A hybrid fenton oxidation-microbial treatment for soil highly contaminated with benz(a)anthracene |
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Authors: | Lee B D Hosomi M |
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Institution: | Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka, Koganei, Tokyo 184-8588, Japan |
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Abstract: | In order to mitigate the strong microbial resistance of benz(a)anthracene B(a)A] in soil, a hybrid treatment of Fenton oxidation followed microbial culture was carried out. Based on optimal Fenton oxidation, i.e., 1.0 ml of ethanol, 0.2 ml of 0.5 M Fe2+, and 0.3 ml of 30% H2O2 per 1 g of 500 mg B(a)A/kg soil, about 43% of B(a)A-7,12-dione was generated during oxidation of 97% B(a)A. When the comparative biodegradability between B(a)A-contaminated soil and B(a)A-contaminated soil after Fenton oxidation was examined, it was found that 98% of B(a)A-7,12-dione degraded after 63 d in comparison with only 12% of B(a)A over the same period; results demonstrating that Fenton oxidation enhances biodegradability of B(a)A through B(a)A-7,12-dione. |
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Keywords: | Benz(a)anthracene Benz(a)anthracene-7 12-dione Biodegradability Fenton oxidation Microbial resistance Contaminated soil |
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