Abstract To remediate petroleum-contaminated soil, a DC powered electrokinetic reactor was used with amended biosurfactant concentrations of 28 g/L, 56 g/L, and 84 g/L to enhance the extraction of oil from the soil and aid in the biodegradation of the remaining oil by hydrocarbon-degrading microbes. The highest oil extraction of 83.15 ± 1.97 % was obtained with the biosurfactant concentration of 56 g/L while the highest degradation was observed when 84 g/L of biosurfactants were used. The bacteria survived the electro-halo-thermal environment and degraded the remaining hydrocarbons to as low as 0.0405 ± 0.057 mg of carbon/mg of soil when 84 g/L of biosurfactants were used. Microbial growth was however affected by the relentlessly changing pH in the reactor. The presence of biosurfactants significantly aided in oil recovery and biodegradation in the first 96 h of the experiments.

中文翻译：

---

生物表面活性剂在石油污染土壤生物电动修复中作为破乳增强剂

摘要 为了修复石油污染的土壤，使用直流动力电动反应器，将生物表面活性剂的浓度分别调整为 28 g/L、56 g/L 和 84 g/L，以增强从土壤中提取油的能力，并有助于土壤的生物降解。碳氢化合物降解微生物残留的油。生物表面活性剂浓度为 56 g/L 时，油提取率最高，为 83.15 ± 1.97 %，而生物表面活性剂浓度为 84 g/L 时，降解率最高。当使用 84 g/L 的生物表面活性剂时，细菌在电-卤-热环境中存活下来，并将剩余的碳氢化合物降解至低至 0.0405 ± 0.057 mg 碳/mg 土壤。然而，微生物生长受到反应器中不断变化的 pH 值的影响。