Abstract: Multi-phase extraction(MPE ) technology is one of the mainstream technologies now applicable in the world for remediation of soil and groundwater polluted by organic pollutants. Typically, it pumps simultaneously soil gas, groundwater and non-aqueous phase liquid up to the ground for separation and treatment so as to achieve rapid pollution control and simultaneous remediation of polluted soil and groundwater. To deepen the knowledge of the technology, process features and technical principles of MPE are introduced, and key points and designing ideas of MPE and its advantages and disadvantages relative to conventional remediation technologies summarized. In light of the characteristics of the MPE technology, methods for evaluation of applicability of the technology in areas with specific soil aeration zone, water-containing layer and pollutants are analyzed and summarized. In the end, several typical cases of application of the MPE technology are cited.

Key words: multi-phase extraction（MPE）, remediation, soil, groundwater, feasibility assessment