Abstract
As part of an investigation of the removal of road surface contaminants in runoff water, samples of road drainage water have been examined by a comprehensive speciation scheme involving size discrimination by filtration through Nuclepore filters, anodic stripping voltammetry both with and without UV irradiation, and equilibration with Chelex resin, with a view to understanding the chemical associations of Cd, Cu, Pb, Mn and Fe in the waters. Samples were taken to represent different stages of a storm event and changes in speciation are seen to reflect changes in the flow regime and pH of the drainage water system. Upon leaving the highway, the waters enter a small receiving stream in which the speciation characteristics of the water downstream of the outfall were found to be dominated by the input drainage waters.
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