VOCs/SVOCs污染土壤常用修复技术及其在美国超级基金污染场地中的应用

Common Used Remediation Technologies for Volatile and Semivolatile Organic Compounds Contaminated Soils and Their Application in US Superfund Sites

  • 摘要: 美国超级基金污染场地修复实践表明,美国有84%的污染土壤是由挥发性有机物(VOCs)或半挥发性有机物(SVOCs)引起的。发达国家对VOCs/SVOCs污染土壤的工程修复技术已较为成熟,并广泛应用。我国污染场地修复处于起步和发展阶段,相应的实际工程修复案例较少。对目前国内外常用的VOCs/SVOCs污染土壤修复技术进行讨论,重点介绍了土壤气提、土壤淋洗、固化/稳定化、热处理和生物泥浆系统的原理,并对其修复效果 、周期 、成本和适用范围进行比较,探讨了修复技术的应用情况和发展趋势,以期为我国和其他发展中国家的VOCs/SVOCs污染土壤修复提供参考和建议。

     

    Abstract: The US Superfund contaminated sites remediation practice shows that 84% of soil contamination is caused by volatile organic compounds (VOCs) or semivolatile organic compounds (SVOCs). The remediation technologies of VOCs/SVOCs-contaminated sites have been relatively mature and widely used in developed countries; in contrast, there are less cases of engineering remediation application in China due to that site remediation has just started in our country. In this paper,common organic contaminated soil remediation technologies in both China and abroad are introduced,with the focus on the principle of soil vapor extraction, soil flushing/washing, solidification/stabilization, thermal treatment/desorption and bioslurry systems. The efficiency, duration, cost and application of these technologies are compared, and current and future applications of these technologies are discussed. This review provides references and suggestions to the remediation of VOCs/SVOCs-contaminated sites in China and other developing countries.

     

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