William Davison is Emeritus Professor of Environmental Chemistry at Lancaster Environment Centre, Lancaster University, UK, where he has previously served as Head of Department. His studies, complemented by research in environmental analytical chemistry, focus on the biogeochemistry of carbon, iron, manganese, sulphur and trace metals in natural waters. Professor Davison, with his colleague Hao Zhang, developed the techniques of diffusive equilibration in thin-films (DET) and diffusive gradients in thin-films (DGT) and pioneered their initial applications in waters, soils and sediments. He has...