Effect of low concentrations of synthetic surfactants on polycyclic aromatic hydrocarbons (PAH) biodegradation

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Ana Rodrigues (Autor) Outra; Regina Nogueira (Autor) Outra; Luís F. Melo (Autor) FEUP; António G. Brito (Autor) Outra

Revista

A Revista está pendente de validação pelos Serviços Administrativos.

Título: INTERNATIONAL BIODETERIORATION & BIODEGRADATION

Vol. 83

Páginas: 48-55

ISSN: 0964-8305

Indexação

ISI Web of Knowledge - 22 Citações

Scopus - 27 Citações

Projetos Associados

UI0511 - PROJECTO ESTRATÉGICO - UI 511 - 2013-2014

Outras Informações

ID Authenticus: P-006-802

DOI: 10.1016/j.ibiod.2013.04.001

Abstract (EN): The present study is focused on the effect of synthetic surfactants, at low concentration, on the kinetics of polycyclic aromatic hydrocarbons (PAH) biodegradation by Pseudomonas putida ATCC 17514 and addresses the specific issue of the effect of the surfactant on bacterial adhesion to PAH, which is believed to be an important mechanism for the uptake of hydrophobic compounds. For that purpose, three surfactants were tested, namely, the nonionic Tween 20, the anionic sodium dodecyl sulphate (SDS) and the cationic surfactant cetyltrymethyl ammonium bromide (CTAB). Data showed that the effect of each surfactant on the ability of strain ATCC 17514 to biodegrade fluoranthene and anthracene and to use them as growth substrate varied considerably. Tween 20, at a concentration of 0.08 mM, increased the biodegradation rate of fluoranthene and doubled the maximum specific biodegradation rate of anthracene. The presence of SDS, at a concentration of 0.35 mM, led to a reduction of 50% on the biodegradation rate of fluoranthene, but doubled the removal rate of the more hydrophobic anthracene (0.3 mg L
1 h
1 ). Finally, CTAB, at a concentration of 0.27 mM, had a negative effect on the biodegradation of both PAH, leading to an abrupt decrease on the biomass growth.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8