土壤铬污染场迁移监测技术及参数反演研究.pdfVIP

摘要

污染区监测效果的影响，综合视幅频率和视电阻率曲线变化规律，可较好的确定

铬重污染区域的方位，且起伏地形下具有较高的监测精度。

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（）搭建铬重金属土壤样品复电阻率幅值谱和相频谱特性实验测试平台，分

析了土壤铬污染浓度、含水率、孔隙率对复电阻率幅值谱和相位谱的影响；以实

测数据为基础，用Matlab软件反演土壤样品零频电阻率和Cole-Cole模型四个参

数，得到零频电阻率与实测土样电阻率的相对误差仅有2.28%，反演精度可靠。

关键词：铬污染场迁移；直流激电法；双频激电法；Cole-Cole模型；参数反演

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Abstract

Abstract

Soilheavymetalpollutionisthemostprominentenvironmentalpollutionproblem

inChinaatpresent,inwhichchromiumsoilpollutionhascausedseriousimpactsonthe

ecologicalenvironmentandhumanhealth.Chromiumhasanumberofdifferentvalence

statesinthesoil,withhexavalentchromiumbeingthemostharmfulbecauseitishighly

lethal,indegradable,solubleandmobilecomparedtotrivalentchromium.Atthesame

time,themigrationanddiffusionofchromiumcontaminatedfieldsinthesoilwill

furtherexacerbatethecontaminationofthesoilaroundthem.Itisparticularlyimportant

tomonitorinrealtimetheextentanddegreeofcontaminationcausedbythemigration

processofchromiumcontaminatedfields.Atpresent,thecommonlyusedlaboratory

soilheavymetalpollutionmonitoringmethodsmainlyincludeex-situandin-situ

monitoringmethod.Ex-situmonitoringmethodislongandcostly.In-situmonitoring

methodislowinprecision,mostlyrelyingontheempiricalvalueandchangeruleto

definethescopeofpollution.Soilheavymetalpollutionmonitoringphysical

explorationmethodsmainlyincludeground-penetratingradarmethod,electromagnetic

method,resistivitymethodandinducedpolarization(IP)method.The

ground-penetratingradarmethodisnotapplicabletoclay,saltwaterandpowderysandy

geology.Theelectromagneticmethodofmeasur