Environmental Prediction Model for Dynamic Release of Lead in Contaminated Soil under Washing Remediation

Electronic journal of geotechnical engineering

Lei Liu¹  Jiang-shan Li¹  Ping Wang¹ 

[1] State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;

关键词: Lead contaminated soil;    washing remediation;    adsorption-desorption;    prediction model.;   

DOI  :  

来源: Oklahoma State University

【 摘 要 】

Adsorption-desorptioncharacteristicsandmodelforleadcontaminatedsoilwithdifferentconcentrationwerestudiedbybatchtestsinlaboratory.ResultsshowedthatLangmuirequationcouldbetterfitisothermaladsorptioncurveoflead,withtheincreasingofleadinsoil,thetimeforleadtoreachequilibriumextended.DesorptionprocessofleadunderthewashingofNa2EDTAcouldbedividedintotwophase,thatwasrapiddesorptionphaseandslowdesorptionstage,andtheturningpointwasabout200min.Dualconstantequationcouldeffectivelyreflectthedesorptionkineticsprocessofleadincontaminatedsoil.Adynamicmodelfordescribingthemigrationprocessofleadincontaminatedsoilunderwashingwasestablishedbasedondesorptionkineticsequation,soilmoisturemigrationequationandsolutetransportequation.Numericalsolutionforthemodelwassolvedandthevalidityofwhichwasverifiedbasedonmonitoringdates.Themigrationlawofleadincontaminatedsoilunderwashingwasobtainedthroughnumericalsimulatingofasimplecondition.

【 授权许可】

Unknown