石油污染土壤地下水修复拖尾反弹及控制措施

Tailing and Rebounding in the Remediation of Oil-contaminated Soil and Groundwater and Control Measures

在石油污染土壤地下水治理过程中,拖尾和回弹是修复难以达到预期目标的重要因素,导致修复时间延长和修复成本增加。表面活性剂增强修复(SER)在抑制石油污染土壤地下水修复治理拖尾反弹方面表现出色。分析了石油污染土壤地下水修复拖尾和反弹效应产生的原因,并介绍了拖尾和反弹效应的两项控制措施:使用表面活性剂泡沫和添加剪切稀化聚合物达到黏度控制效果,进而促进表面活性剂均匀分布,提高低渗透区的洗脱效率;表面活性剂增强原位化学氧化,有助于增强石油污染物的氧化降解,同时避免无二次污染。

In the process of oil-contaminated soil and groundwater treatment, tailing and rebounding are important factors that make it difficult to achieve the expected goals, resulting in prolonged remediation time and increased remediation costs. Surfactant-enhanced remediation(SER) has performed well in suppressing tailing and rebounding in the remediation of oil-contaminated soil and groundwater.In this article, the causes of tailing and rebounding effect were analyzed, and two control measures for tailing and rebounding effect were introduced as follows: surfactant foam and adding shear thinning polymers were used to achieve viscosity control effect and promote the uniform distribution of surfactants to improve the elution efficiency in the low-permeability zone;surfactants were used to enhance in-situ chemical oxidation to enhance the oxidative degradation of petroleum pollutants, while avoiding secondary pollution.