典型焦化污染场地多技术联用治理工程应用案例分析

典型焦化污染场地具有明显的多环芳烃和重金属复合污染特征，单一修复技术往往难以完成治理。多技术联用修复焦化污染场地土壤已开展了应用实践，但联用技术适用的场地污染特征和工程技术问题还鲜有报道。焦化场地多环芳烃和重金属主要分布在浅层土壤中，复合污染普遍，但2类污染物互相作用影响小，适合采用以土壤淋洗为核心的联用修复技术，其具有节省修复周期和成本的工程应用优势，二次污染防治是其技术难点，未来可发展土壤淋洗+化学氧化+生物修复联用技术，进行绿色修复。

Analysis of application cases of multi-technology combined treatment for typical coking contaminated site

Typical coking-contaminated sites have obvious composite pollution characteristics of polycyclic aromatic hydrocarbons (PAHs) and heavy metals, and single remediation technology is often difficult to complete the treatment. The application practice of multi-technology combined remediation has been carried out, but the site pollution characteristics and engineering technical problems applicable to the combined application technology are rarely reported. PAHs and heavy metals in the coking-contaminated sites are primarily distributed within the shallow soil, indicating compound pollution. However, there is minimal interaction between these two kinds of pollutants. Therefore, a combined remediation technology with soil leaching as its core is suitable for application due to its advantages of saving restoration cycle and cost. The main technical challenge lies in preventing and controlling secondary pollution. In the future, a synergistic approach combining soil leaching, chemical oxidation, and bioremediation technologies can be developed for environmentally-friendly restoration.