Abstract：The experiment combined nanobubbles (diameter 50~270nm) with ozone, compared the improvement effect of ozone nanobubbles on the removal of diesel pollutants in soil by three surfactants. What is more, the influence of different treatments on pollutant removal rate, such as surfactant concentration, soil property and soil aging time, were also investigated. The soil samples treated in different ways were characterized by XRD and FTIR, as well as the degradation products of diesel components were analyzed by GC/MS. The results showed that under the same conditions, the elution efficiency of the three surfactants to diesel also increased with the increase of the concentration, and the elution capacity was SDS>SDBS>TX-100. The removal effect of the surfactant on the pollutants was significantly increased within 30minutes of the stirring experiment, and the growth rate slowed down between 30 and 40minutes. The removal rate of pollutants in sandy soil by ozone nanobubbles was significantly higher than that in loam soil, both the removal rate of diesel oil in sandy soil and loam soil increased by about 13% and 9%, respectively. The aging time of pollutants in the loam was inversely proportional to the removal rate but the ozone nanobubble treatment also significantly improved the diesel oil removal rate in the loam with a longer aging time, and increased by nearly 8% for the polluted loam aged for 60 days. The analysis of FTIR spectroscopy indicated that the surfactant containing ozone nanobubbles could reduce the effect on the main functional groups of organic matter in the soil. According to GC/MS spectrum showed that the residual pollutants were mainly alkanes, and the degradation difficulty order was alkanes
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