| Autor: |
Londry, K. L., Suflita, J. M. |
| Předmět: |
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| Zdroj: |
Environmental Toxicology & Chemistry. Jul1998, Vol. 17 Issue 7, p1199. 0p. |
| Abstrakt: |
Four classes of organosulfur compounds were tested for their effectson anaerobic microbial activity as indicated by rates of lactate degradation, nitrate or sulfate reduction, and methanogenesis. Each class consisted of five to eight chemically related compounds that were added concurrently to anaerobic cultures established with an oily sludge inoculum. Effects on anaerobic activities were evaluated at different amounts of the chemicals and were concentration dependent in all cases. Thiophenes and thiols inhibited microbial activity under methanogenic conditions at >/=5 mmol/L~ the former compounds had less effect under nitrate-reducing conditions, and the latter had less effect under sulfate-reducing conditions. Thiophenic acids did not influencemost microbial processes at the lower concentrations tested (/= 5 mmol/L and had a greater effect on electron acceptor reduction than lactate oxidation. We conclude that the inhibitory effect of organosulfur compounds on microbial metabolism could potentially influence the assessment of anaerobic biodegradation activities in either the laboratory or anoxic environments. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
| Externí odkaz: |
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