Earthworm Uptake Routes and Rates of Ionic Zn and ZnO Nanoparticles at Realistic Concentrations, Traced Using Stable Isotope Labeling. - Laycock, Adam; Diez-Ortiz, Maria; Larner, Fiona; Dybowska, Agnieszka; Spurgeon, David; Valsami-Jones, Eugenia; Rehkämper, Mark; Svendsen, Claus (Environmental Science & Technology, 2016)