naa a22 4500 51075161X CHVBK 20180411083106.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1007/s11270-013-1636-8 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1636-8 Effects of Periodic Electric Potential and Electrolyte Recirculation on Electrochemical Remediation of Contaminant Mixtures in Clayey Soils [Elektronische Daten] [Claudio Cameselle, Krishna Reddy] This paper investigates the operational factors that affect an integrated electrochemical remediation (IECR) process for the degradation and removal of both organic and heavy metal contaminants in low permeability soils. IECR aims to degrade the organic contaminants through chemical oxidation process and at the same time remove the heavy metals through electromigration. Hydrogen peroxide is used as an oxidant which is transported into the soil by the electroosmotic flow. The natural iron in the soil acts as a catalyst for the decomposition of hydrogen peroxide in a Fenton-like process. Kaolin soil was used as model low permeability soil. Soil was polluted with phenanthrene and nickel at concentrations of 500mg/kg each. Experiments were carried out at a constant voltage gradient of 1VDC/cm using 10% H2O2 as a flushing solution at the anode. The use of periodic voltage gradient and the recirculation of the cathodic solution to the anode favored the electroosmotic flow and the contaminant removal. Phenanthrene was eliminated from the soil in an average value of 30%. Though electroosmotic flow was registered in all the experiments, negligible amount of phenanthrene was detected in the electrode solutions, confirming that the removal of phenanthrene is due to chemical oxidation. Nickel was solubilized and transported towards the cathode, but it was accumulated in the close vicinity of the cathode due to the high pH. Overall, this study showed that IECR has potential to remediate soils contaminated by both organic compounds and heavy metals. Springer Science+Business Media Dordrecht, 2013 Chemical oxidation nationallicence Contaminant mixtures nationallicence Electrokinetic remediation nationallicence Heavy metals nationallicence Organic contaminants nationallicence Soil nationallicence Cameselle Claudio Department of Chemical Engineering, University of Vigo, University Campus, Building Fundicion, 36310, Vigo, Spain aut Reddy Krishna Department of Civil and Materials Engineering, University of Illinois at Chicago, 842 West Taylor Street, 60607, Chicago, IL, USA aut Water, Air, & Soil Pollution Springer Netherlands 224/8(2013-08-01), 1-13 0049-6979 224:8<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1636-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1636-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cameselle Claudio Department of Chemical Engineering, University of Vigo, University Campus, Building Fundicion, 36310, Vigo, Spain aut NATIONALLICENCE 700 1- Reddy Krishna Department of Civil and Materials Engineering, University of Illinois at Chicago, 842 West Taylor Street, 60607, Chicago, IL, USA aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/8(2013-08-01), 1-13 0049-6979 224:8<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer