多环芳烃类有机污染场地原位电热脱附修复工程实例

Engineering projec to fin-situ electrothermal desorption remediation of organic contaminated sites containing polycyclic aromatic hydrocarbons(PAHs)

为推广有机污染场地原位电热脱附修复技术,基于华东某退役化工厂污染场地应用原位电加热修复的工程实例,论述了场地污染特点、工程设计情况,总结了工程运行管理情况,分析了场地加热温升、污染物去除效果、修复技术优势等。工程运行结果表明,加热运行250 d后,场地土壤的温度整体达到300℃以上,多环芳烃(PAHs)去除率达到99.99%以上,修复后土壤中PAHs浓度低于修复目标值。同时工程运行期间场地无明显异味。

In order to popularize the in-situ electrothermal desorption remediation technology of organic contaminated sites,the site pollution characteristics and the engineering design are discussed,the engineering operation management is summarized,and the site heating,the pollutant removal effect and the remediation technology advantage are analyzed based on the engineering project of applying in-situ electrothermal remediation to the contaminated site of a certain retired chemical plant in east China.The operation results show that after 250 d of heating,the overall temperature of the site soil reaches above 300℃,the removal rate of polycyclic aromatic hydrocarbons(PAHs)reaches more than 99.99%,and the PAHs concentration in the soil after remediation is lower than the remediation target value.Meanwhile,the site has no obvious odor during the operation period.