Abstract:

In an attempt to enhance the effectiveness of air sparging, series experiments were designed to investigate the influencing factor of surfactant-enhance air sparging（SEAS） in order to conform the surfactant selection method. The results show that foamability and foam stability are decisive factors of air saturation in SEAS when the mode of injected air is bubbles, nevertheless, the value of capillary pressure caused by surface tension is the decisive factor of air saturation in SEAS when the mode of injected air is channels. By comparing the adsorption of Tween-80,TritonX-100,SDS and SDBS in medium, it found that TritonX-100 suits for medium sand and SDBS suits for gravel.

Key words: SEAS, surfactant, foam stability, surface tension, selection method