Degradation of Benzo(a)pyrene in Ethanol Washing Solution of Contaminated Soil by Hybrid Treatment

摘要

As a means to remediate benzo (a) pyrene [B(a)P] in ethanol used in washing B(a)P-contaminated soil, we investigated hybrid treatment (i.e., Fenton oxidation-microbial degradation) of concentrated B(a)P in ethanol (i.e., 62.3-108.5 mg L~(-1)), where more than 99.8% of B(a)OP was removed under a pseudo-first order reaction by Fenton oxidation. GC-MS and HPLC-UV anaysis identified B(a)P -1,6,-, -3,6-, AND -6,12-dione as Fenton oxidation products, all of which are known to have lower toxicity than B(a)P. After Fenton oxidation, microbial treatment demonstrated than B (a) P-1,6-, -3,6-, and -6,12-dione are more easily degraded than B(a)P. These results indicate that the proposed hybrid treatment can be effectively applied to remediate B (a) P in ethanol washing solution.