污染土壤中PAHs处理技术研究进展

陈述了污染土壤中多环芳烃（PAHs）处理技术的研究进展，介绍了挥发性和半挥发性污染土 壤的几种处理方法，并重点对水蒸汽剥离法实验装置及流程作了介绍。分析了温度、压力等因素对PAHs脱附的影响，指出了今后处理污染土壤中 PAHs的研究方向。

Advances in the techniques for polycyclic aromatic hydrocarbons (PAHs) removal from contaminated soils

In recent years, soil contamination by Polycyclic Aromatic Hydrocarbons (PAHs) has become a grave issue of the environment. Due to leakage of industrial wastes and sedimentation of particulates in the air, the surface soils could contain high-grade organic contaminants such as PAHs. In this paper, the primary sources of PAHs emissions and toxicity accumulation of the substances were recounted. The advances in the techniques for PAHs removal from contaminated soils were reviewed. Some techniques for the removal of volatile and semi-volatile pollutants in soils were depicted, especially the steam stripping technique, which has proved itself to be appropriate for cleaning contaminated solids. The experimental setup and process flow of the steam stripping technique were described, and the effects of temperature and pressure on desorption of PAHs were investigated. In addition, research works to be carried out in future on the techniques for PAHs removal were shown clearly.