Utilização de altas concentrações de benzeno, tolueno e xileno (compostos BTX) como fonte de carbono por linhagens bacterianas

Detalhes bibliográficos
Ano de defesa: 2002
Autor(a) principal: Dulcini, Silvana Elizabeth de Méo
Orientador(a): Durrant, Lúcia Regina lattes
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de São Carlos
Câmpus São Carlos
Programa de Pós-Graduação: Programa de Pós-Graduação em Ecologia e Recursos Naturais - PPGERN
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Área do conhecimento CNPq:
Link de acesso: https://repositorio.ufscar.br/handle/20.500.14289/8897
Resumo: BTX compouds [benzene, toluene and xylene isomers (ortho, meta and para)] are light aromatics present in gasoline. They are toxic and relatively soíuble in water. This high solubility in comparison with other petroleum hydrocarbons explains their potential effect in the environment. Experimenta with pre-conditionated cultures, isolated from petroleum contaminated sites, were carried out with the aim of selecting sotventtolerant strains able of growing in high concentrations of BTX. Those strains were evaluated for their ability of p-xylene utilization. After 3 days of incubation, two strains were responsible for high percentages of pxylene removal from culture médium. It was concluded that these results were related to biodegradation, since the strains were able to grow in pxylene as the sole source of carbon and energy. High performance liquid chromatography and gas chromatography with flame ionization detection were used for BTX-determinationsr Biosurfactant production from the cultures was also evaluated, by emulsifying activity and emulsifying index (E24) determinations. Emulsification did not showany relationship with pxylene biodegradation.