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KMID : 0382419980240030063
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Korean Journal of Environmental Health Society
1998 Volume.24 No. 3 p.63 ~ p.69
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A Study on the Factors of Fenton-oxidation of MTBE in Water and Soil
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Jeon Eun-Mi
Park Seok-Hwan
Zong Moon-Shik
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Abstract
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The treatment of soils and water contaminated with MTBE using the Fenton oxidation was investigated. The effects of dosage of H_2O_2, and Fe^2+ concentrations, and solution pH on transformation and mineralization in soil were evaluated. Generation of TBA and acetone following Fenton-oxidation of MTBE in water and generation of acetone following Fenton -oxidation of TBA were observed. Therefore TBA and acetone are degradation intermediates of MTBE. There was a large difference of treatment efficiency in Fenton oxidation of MTBE between soil and water system. This may be caused by the complex nature of soil, soil organic matter which can consumed OH ·radicals, and interacting with inorganic-soil constituents. The pH of soil was observed to have a significant effect on the chemical oxidation efficient of MTBE in soil The data demonstrated that optimal pH range were pH 3∼4 and around 6. The soil batch studies demonstrated that treatment efficiency of MTBE was enhanced by adding additional ferrous salts but Fenton-oxidation occurred in no additional iron which indicated that iron in soil can catalyze the Fenton-oxidation. The most effective parameter of Fentonoxidation was H_2O_2/Fe^2+ ratio which theocratical ratio is 0.5. The optimal range of this ratio was found to be 0.6∼2.3. In evaluating effect of H_2O_2 dosage on treatment efficiency, the increase of H_2O_2 did not always lead to increase of decompositions of MTBE in soil. Fenton oxidation was effective in destroying MTBE in aqueous extracts of contaminated soil and water. Experimental data provided evidence that the Fenton oxidation can effectively remediate MTBE-contaminated water and soil.
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