电磁剖面法在污染物探测及修复效果评价中的应用

Application of electromagnetic profiling in pollutant detection and remediation effect evaluation

近年来,伴随产业结构和土地利用的调整,一些受到污染的土地被重新开发利用,污染物时刻威胁着人们的健康。现阶段污染物调查工作中常采用有损的、侵入式的挖掘和钻探方法,调查结果为散点状且易造成二次污染。常见的污染物主要分为重金属、轻非水相液体(LNAPL)、重非水相液体(DNAPL)、总石油碳氢化合物(TPH)和多氯联苯(PCB)等,相对于周围土体存在电性差异。文章给出了一种电磁剖面法圈定污染物范围,通过对不同时间节点探测结果的数据分析,实现对环境治理效果的定性评价。通过工程实例,说明了该方法的可行性和有效性。在污染物调查阶段,该方法可以准确圈定污染物范围;在修复治理期间,在不同时间节点的场地污染物探测,可以评估修复效果。

In recent years,with the readjustment of industrial structure and land use,polluted land has been redeveloped and utilized,but the pollutants remain a threat to people's health.At present,destructive and intrusive excavation and drilling methods are often used in pollutant investigation,resulting in scattered survey spots that are easy to cause secondary pollution.Common pollutants are mainly classified into heavy metals,light nonaqueous-phase liquids(LNAPL),dense nonaqueous-phase liquids(DNAPL),total petroleum hydrocarbons(TPH)and polychlorinated biphenyls(PCB),which have electrical differences compared with surrounding soil.In this paper,an electromagnetic profiling method is proposed to delineate the pollutant range.Through analysis of the detection results at different time nodes,the qualitative evaluation of the environmental treatment effect is realized.The feasibility and effectiveness of the method are illustrated by an engineering example,which proves that this method can accurately delineate the pollutant range in the pollutant investigation stage.During the restoration and treatment period,the site pollutant detection at different time nodes can evaluate the restoration effect.