Abstract:

This paper introduces the harm of light non-aqueous phase fluid(LNAPL), its migration complexity in groundwater environment and the corresponding remediation technology. By summarizing the reservoir conditions, migration mechanism and remediation technology of petroleum pollution, it is concluded that the migration of LNAPL in groundwater environment is affected by the main control factors such as the thickness of the aeration zone and aquifer, the soil characteristics and organic content in the stratum, the buried depth of the groundwater table, the flow direction, the flow rate and so on. Different remediation technologies can be used according to different reservoir conditions and hydrogeological conditions. Hydraulic capture technology and extraction technology can be used for oil-phase reservoir remediation. Air sparging(AS), permeable reactive barrier(PRB) and microbial remediation technology can be used for aqueous-phase reservoir remediation. And blow-off technology can be used for gas-phase reservoir remediation.

Key words: petroleum, contaminated soil, LNAPL, migration mechanism, oil slick extraction, solid phase pollution control, volatile pollution control;

摘要：

介绍了轻质非水相流体的危害、在地下水环境中迁移的复杂性以及修复技术等。通过对石油类污染赋存状态、迁移机理、修复技术进行概述，得出轻质非水相流体在地下水环境中的迁移受到包气带和含水层厚度，地层中土壤特性及有机物含量，地下水位的埋深、流向、流速等主控因素的影响。根据不同的赋存状态结合水文地质条件可使用不同的修复技术，水力截获技术、抽提技术可用于油相赋存状态污染修复，曝气技术、渗透性反应墙技术、微生物修复技术可用于水相赋存状态污染修复，吹脱技术可用于气相赋存状态污染修复。

关键词: 石油类, 污染土壤, 轻质非水相流体, 迁移机理, 浮油萃取, 固相污染治理, 挥发性污染治理