Sulfate reducing bacteria recognized as one of interesting groups of anaerobic dehalorespirating bacteria. They play an important role in degradation of persistent organic pullutants (POP), including compounds of herbicides. Sixty-one sulfate reducing bacterial strains from heavy herbicide/dioxin contaminated soils and sediments in Da Nang former military airbase were isolated. Among them, 9 strains grew in Posgate B medium containing 0.7 g/l sodium lactate and extract from contaminated soil with the main components such as dioxin, 2,4,5-T, 2,4,5-TCP, 2,4-D and 2,4-DCP. No strain grew on soil extract as a sole carbon source. Six strains, classified by morphology and gene analysis of 16S rRNA. all belong to the Desulfovibrio genus. By using GCMS scanning method, chemical composition of the enrichment culture of Desulfovibrio sp. BON10T in the medium containing soil extract showed that the examinated strain degraded some of components existing in soil extract including 2,4-DCP (2,4-dichorophenol) and 2,4,5-TCP (2,4,5-trichlorophenol).