Gomes, Helena I.Ferreira, CéliaRibeiro, Alexandra B.Pamukcu, Sibel2023-07-042023-07-042013http://hdl.handle.net/10400.2/14207One 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 5.0 V) 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 (4 g L−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.engZerovalent iron nanoparticles (nZVI)Enhanced transportDirect currentElectrokineticsElectrochemical treatmentjournal article10.1007/s11270-013-1710-2