Diesel fuel contamination of aquifers is a global environmental problem. In recent years, in situ thermal remediation (ISTR) has attracted much attention owing to its advantages of high removal rate and rapid remediation. In this study, the treatment of a diesel-contaminated aquifer with thermal conduction heating (TCH) was studied. And for the purpose of making full use of the TCH residual heat, its combination with in situ chemical oxidation (ISCO) was also investigated. Results show that a maximum total petroleum hydrocarbon (TPH) removal of 70.3% or 81.73% was observed for the TCH treatment of the solid or water phase, respectively, highlighting the possibility of successfully and simultaneously remediating both aquifer phases. The effect of evaporation/boiling plays a major role in final contaminant removal processes. And the water-diesel mixture started co-boiling at 100.3℃ theoretically according to Antoine equation and Raoult’s law. The higher the temperature is, the higher the initial TPH concentration and the larger the removal rate of pollutants. The dosage of persulfate (PS) required by the system became lower with the temperature increasing, and the contribution of oxidation to the pollutant removal became greater, with the proportion of oxidation increasing from 29.05 to 66.87% from 40 to 80 °C. In the 2-D remediation experiment, the area of the heated zone above 80℃ accounted for 71.0% of the whole tank. At the heating time of 180 min, the average aqueous TPH concentration in the tank was about 248.7 mg/L and a lowest concentration of 73.1 mg/L was found around the heating resistance. During the cooling process after TCH, 97.9% of the heated area of the tank was above 30 °C when the heating resistance was turned off for 6 h, which was sufficient to activate PS for removing pollutants. Hence, TCH treatment could be an optimal method for the rapid remediation of diesel-contaminated aquifers, and the combination of TCH and ISCO can not only expand the treatment zone, but also reduce the cost of remediation.

含水层的柴油燃料污染是一个全球性的环境问题。近年来，原位热修复（ISTR）因其去除率高、修复速度快等优点而备受关注。在这项研究中，研究了用热传导加热 (TCH) 处理柴油污染的含水层。并且为了充分利用TCH余热，还研究了其与原位化学氧化（ISCO）的结合。结果表明，对于固相或水相的 TCH 处理，观察到的最大总石油烃 (TPH) 去除率分别为 70.3% 或 81.73%，突出了成功并同时修复两个含水层相的可能性。蒸发/沸腾的影响在最终污染物去除过程中起着重要作用。根据Antoine方程和Raoult定律，理论上水-柴油混合物在100.3℃开始共沸。温度越高，初始TPH浓度越高，污染物去除率越大。系统所需的过硫酸盐（PS）用量随着温度的升高而降低，氧化对污染物去除的贡献变大，氧化比例从40～80℃由29.05%增加到66.87%。在二维修复实验中，80℃以上加热区面积占整个罐体面积的71.0%。在 180 min 的加热时间，罐中的平均水溶液 TPH 浓度约为 248.7 mg/L，在加热电阻附近发现最低浓度为 73.1 mg/L。在TCH后的冷却过程中，97。关闭加热电阻 6 h 时，罐内 9% 的受热面积在 30°C 以上，这足以激活 PS 去除污染物。因此，TCH处理可能是柴油污染含水层快速修复的最佳方法，TCH与ISCO的结合不仅可以扩大处理区域，还可以降低修复成本。