电絮凝-1417.full

电絮凝-1417.fullElectrocoagulationfortheeffectiveremovalofpollutantsAdelaideDuraandCarmelB.BreslinDepartmentofChemistry,NationalUniversityofIrelandMaynooth,Maynooth,Co.Kildare,Ireland.Theexistingwastewatertreatmentsinvolvebiologicalandchemicalapproaches.Thebiologicaltreatmentsareeffective,butrequirelongtimes,largetreatmentfacilitiesandareexpensive.Thechemicalapproaches,whichinvolveaddingchemicalstoextractorprecipitatethepollutant,areveryeffectiveinremovingthetargetpollutant,buttheanionofthesaltaddedcancausesecondarypollutionandlargeamountsofsludge(1).Electrochemicaltechniquesare,inthiscase,promisingbecauseoftheirversatility,safety,selectivity,amenabilitytoautomationandenvironmentalcompatibility(2).Electrocoagulationappearstobeoneofthemosteffectiveapproachesandhasbeenproventoremoveawiderangeofpollutants,suchasdyes,heavymetals,COD,etc.,(1).Theprincipleisbasedontheelectrochemicaloxidationofametaltogenerateacontrolledamountofmetalcations;thesecationscanthenformacoagulantwiththepollutant,which