Your browser doesn't support javascript.
loading
Utilization of Triton X-100 and polyethylene glycols during surfactant-mediated biodegradation of diesel fuel.
Wyrwas, Bogdan; Chrzanowski, Lukasz; Lawniczak, Lukasz; Szulc, Alicja; Cyplik, Pawel; Bialas, Wojciech; Szymanski, Andrzej; Holderna-Odachowska, Aleksandra.
Afiliação
  • Wyrwas B; Institute of Chemistry, Poznan University of Technology, Poznan, Poland.
J Hazard Mater ; 197: 97-103, 2011 Dec 15.
Article em En | MEDLINE | ID: mdl-21996621
ABSTRACT
The hypothesis regarding preferential biodegradation of surfactants applied for enhancement of microbial hydrocarbons degradation was studied. At first the microbial degradation of sole Triton X-100 by soil isolated hydrocarbon degrading bacterial consortium was confirmed under both full and limited aeration with nitrate as an electron acceptor. Triton X-100 (600 mg/l) was utilized twice as fast for aerobic conditions (t(1/2)=10.3h), compared to anaerobic conditions (t(1/2)=21.8h). HPLC/ESI-MS analysis revealed the preferential biodegradation trends in both components classes of commercial Triton X-100 (alkylphenol ethoxylates) as well as polyethylene glycols. The obtained results suggest that the observed changes in the degree of ethoxylation for polyethylene glycol homologues occurred as a consequence of the 'central fission' mechanism during Triton X-100 biodegradation. Subsequent experiments with Triton X-100 at approx. CMC concentration (150 mg/l) and diesel oil supported our initial hypothesis that the surfactant would become the preferred carbon source even for hydrocarbon degrading bacteria. Regardless of aeration regimes Triton X-100 was utilized within 48-72 h. Efficiency of diesel oil degradation was decreased in the presence of surfactant for aerobic conditions by approx. 25% reaching 60 instead of 80% noted for experiments without surfactant. No surfactant influence was observed for anaerobic conditions.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Polietilenoglicóis / Tensoativos / Biodegradação Ambiental / Gasolina / Octoxinol Idioma: En Ano de publicação: 2011 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Polietilenoglicóis / Tensoativos / Biodegradação Ambiental / Gasolina / Octoxinol Idioma: En Ano de publicação: 2011 Tipo de documento: Article