| 李方敏,柳红霞,梅 平,李凡修,刘迪佩.络合剂改进Fenton反应去除土壤中石油污染物的效果[J].农业环境科学学报,2014,33(1):88-94. |
| 络合剂改进Fenton反应去除土壤中石油污染物的效果 |
| Enhanced Removal of Soil Petroleum Pollutants by Modified Fenton Reaction with Chelating Agents |
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| DOI：10.11654/jaes.2014.01.011 |
| 中文关键词: 络合剂 Fenton氧化 石油污染 土壤修复 |
| 英文关键词: β-cyclodextrin disodium EDTA sodium citrate sodium oxalate petroleum contamination soil remediation |
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| 中文摘要: |
| 为构建用于石油污染土壤修复的自然土壤pH条件下具有较强氧化能力和温和的Fenton反应，以室内模拟石油污染土壤为对象，采用L8（4×24）正交试验设计，研究了4种络合剂类型、用量和[H2O2]/ [Fe3+]等因素对改进型Fenton反应去除石油污染物效果的影响，并对各处理土壤中残油进行了气相色谱分析。结果表明：经48 h反应后，络合剂β-环糊精、草酸钠、EDTA二钠和柠檬酸三钠改进Fenton处理对土壤中石油烃类清除率分别为41.5%、30.6%、27.6%和25.3%，而无络合剂的对照处理为13.6%；较高络合剂用量和氧化剂用量的Fenton处理，更有利于nC21以下中、短链正烷烃的氧化分解，对姥鲛烷、植烷及iC17~ iC18的异构烷烃也有较好的降解效果；其中以β-环糊精去除土壤中石油烃类效果最好，络合剂改进的Fenton反应能够无选择性地去除石油烃类诸组分。 |
| 英文摘要: |
| 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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