naa a22 4500 51075032X CHVBK 20180411083102.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11270-013-1710-2 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1710-2 Enhanced Transport and Transformation of Zerovalent Nanoiron in Clay Using Direct Electric Current [Elektronische Daten] [Helena Gomes, Celia Dias-Ferreira, Alexandra Ribeiro, Sibel Pamukcu] One of the major obstacles to zerovalent iron nanoparticles (nZVI) application in soil and groundwater remediation is the limited transport, especially in low-permeability soils. In this study, direct current (constant potential of 5.0V) was used to enhance polymer-coated nZVI mobility in different porous media, including a bed of glass beads and kaolin clay. The tests were conducted using a modified electrophoretic cell and with nZVI concentrations typical of field applications (4gL−1). Experimental results indicate that the use of direct current can enhance the transport of the polymer-modified nanoparticles when compared with natural diffusion in low permeability or surface neutral porous medium. The applied electric field appeared to enhance the oxidation-reduction potential, creating a synergistic effect of nZVI usage with electrokinetics. Aggregation of the nanoparticles, observed near the injection point, remained unresolved. Springer Science+Business Media Dordrecht, 2013 Zerovalent iron nanoparticles (nZVI) nationallicence Enhanced transport nationallicence Direct current nationallicence Electrokinetics nationallicence Electrochemical treatment nationallicence Gomes Helena Department of Civil and Environmental Engineering, Fritz Engineering Laboratory, Lehigh University, 13 E. Packer Avenue, 18015-4729, Bethlehem, PA, USA aut Dias-Ferreira Celia Instituto Politécnico de Coimbra, CERNAS - Research Center for Natural Resources, Environment and Society, Campus da Escola Superior Agrária de Coimbra, Bencanta, 3040-316, Coimbra, Portugal aut Ribeiro Alexandra CENSE, Departamento de Ciências e Engenharia do Ambiente, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal aut Pamukcu Sibel Department of Civil and Environmental Engineering, Fritz Engineering Laboratory, Lehigh University, 13 E. Packer Avenue, 18015-4729, Bethlehem, PA, USA aut Water, Air, & Soil Pollution Springer Netherlands 224/12(2013-12-01), 1-12 0049-6979 224:12<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1710-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1710-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gomes Helena Department of Civil and Environmental Engineering, Fritz Engineering Laboratory, Lehigh University, 13 E. Packer Avenue, 18015-4729, Bethlehem, PA, USA aut NATIONALLICENCE 700 1- Dias-Ferreira Celia Instituto Politécnico de Coimbra, CERNAS - Research Center for Natural Resources, Environment and Society, Campus da Escola Superior Agrária de Coimbra, Bencanta, 3040-316, Coimbra, Portugal aut NATIONALLICENCE 700 1- Ribeiro Alexandra CENSE, Departamento de Ciências e Engenharia do Ambiente, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal aut NATIONALLICENCE 700 1- Pamukcu Sibel Department of Civil and Environmental Engineering, Fritz Engineering Laboratory, Lehigh University, 13 E. Packer Avenue, 18015-4729, Bethlehem, PA, USA aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/12(2013-12-01), 1-12 0049-6979 224:12<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer