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dc.contributor.author
González, Ana Julieta
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dc.contributor.author
Fortunato, María Susana
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dc.contributor.author
Gallego, Alfredo
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dc.contributor.author
Korol, Sonia Edith
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dc.date.available
2020-11-04T20:36:52Z
dc.date.issued
2017-07
dc.identifier.citation
González, Ana Julieta; Fortunato, María Susana; Gallego, Alfredo; Korol, Sonia Edith; Simultaneous Biodegradation and Detoxification of the Herbicides 2,4-Dichlorophenoxyacetic Acid and 4-Chloro-2-Methylphenoxyacetic Acid in a Continuous Biofilm Reactor; Springer; Water, Air and Soil Pollution; 228; 8; 7-2017; 1-7
dc.identifier.issn
0049-6979
dc.identifier.uri
http://hdl.handle.net/11336/117646
dc.description.abstract
The herbicides 2,4-diclorophenoxiacetic and 4-chloro-2-methylphenoxyacetic acids (2,4-D and MCPA) are widely used in agricultural practices worldwide. Not only are these practices responsible of surface waters contamination, but also agrochemical industries through the discharge of their liquid effluents. In this investigation, the ability of a 2,4-D degrading Delftia sp. strain to degrade the related compound MCPA and a mixture of both herbicides was assessed in batch reactors. The strain was also employed to remove and detoxify both herbicides from a synthetic effluent in a continuous reactor. Batch experiments were conducted in a 2-L aerobic microfermentor, at 28 °C. Continuous experiments were carried out in an aerobic downflow fixed-bed reactor. Bacterial growth was evaluated by the plate count method. Degradation of the compounds was evaluated by UV spectrophotometry, gas chromatography (GC), and chemical oxygen demand (COD). Toxicity was assessed before and after the continuous process by using Lactuca sativa seeds as test organisms. Delftia sp. was able to degrade 100 mg L−1 of MCPA in 52 h. When the biodegradation assay was carried out with a mixture of 100 mg L−1 of each herbicide, the process was accomplished in 56 h. In the continuous reactor, the strain showed high efficiency in the simultaneous removal of 100 mg L−1 of each herbicide. Removals of 99.7, 99.5, and 95.0% were achieved for 2,4-D, MCPA, and COD, respectively. Samples from the influent of the continuous reactor showed high toxicity levels for Lactuca sativa seeds, while toxicity was not detected after the continuous process.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
2,4-D HERBICIDE MIXTURES
dc.subject
CONTINUOUS REACTORS
dc.subject
DETOXIFICATION
dc.subject
MCPA
dc.subject.classification
Salud Pública y Medioambiental
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dc.subject.classification
Ciencias de la Salud
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dc.subject.classification
CIENCIAS MÉDICAS Y DE LA SALUD
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dc.title
Simultaneous Biodegradation and Detoxification of the Herbicides 2,4-Dichlorophenoxyacetic Acid and 4-Chloro-2-Methylphenoxyacetic Acid in a Continuous Biofilm Reactor
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-02T17:03:49Z
dc.journal.volume
228
dc.journal.number
8
dc.journal.pagination
1-7
dc.journal.pais
Alemania
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dc.journal.ciudad
Berlín
dc.description.fil
Fil: González, Ana Julieta. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Fortunato, María Susana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica; Argentina
dc.description.fil
Fil: Gallego, Alfredo. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica; Argentina
dc.description.fil
Fil: Korol, Sonia Edith. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Water, Air and Soil Pollution
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s11270-017-3468-4
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s11270-017-3468-4
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