地下水中PFAS的超声破坏、水成膜泡沫和调查衍生废物.pdf

1、Sonolytic Destruction of PFAS in Groundwater,Aqueous Film-Forming Foam,and Investigation Derived WasteShaily Mahendra,Professor and Samueli FellowUCLA Civil and Environmental EngineeringThanks to$Thanks to$ponsorsponsors and Collaboratorsand Collaborators NAVFAC EXWC:Jovan Popovic,Anthony Danko GSI

2、Environmental:Poonam Kulkarni,Stephen Richardson,David Adamson,Blossom Nzeribe Colorado State University:Jens Blotevogel,Andrea Hanson Rhoads,Greg Dooley PCT Systems:Sharyl Maraviov UCLA:Sanjay Mohanty,Shashank Singh KalraPrinciples of SonochemistryPrinciples of SonochemistryMechanism of Destruction

3、Mechanism of Destruction4Vecitis et al(2008)LaboratoryLaboratory-scale Reactorscale Reactor5Maximum Volume2 LDimensions10.1 cm 18.42 cm 18.42 cmRated Power250 WPiezo-electric Transducers 4Temperature ControlYesMaterialPolypropylene0.4 kWh for 4 h operation=5 cents$0.12/kWh=$0.18/galReactor Operation

4、Reactor Operation6ArgonAr INAr OUTBatch-modeSonication(240 min)Sample Collection every 30 minCoolant INCoolant OUTAgilent 6460 triple Quadrupole mass Spectrometer(LC/QqQMS)PFAS AnalysisAnions Dionex Integrion HPIC,Thermo Fisher ScientificPFAS Solution 700 kHzHalfHalf-lives of Individual PFAS lives o

5、f Individual PFAS Kalra et al.,Chem Eng J(2021)ksulfonatescarboxylatesCC Bond StrengthSteric Hindrance&Surface Activity klongchain kshortchainlong chainSurface activityhydrophobicityshort chainSurface activityhydrophobicityKinetics of PFAS Kinetics of PFAS SonolyticSonolyticDegradationDegradation8De

6、gradation rates are controlled by the availability of PFAS on/in the ultrasonic cavity PFOS(C8)PFOA(C7)PFBS(C4)PFBA(C3)Stoichiometric Defluorination Stoichiometric Defluorination 96:2 FTAB HFPO-DADe-F98%99%Ci2 mg/L23 mg/LCf0.2 mg/L0.2 mg/LKalra et al.,Chem Eng J(2021)Effect of SalinityEffect of Sali