Repositorio Institucional
Repositorio Institucional
CONICET Digital
  • Inicio
  • EXPLORAR
    • AUTORES
    • DISCIPLINAS
    • COMUNIDADES
  • Estadísticas
  • Novedades
    • Noticias
    • Boletines
  • Ayuda
    • General
    • Datos de investigación
  • Acerca de
    • CONICET Digital
    • Equipo
    • Red Federal
  • Contacto
JavaScript is disabled for your browser. Some features of this site may not work without it.
  • INFORMACIÓN GENERAL
  • RESUMEN
  • ESTADISTICAS
 
Artículo

Selection and identification of a bacterial community able to degrade and detoxify m-nitrophenol in continuous biofilm reactors

González, Ana JulietaIcon ; Fortunato, María Susana; Papalia, Mariana AndreaIcon ; Radice, Marcela AlejandraIcon ; Gutkind, Gabriel OsvaldoIcon ; Magdaleno, AnahíIcon ; Gallego, Alfredo; Korol, Sonia Edith
Fecha de publicación: 12/2015
Editorial: Academic Press Inc Elsevier Science
Revista: Ecotoxicology and Environmental Safety
ISSN: 0147-6513
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Bioremediación, Diagnóstico Biotecnológico en Gestión Medioambiental

Resumen

Nitroaromatics are widely used for industrial purposes and constitute a group of compounds of environmental concern because of their persistence and toxic properties. Biological processes used for decontamination of nitroaromatic-polluted sources have then attracted worldwide attention. In the present investigation m-nitrophenol (MNP) biodegradation was studied in batch and continuous reactors. A bacterial community able to degrade the compound was first selected from a polluted freshwater stream and the isolates were identified by the analysis of the 16S rRNA gene sequence. The bacterial community was then used in biodegradation assays. Batch experiments were conducted in a 2L aerobic microfermentor at 28°C and with agitation (200rpm). The influence of abiotic factors in the biodegradation process in batch reactors, such as initial concentration of the compound and initial pH of the medium, was also studied. Continuous degradation of MNP was performed in an aerobic up-flow fixed-bed biofilm reactor. The biodegradation process was evaluated by determining MNP and ammonium concentrations and chemical oxygen demand (COD). Detoxification was assessed by Vibrio fischeri and Pseudokirchneriella subcapitata toxicity tests. Under batch conditions the bacterial community was able to degrade 0.72mM of MNP in 32h, with efficiencies higher than 99.9% and 89.0% of MNP and COD removals respectively and with concomitant release of ammonium. When the initial MNP concentration increased to 1.08 and 1.44mM MNP the biodegradation process was accomplished in 40 and 44h, respectively. No biodegradation of the compound was observed at higher concentrations. The community was also able to degrade 0.72mM of the compound at pH 5, 7 and 9. In the continuous process biodegradation efficiency reached 99.5% and 96.8% of MNP and COD removal respectively. The maximum MNP removal rate was 37.9gm-3day-1. Toxicity was not detected after the biodegradation process.
Palabras clave: Abiotic Factors , Biodegradation , Continuous Biofilm Reactors , Detoxification , M-Nitrophenol
Ver el registro completo
 
Archivos asociados
Thumbnail
 
Tamaño: 1.746Mb
Formato: PDF
.
Descargar
Licencia
info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/37940
URL: https://www.sciencedirect.com/science/article/pii/S0147651315300361
DOI: http://dx.doi.org/10.1016/j.ecoenv.2015.07.029
Colecciones
Articulos(OCA HOUSSAY)
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA HOUSSAY
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Citación
González, Ana Julieta; Fortunato, María Susana; Papalia, Mariana Andrea; Radice, Marcela Alejandra; Gutkind, Gabriel Osvaldo; et al.; Selection and identification of a bacterial community able to degrade and detoxify m-nitrophenol in continuous biofilm reactors; Academic Press Inc Elsevier Science; Ecotoxicology and Environmental Safety; 122; 12-2015; 245-251
Compartir
Altmétricas
 

Enviar por e-mail
Separar cada destinatario (hasta 5) con punto y coma.
  • Facebook
  • X Conicet Digital
  • Instagram
  • YouTube
  • Sound Cloud
  • LinkedIn

Los contenidos del CONICET están licenciados bajo Creative Commons Reconocimiento 2.5 Argentina License

https://www.conicet.gov.ar/ - CONICET

Inicio

Explorar

  • Autores
  • Disciplinas
  • Comunidades

Estadísticas

Novedades

  • Noticias
  • Boletines

Ayuda

Acerca de

  • CONICET Digital
  • Equipo
  • Red Federal

Contacto

Godoy Cruz 2290 (C1425FQB) CABA – República Argentina – Tel: +5411 4899-5400 repositorio@conicet.gov.ar
TÉRMINOS Y CONDICIONES