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| Enhanced Removal of Soil Petroleum Pollutants by Modified Fenton Reaction with Chelating Agents |
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| KeyWord:β-cyclodextrin; disodium EDTA; sodium citrate; sodium oxalate; petroleum contamination; soil remediation |
| Author Name | Affiliation | | LI Fang-min | School of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China | | LIU Hong-xia | School of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China | | MEI Ping | School of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China；Branch Laboratory of Yangtze University, HSE Key Laboratory of PetroChina Company Limited, Jingzhou 434023, China | | LI Fan-xiu | School of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China；Branch Laboratory of Yangtze University, HSE Key Laboratory of PetroChina Company Limited, Jingzhou 434023, China | | LIU Di-pei | School of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China |
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| Abstract: |
| In order to better use the traditional Fenton reaction to remediate petroleum contaminated soils, a simulated petroleum-contaminated soil（light silty loam soil） was used to examine removal efficiency of the petroleum by Fenton reaction modified with chelating agents in a laboratory. Four chelating agents and their rates and [H2O2]/[Fe3+] ratios were assessed using a orthogonal L8（4×24） design. After a 48 h′s Fenton reaction, removal percentages of petroleum hydrocarbon were 41.5%, 30.6%, 27.6% and 25.3% for chelating agents β-cyclodextrin, sodium oxalate, disodium EDTA and sodium citrate, respectively, compared to a 13.6% removal efficiency in the control without chelating agents. Higher rates of chelating agents or oxidants yielded greater removal of normal-alkanes with carbon atomic number less than 21. Removal of pristane, phytane and iso-alkanes with iC17 to iC18 was also enhanced by chelating agents-modified Fenton reaction. The findings indicate that the modified Fenton oxidation with β-cyclodextrin could be used to effectively remove petroleum from soils. |
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