催化过氧化氢对石油烃污染土壤的氧化能力

张秋子; 韦云霄; 姜永海; 魏晓飞; 汪福旺

doi:10.3969/j.issn.1674-991X.2017.01.010

催化过氧化氢对石油烃污染土壤的氧化能力

doi: 10.3969/j.issn.1674-991X.2017.01.010

1.
北京建工环境修复股份有限公司,北京 100015
2.
中国环境科学研究院,北京 100012

详细信息

作者简介:
张秋子(1984—),女,硕士,主要从事污染场地修复技术研究, zhangqiuzi@bceer.com

通讯作者:
韦云霄 E-mail: weiyunxiao@bceer.com

中图分类号: X53
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出版历程
- 收稿日期: 2016-06-03
- 刊出日期: 2017-01-20

Oxidizing capacity of catalyzed hydrogen peroxide to petroleum hydrocarbon contaminated soil

1.
Beijing Construction Engineering Group Environmental Remediation Co., Ltd., Beijing 100015, China
2.
Chinese Research Academy of Environmental Sciences, Beijing 100012, China

More Information

Corresponding author: Yunxiao WEI E-mail: weiyunxiao@bceer.com

摘要

摘要: 针对催化过氧化氢对石油烃污染场地土壤进行异位氧化修复,通过使用不同浓度过氧化氢及不同摩尔比的过氧化氢和催化稳定剂与污染土壤进行反应,比较过氧化氢在不同条件下对石油烃的氧化降解性能。结果表明:催化过氧化氢反应过程中产生的中间产物羟基自由基和超氧阴离子为最主要的氧化基团;当过氧化氢浓度为0.50%~1.00%,氧化剂与催化稳定剂摩尔比为75∶1~100∶1时,总石油烃的降解率较高;过高的过氧化氢浓度或过低的氧化剂与催化稳定剂摩尔比会导致过氧化氢分解过快,氧化剂与污染物的接触时间降低,从而达不到理想的污染物去除率;过氧化氢在快速分解时,优先氧化碳数较低的石油烃。
- 过氧化氢 /
- 石油烃 /
- 催化氧化 /
- 降解率 /
- 土壤修复
Abstract: Regarding to the petroleum hydrocarbon polluted sites that are remediated with H₂O₂ based ex-situ chemical oxidation, the oxidizing capacity and reactive process of catalyzed H₂O₂ were studied with different H₂O₂ mass fractions and oxidant to catalyst/stabilizer ratios. It is found that hydroxyl radical and superoxide anion are the major oxidation groups. The H₂O₂ mass fraction of 0.50%-1.00% and the oxidant to catalyst/stabilizer ratio of 75∶1-100∶1 provide higher total petroleum hydrocarbon (TPH) degradation rate. The results demonstrated that high H₂O₂ concentration and low oxidant to catalyst/stabilizer ratio may lead to rapid H₂O₂ decomposition that reduce the contact time between oxidant and contaminant and decrease the oxidizing efficiency. In addition, it is also found when H₂O₂ is under rapid decomposition, it tends to oxidize hydrocarbon molecules with less carbon number.
- hydrogen peroxide /
- petroleum hydrocarbon /
- catalytic oxidation /
- degradation rate /
- soil remediation

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参考文献(22)

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