title: Electrokinetic Treatment of Cr-, Cu-, and Zn-Contaminated Sediment: Cathode Modification.
abstract: Enhanced electrokinetic (EK) removal of Cr, Cu, and Zn from sediment by using original and modified integrated ion exchange (IIX™) cathodes was investigated. IIX cathode design and EK device process modifications were made to improve performance: separation of IIX cathode components (IIXS), combination of modified IIX cathode with pulsed electric field (IIXSP), and separation of IIX cathode components with addition of an anion exchange resin compartment (IIXA). After using the IIXSP, overall Cr, Cu, and Zn removal efficacies were significantly improved compared with the other treatments investigated. No improvements in overall Cr, Cu, and Zn removal efficacies were achieved by utilization of IIXA. Nevertheless, significant removal efficacies occurred at the anode region since distribution of the alkaline front was prevented. However, metal accumulation in the cathode region occurred. This was a consequence of metal cation complexation with Cl-released from the anion exchange resin that changed the direction of metal migration. Enhancing EK remediation of Cr-, Cu-, and Zn-contaminated sediment can be achieved by using a modified IIX cathode.
authors.affiliation: Faculty of Sciences, University of Novi Sad , Novi Sad, Serbia .
authors.forename: Ljiljana
authors.initials: L
authors.lastname: Rajić
authors.affiliation: Faculty of Sciences, University of Novi Sad , Novi Sad, Serbia .
authors.forename: Božo
authors.initials: B
authors.lastname: Dalmacija
authors.affiliation: Faculty of Sciences, University of Novi Sad , Novi Sad, Serbia .
authors.forename: Svetlana Ugarčina
authors.initials: SU
authors.lastname: Perović
authors.affiliation: Faculty of Sciences, University of Novi Sad , Novi Sad, Serbia .
authors.forename: Dejan
authors.initials: D
authors.lastname: Krčmar
authors.affiliation: Faculty of Sciences, University of Novi Sad , Novi Sad, Serbia .
authors.forename: Srđan
authors.initials: S
authors.lastname: Rončević
authors.affiliation: Faculty of Sciences, University of Novi Sad , Novi Sad, Serbia .
authors.forename: Dragana
authors.initials: D
authors.lastname: Tomašević
keywords: IIX cathode; electrokinetic; heavy metals; sediment