower than 10 mg/ℓ, biomass alone can remove 100% of the Cr(VI). However, for higher initial Cr(VI) concentrations, removal efficiencies (RE) of the system with PAC were higher than RE corresponding to the system without PAC. In addition, as the initial Cr(VI) concentration increased, the rate of Cr(VI) removal and RE values decreased reflecting loss of metabolic activity of the activated sludge due to the toxicity of Cr(VI); however, this inhibition was less in systems with PAC. Whereas the removal of Cr(VI) using powdered activated carbon (PAC) alone is negligible, the addition of PAC can improve the biological reduction of Cr(VI) due to the stimulating or protective effect against the Cr(VI) toxicity. This protective effect was also observed in respiratory activity of the biomass.
Centro de Investigación y Desarrollo en Criotecnología de Alimentos - Materia
-
Química
Activated sludge
Powdered activated carbon
Hexavalent chromium
Trivalent chromium - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/101032
Ver los metadatos del registro completo
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Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbonFerro Orozco, Ana MicaelaContreras, Edgardo MartínBértola, Nora CristinaZaritzky, Noemí ElisabetQuímicaActivated sludgePowdered activated carbonHexavalent chromiumTrivalent chromiumThe addition of powdered activated carbon (PAC) has been proposed as a suitable technique to protect activated sludge against toxic wastewaters. However, the literature data describing the combined effect of PAC addition on Cr(VI) removal using activated sludge are scarce. The objectives of this study were to investigate the effect of the initial Cr(VI) concentration, PAC and an electron donor addition on Cr(VI) removal using aerobic activated sludge batch reactors. The following Cr(VI) removal systems were tested: activated sludge alone; activated sludge with an external electron donor (5 g/ℓ of lactose); activated sludge with PAC addition (4 g/ℓ); activated sludge with both PAC and lactose; and PAC alone. The results reported here showed that activated sludges are capable of removing Cr(VI) via its reduction to Cr(III) only if a suitable electron donor (such as lactose) is available. For initial Cr(VI) concentration lower than 10 mg/ℓ, biomass alone can remove 100% of the Cr(VI). However, for higher initial Cr(VI) concentrations, removal efficiencies (RE) of the system with PAC were higher than RE corresponding to the system without PAC. In addition, as the initial Cr(VI) concentration increased, the rate of Cr(VI) removal and RE values decreased reflecting loss of metabolic activity of the activated sludge due to the toxicity of Cr(VI); however, this inhibition was less in systems with PAC. Whereas the removal of Cr(VI) using powdered activated carbon (PAC) alone is negligible, the addition of PAC can improve the biological reduction of Cr(VI) due to the stimulating or protective effect against the Cr(VI) toxicity. This protective effect was also observed in respiratory activity of the biomass.Centro de Investigación y Desarrollo en Criotecnología de Alimentos2009-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf239-244http://sedici.unlp.edu.ar/handle/10915/101032enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/76071info:eu-repo/semantics/altIdentifier/url/https://www.ajol.info/index.php/wsa/article/view/49077info:eu-repo/semantics/altIdentifier/issn/1816-7950info:eu-repo/semantics/altIdentifier/doi/10.4314/wsa.v33i2.49077info:eu-repo/semantics/altIdentifier/hdl/11336/76071info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:21:00Zoai:sedici.unlp.edu.ar:10915/101032Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:21:00.707SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon |
title |
Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon |
spellingShingle |
Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon Ferro Orozco, Ana Micaela Química Activated sludge Powdered activated carbon Hexavalent chromium Trivalent chromium |
title_short |
Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon |
title_full |
Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon |
title_fullStr |
Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon |
title_full_unstemmed |
Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon |
title_sort |
Hexavalent chromium removal using aerobic activated sludge batch systems added with powdered activated carbon |
dc.creator.none.fl_str_mv |
Ferro Orozco, Ana Micaela Contreras, Edgardo Martín Bértola, Nora Cristina Zaritzky, Noemí Elisabet |
author |
Ferro Orozco, Ana Micaela |
author_facet |
Ferro Orozco, Ana Micaela Contreras, Edgardo Martín Bértola, Nora Cristina Zaritzky, Noemí Elisabet |
author_role |
author |
author2 |
Contreras, Edgardo Martín Bértola, Nora Cristina Zaritzky, Noemí Elisabet |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Química Activated sludge Powdered activated carbon Hexavalent chromium Trivalent chromium |
topic |
Química Activated sludge Powdered activated carbon Hexavalent chromium Trivalent chromium |
dc.description.none.fl_txt_mv |
The addition of powdered activated carbon (PAC) has been proposed as a suitable technique to protect activated sludge against toxic wastewaters. However, the literature data describing the combined effect of PAC addition on Cr(VI) removal using activated sludge are scarce. The objectives of this study were to investigate the effect of the initial Cr(VI) concentration, PAC and an electron donor addition on Cr(VI) removal using aerobic activated sludge batch reactors. The following Cr(VI) removal systems were tested: activated sludge alone; activated sludge with an external electron donor (5 g/ℓ of lactose); activated sludge with PAC addition (4 g/ℓ); activated sludge with both PAC and lactose; and PAC alone. The results reported here showed that activated sludges are capable of removing Cr(VI) via its reduction to Cr(III) only if a suitable electron donor (such as lactose) is available. For initial Cr(VI) concentration lower than 10 mg/ℓ, biomass alone can remove 100% of the Cr(VI). However, for higher initial Cr(VI) concentrations, removal efficiencies (RE) of the system with PAC were higher than RE corresponding to the system without PAC. In addition, as the initial Cr(VI) concentration increased, the rate of Cr(VI) removal and RE values decreased reflecting loss of metabolic activity of the activated sludge due to the toxicity of Cr(VI); however, this inhibition was less in systems with PAC. Whereas the removal of Cr(VI) using powdered activated carbon (PAC) alone is negligible, the addition of PAC can improve the biological reduction of Cr(VI) due to the stimulating or protective effect against the Cr(VI) toxicity. This protective effect was also observed in respiratory activity of the biomass. Centro de Investigación y Desarrollo en Criotecnología de Alimentos |
description |
The addition of powdered activated carbon (PAC) has been proposed as a suitable technique to protect activated sludge against toxic wastewaters. However, the literature data describing the combined effect of PAC addition on Cr(VI) removal using activated sludge are scarce. The objectives of this study were to investigate the effect of the initial Cr(VI) concentration, PAC and an electron donor addition on Cr(VI) removal using aerobic activated sludge batch reactors. The following Cr(VI) removal systems were tested: activated sludge alone; activated sludge with an external electron donor (5 g/ℓ of lactose); activated sludge with PAC addition (4 g/ℓ); activated sludge with both PAC and lactose; and PAC alone. The results reported here showed that activated sludges are capable of removing Cr(VI) via its reduction to Cr(III) only if a suitable electron donor (such as lactose) is available. For initial Cr(VI) concentration lower than 10 mg/ℓ, biomass alone can remove 100% of the Cr(VI). However, for higher initial Cr(VI) concentrations, removal efficiencies (RE) of the system with PAC were higher than RE corresponding to the system without PAC. In addition, as the initial Cr(VI) concentration increased, the rate of Cr(VI) removal and RE values decreased reflecting loss of metabolic activity of the activated sludge due to the toxicity of Cr(VI); however, this inhibition was less in systems with PAC. Whereas the removal of Cr(VI) using powdered activated carbon (PAC) alone is negligible, the addition of PAC can improve the biological reduction of Cr(VI) due to the stimulating or protective effect against the Cr(VI) toxicity. This protective effect was also observed in respiratory activity of the biomass. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-12 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/101032 |
url |
http://sedici.unlp.edu.ar/handle/10915/101032 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/76071 info:eu-repo/semantics/altIdentifier/url/https://www.ajol.info/index.php/wsa/article/view/49077 info:eu-repo/semantics/altIdentifier/issn/1816-7950 info:eu-repo/semantics/altIdentifier/doi/10.4314/wsa.v33i2.49077 info:eu-repo/semantics/altIdentifier/hdl/11336/76071 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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