Resumé
We studied the degradation of pentachlorophenol (PCP) under methanogenic and sulfate-reducing conditions with an anaerobic mixed culture derived from sewage sludge. The consortium degraded PCP via 2,3,4,5-tetrachlorophenol, 3,4,5-trichlorophenol, and 3,5-dichlorophenol and eventually accumulated 3-chlorophenol. Dechlorination of PCP and metabolites was inhibited in the presence of sulfate, thiosulfate, and sulfite. A decrease in the rate of PCP transformation was noted when the endogenous dissolved H2 was depleted below 0.11 μM in sulfate-reducing cultures. The effect on dechlorination observed with sulfate could be relieved by addition of molybdate, a competitive inhibitor of sulfate reduction. Addition of H2 reduced the inhibition observed with sulfuroxy anions. The inhibitory effect of sulfuroxy anions may be due to a competition for H2 between sulfate reduction and dechlorination. When cultured under methanogenic conditions, the consortium degraded several chlorinated and brominated phenols.
Originalsprog | Engelsk |
---|---|
Sider (fra-til) | 2453-2458 |
Antal sider | 6 |
Tidsskrift | Applied and Environmental Microbiology |
Vol/bind | 57 |
Udgave nummer | 9 |
DOI | |
Status | Udgivet - 1991 |
Udgivet eksternt | Ja |
Emneord
- chlorinated phenols
- reductive dechlorination
- anaerobic
Programområde
- Programområde 2: Vandressourcer