电絮凝-Removal of Water Turbidity by the Electrocoagu

电絮凝-Removal of Water Turbidity by the ElectrocoagulationJResHealthSci,Vol.8,No.1,pp.18-24,2008RemovalofWaterTurbiditybytheElectrocoagulationMethodRahmaniAR.PhDDept.ofEnvironmentalHealthEngineering,CenterofHealthResearch,HamadanUniversityofMedicalSciences,Iran(Received5Nov2007;accepted22Mar2008)AbstractBackground:Electrocoagulationisatechniqueinvolvingtheelectrolyticadditionofcoagulatingmetalionsdirectlyfromsacrificialelectrodes.Theseionscoagulatewithturbidityagentsinthewater,inasimilarmannertotheadditionofcoagulatingchemicalssuchasalumandferricchloride,andal-lowtheeasierremovalofthepollutants.Purposeofthisstudywastoconductexperimentalinvestiga-tionofwaterturbidityremovalusingtheelectrocoagulationmethod.Methods:Removalofturbidityfromrawwaterinbatchsystemwasinvestigatedbydifferentvoltage(10,15,20,25,30V),electrodes(Al,FeandSt)andelectrolyzestime(0to40min.),electrodesdis-tance2cmandpH=7.5.Results:Theexperimentalresultsshowedthattheremovalefficiencydependsontheelectrolyzetime,typesofelectr