Ion Specific Exchange

Membranes inElectrochemical Water TreatmentKyle KrygerKyle Kryger

Jim Baygents, Ph.D.Jim Baygents, Ph.D.Associate Dean, College of EngineeringAssociate Dean, College of Engineering

University of ArizonaUniversity of Arizona Jim Farrell, Ph.D.Jim Farrell, Ph.D.

Professor, Department of Chemical andProfessor, Department of Chemical and Environmental Engineering, University of ArizonaEnvironmental Engineering, University of Arizona

OverviewOverview BackgroundBackground

What is electrochemical water treatment?What is electrochemical water treatment? Why are ion selective membranes Why are ion selective membranes

needed?needed? MethodsMethods ResultsResults Next stepsNext steps Conclusion & QuestionsConclusion & Questions

Electrochemical Water Electrochemical Water TreatmentTreatment

Electrochemical Cell

Feed Water

Ion Exchange Column

AnodeCathode

Electrochemical CellElectrochemical Cell

H+

H+

H+

H+

H+

H+

H+

H+

H+

H+

H+

H+

H+H

+

H+

H+

H+

H+

H+

OH-

OH-

OH-

OH-

OH-

OH-OH-

A+

A+

A+

A+

A+

A+

C-

C-

C-

C-

C-

C-

Creation of Creation of Acids / BasesAcids / Bases

Movement ofMovement ofIonsIons

MethodsMethods Selection of base membraneSelection of base membrane

Polystyrene/DivinylbenzenePolystyrene/Divinylbenzene EconomicsEconomics Mechanical StrengthMechanical Strength

FunctionalizationFunctionalization Chlorosulfonic AcidChlorosulfonic Acid Permanent ChargePermanent Charge

Image courtesy of Biotage

Image courtesy of Wikipedia

AchievementsAchievements Base MembraneBase Membrane

Chemical PreparationChemical Preparation 64% of pores filled64% of pores filled Established Electrical contactEstablished Electrical contact

across membrane.across membrane. FunctionalizationFunctionalization

Safe ProcedureSafe Procedure Positive ReactionPositive Reaction

Next StepsNext Steps Performance of Functionalized Performance of Functionalized

MembraneMembrane Diffusion of Ions / ICPDiffusion of Ions / ICP

Scaling up manufacturing ProcessScaling up manufacturing Process Chemical HandlingChemical Handling Large Scale ProductionLarge Scale Production

ImplementationImplementation ImpactImpact

Thank you for attending!Thank you for attending!Questions?Questions?