AI Article Synopsis
- The study investigated the biodegradation of benzene by Flavobacterium sourced from Daqing oil fields in a controlled lab setting.
- The microorganisms showed tolerance to benzene concentrations between 8.8 mg/L and 17.6 mg/L, with any concentration above 17.6 mg/L resulting in inhibition.
- Optimal biodegradation occurred at a pH of 6.5 - 7.0 and benzene concentrations of 7.04 - 13.2 mg/L, with observed trends in toxicity and degradation corresponding to changes in the distribution ratio of benzene between the membrane and water.
Article Abstract
The experiments were made in laboratory to analyze the characteristics and principle of benzene's biodegradation using the microorganism (G-, Flavobacterium) taken from Daqing oil fields. Results show that the maximal concentration of benzene, which microorganisms could endure is between 8.8 mg x L(-1) and 17.6 mg x L(-1); microorganisms were inhibited as benzene's concentration was beyond 17.6 mg x L(-1). Trends of benzene's concentration in and out of microorganism's cell are almost same; the biodegradation could be achieved efficiently as the pH range of 6.5 - 7.0 and benzene initial concentration range of 7.04 - 13.2 mg x L(-1). Change of - lgP (P is the distributive ratio of benzene in membrane and water) could be illustrated the trends of toxicity and degradation of benzene in and out of microorganism's cell; the biodegradation rate varied simultaneously with the change of P as initial concentration of benzene was beyond 8.8 mg x L(-1).
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