02107nas a2200265   4500000000100000000000100001008004100002653002200043653001900065653002100084653001800105653001400123100001300137700001300150700001700163700001600180700001500196700001400211245011900225856007100344300001400415490000800429520139000437020001401827       2011                            d10aContaminated land10aElectrokinetic10aLand remediation10aOn-site trial10aPlutonium1 aK. Agnew1 aA. Cundy1 aL. Hopkinson1 aI. Croudace1 aP. Warwick1 aP. Purdie00aElectrokinetic remediation of plutonium-contaminated nuclear site wastes: Results from a pilot-scale on-site trial  uhttp://www.sciencedirect.com/science/article/pii/S0304389410015967  a1405-14140 v1863 aThis paper examines the field-scale application of a novel low-energy electrokinetic technique for the remediation of plutonium-contaminatednuclearsite soils, using soil wastes from the Atomic Weapons Establishment (AWE) Aldermaston site, Berkshire, UK as a test medium. Soils and sediments with varying composition, contaminated with Pu through historical site operations, were electrokinetically treated at laboratory-scale with and without various soil pre-conditioning agents. Results from these bench-scaletrials were used to inform a larger on-siteremediationtrial, using an adapted containment pack with battery power supply. 2.4 m^3 (ca. 4 tonnes) of Pu-contaminated soil was treated for 60 days at a power consumption of 33 kW h/m^3, and then destructively sampled. Radiochemical data indicate mobilisation of Pu in the treated soil, and migration (probably as a negatively charged Pu\textendashcitrate complex) towards the anodic compartment of the treatment cell. Soil in the cathodic zone of the treatment unit was remediated to a level below free-release disposal thresholds (1.7 Bq/g, or 0.4 Bq/g above background activities). The data show the potential of this method as a low-cost, on-site tool for remediation of radioactively contaminated soils and wastes which can be operated remotely on working sites, with minimal disruption to site infrastructure or operations.  a0304-3894