연속적인 화학적 처리 및 생물학적 처리에 의한 플루오렌 오염토양의 정화
Cleanup of Fluorene-Contaminated Soil by Continuous Chemical and Biological Treatment
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We describe a method for effectively pretreating soil highly that has been contaminated with fluorene (» 120 mg/kg soil), i.e., we apply Fenton oxidation in which ethanol is added to increase fluorene removal. To obtain maximum fluorene removal efficiency, a minimum of 1.0 ml of ethanol, 0.35 ml of H_2O_2, and 0.2 ml of 0.5M Fe^(2+) was needed per 1 g of fluorene-contaminated soil. Under optimal Fenton oxidation conditions, 13% of 9-fluorene was generated during Fenton oxidation of 43% fluorene. The biodegradability of 9-fluorenone was subsequently confirmed to be much more rapid than that of fluorene, i.e., biodegradability of 96% versus 35% over 31 days. These results demonstrate that the proposed treatment method can be effectively applied to remove fluorene prior to disposal at industrial waste sites.
Abstract
We describe a method for effectively pretreating soil highly that has been contaminated with fluorene (» 120 mg/kg soil), i.e., we apply Fenton oxidation in which ethanol is added to increase fluorene removal. To obtain maximum fluorene removal efficiency, a minimum of 1.0 ml of ethanol, 0.35 ml of H_2O_2, and 0.2 ml of 0.5M Fe^(2+) was needed per 1 g of fluorene-contaminated soil. Under optimal Fenton oxidation conditions, 13% of 9-fluorene was generated during Fenton oxidation of 43% fluorene. The biodegradability of 9-fluorenone was subsequently confirmed to be much more rapid than that of fluorene, i.e., biodegradability of 96% versus 35% over 31 days. These results demonstrate that the proposed treatment method can be effectively applied to remove fluorene prior to disposal at industrial waste sites.
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