PFAS 处理：有关科学和应用现状的更多信息.pdf

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1、Evaluation of PFAS Removal by Surface Active Foam Fractionation and Destruction by Electrochemical OxidationHanna Temme,PhDLaura LewisRebecca MoraProject Area Twin Cities east metro area,Minnesota Over 125 sq miles of PFAS impacted groundwater and surface water PFOS ImpactsFeasibility Study Completi

2、ng a feasibility study for Minnesota Pollution Control Agency(MPCA)to address PFAS impacts MPCA considering multiple technologies and treatment train alternatives Specifically considering technologies that may reduce filtration mediaPossible Treatment Train Surface Active Foam Fractionation(SAFF)one

3、 possible technology SAFFcould be used as a standalone technology or as pretreatment to filtration to reduce costs Pilot study focused on SAFFPre-Treatment followed by destruction of concentrateSAFF Pre-TreatmentGAC/IX PolishingPFAS Impacted Surface Water and GroundwaterDisposal or DestructionSecond

4、ary FractionateSAFF EffluentClean Water for Distribution,Injection,or DischargeSpent MediaSurface Active Foam Fractionation(SAFF)1.Inject air into water2.PFAS foams3.Remove foamPilot study used a SAFF20 from EPOCNo surfactants usedSAFF:Two Stages ProcessPrimary Fractionation Goal:Minimize PFAS conce

5、ntration in effluentSecondary FractionationGoal:Minimize volume of PFAS concentrate prior to destruction or disposalFoam and top layer of water flow over cone and captured in top hoodInjected air bubbles promote foam formationPFAS foam vacuumed offInjected air bubbles promote foam formation and carr

6、y PFAS upwardWater SourcesSite selected because of access to impacted surface water and impacted aquifersRaleigh CreekShakopee Aquifer Monitoring WellFoam readily forms on Raleigh CreekPFOSPFOATotal Organic CarbonRaleigh Creek2,000-3,000 ng/L700-900 ng/L6.5 mg/LShakopee Aquifer950 ng/L330 ng/L0.5 mg