Jornal de Biorremediação e Biodegradação

Abstrato

Biodegradation of Phenol by Native Bacteria Isolated From Dioxin Contaminated Soils

Han Ba Bui, Lan Thi Nguyen and Long Duc Dang

In this investigation, aerobic bacteria in soil contaminated with dioxin (taken from Da Nang airport’s area in Vietnam) were isolated and selected for their ability to degrade phenol using enrichment technique containing phenol as sole source of carbon and energy (100 mg/L phenol in a mineral salt medium). Four strains (designated D1.1, D1.3, D1.4, and D1.6) were obtained and characterized. The results showed that these bacteria were highly effective for the removal of phenol. After 120 hours of culture, strain D1.4 degraded 54.84% and 44.19% phenol from the initial concentrations of 100 mg/L and 1000 mg/L, respectively; strain D1.6 degraded 66.45% of phenol from the initial concentration of 1500 mg/L. The combination of those bacteria in the same medium had a positive effect on the phenol degradation activity. The outcome of the study can contribute new useful resources for treatments of wastewater and soils contaminated with phenolic wastes.