IMPROVEMENT OF DETECTION TECHNOLOGY FOR NAPLs POLLUTION IN GROUNDWATER

改进确定污染源和范围的技术是实地调查、调查污染物迁移过程和修复过程的关键。该项目由两部分组成，一部分是现有污染识别技术的比较，另一部分是污染物运移机制的研究。首先，选取了7个NAPLS污染案例，阐明了地貌、地质和地下水运动对污染过程的影响。其次，对现有的污染物检测技术进行了比较，验证了它们在现场应用的可行性。第三，在小尺度(柱状)和中尺度(蒸渗仪)上研究了饱和-非饱和区的TCE溶液和气态TCE行为。最后，对互联网上的非饱和带污染、修复措施和地下水污染信息进行了综述。然而，很少有研究对那里污染物的现状和行为进行清理。检测技术的进步不仅仅意味着开发新的方法，而且在很大程度上取决于我们对污染物行为的认识。应该说，这里获得的数据和知识可以作为今后改进污染物检测技术的指导。

Improvement of technology for identifying sources and range of pollution is key in field surveys, investigation of pollutant migrations processes, and remediation processes. This project is constituted of two parts, one is the comparison of available technology for pollution identification, and the other is investigation of pollutant migration mechanisms.At first, seven cases of NAPLs pollution have been chosen to make clean how effects of geomorphology, geology and groundwater movement on the pollution processes. Secondly, available technologies for pollutant detection were compared with each other to check their feasibilities used in field. Thirdly, TCE solution and gaseous TCE behaviors in saturated-unsaturated zone have been investigated on small scale (columns) and median scale (lysimeter). Finally, NAPLs pollution, remediation measures and groundwater pollution information in Internet have reviewed.According to our researches, many NAPLs pollution cases were found in unsaturated zone. However, little research has been done to make clean the present, behaviors of pollutants there. Improvement of detection technology is not meant only to develop new method, but depends largely on our knowledge on pollutants'behaviors. It should be said that the date and knowledge obtained here can be used as the guideline for improving pollutant detection technology in future.