Degradability of Polychlorinated Phenols by Bacterial Populations in Soil

概要

論文の詳細を見る
The biodegradabilities of polychlorinated phenols including 5 isomers of trichlorophenols, 3 isomers of tetrachlorophenols and pentachlorophenol, were tested with 170 samples of soild collected from various environments. After the samples were inoculated into a succinate-containing mineral medium and incubated, the cultures were acclimatized to phenol concentrations from 10 to 100 ppm. Twenty six samples (15%) were observed to degrade 2,4,6-trichlorophenol (246TrCP) and a mixed sample of soil degraded 2,3,4,6-tetrachlorophenol, but no degradation was seen with other chlorophenols. All of the mixed cultures acclimatized to and degrading 246TrCP also degraded phenol. For the degradation of 246TrCP, the NO_3^- ion was preferred to the NH_4^+ ion as a nitorogenn source. At concentrations below 500 ppm, 246TrCP was degraded completely within 8 d and the chloride ion was detected in the culture broth at an amount corresponding to that of the chlorinated phenol, although cell growth was inhibited at a 246TrCP concentration of 1,000 ppm. No possible intermediate product of 246TrCP was detected in the cultures.
社団法人日本生物工学会の論文
1989-05-25