戚惠民¹
1.上海市地矿工程勘察院，上海 200072

Application of ex-situ Fenton-like chemical oxidation in remedying PAHs polluted site

QI Huimin¹
1.Shanghai Institute of Geological Engineering Exploration, Shanghai 200072, China

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摘要:多环芳烃作为土壤的主要污染源之一，其修复技术的研究对土壤可持续利用具有重要的意义；但目前的研究主要基于室内小试实验，对具体修复技术在实际现场中的应用少有报道。基于上海青浦区西虹桥沈海高速东侧17-02污染场地的工程实践，结合室内实验，详细地介绍了原场异位类Fenton化学氧化修复多环芳烃污染土壤施工工艺。处理结果表明：以柠檬酸为催化助剂的类Fenton化学氧化能够有效地处理场地污染土壤中的苯并(a)蒽、苯并(a)芘、苯并(b)荧蒽和茚并(1, 2, 3-cd)芘等超标污染物；修复后场地土壤各项物理指标相比修复前变化较小；同时，类Fenton氧化反应放热，修复过程中土壤微生物能够将有机柠檬酸快速降解，有效降低了化学氧化对土壤pH的影响。
关键词: 多环芳烃（PAHs）/
土壤修复/
类Fenton试剂/
柠檬酸

Abstract:Polycyclic aromatic hydrocarbons (PAHs) is one of the major pollution sources of soil, and the study on its remediation technology is of considerable importance in the sustainable use of soil. However, current study was mainly based on the laboratory tests, and the remediation technology application in actual polluted site was seldom reported. In this study, on the basis of the remediation engineering practice and laboratory tests of the No.17-02 polluted site at the east side of Shenhai expressway in Xihongqiao, Qingpu district, Shanghai, the remediation process for PAHs polluted site with the ex-situ Fenton-like chemical oxidation technology was illustrated in detail. The results showed that the Fenton-like chemical oxidation with a catalytic agent of citric acid could effectively deal with the excessive pollutants of benzo (a) anthracene, benzo (a) pyrene, benzo (b) fluoranthene and indeno (1, 2, 3-cd) pyrene in the soil of polluted site. And slight changes occurred in the physical indexes of the polluted soil before and after remediation. Meanwhile, Fenton-like chemical oxidation is an exothermic process, during which soil microorganisms can rapidly degrade organic citric acid, and the influence of chemical oxidation on soil pH was effectively reduced.
Key words:polycyclic aromatic hydrocarbons (PAHs)/
soil remediation/
Fenton-like reagent/
citric acid.

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刊出日期:2018-11-12

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异位类Fenton化学氧化在多环芳烃污染场地修复中的应用

戚惠民¹
1.上海市地矿工程勘察院，上海 200072
基金项目:
关键词: 多环芳烃（PAHs）/
土壤修复/
类Fenton试剂/
柠檬酸
摘要:多环芳烃作为土壤的主要污染源之一，其修复技术的研究对土壤可持续利用具有重要的意义；但目前的研究主要基于室内小试实验，对具体修复技术在实际现场中的应用少有报道。基于上海青浦区西虹桥沈海高速东侧17-02污染场地的工程实践，结合室内实验，详细地介绍了原场异位类Fenton化学氧化修复多环芳烃污染土壤施工工艺。处理结果表明：以柠檬酸为催化助剂的类Fenton化学氧化能够有效地处理场地污染土壤中的苯并(a)蒽、苯并(a)芘、苯并(b)荧蒽和茚并(1, 2, 3-cd)芘等超标污染物；修复后场地土壤各项物理指标相比修复前变化较小；同时，类Fenton氧化反应放热，修复过程中土壤微生物能够将有机柠檬酸快速降解，有效降低了化学氧化对土壤pH的影响。

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