Mobilisation of heavy metals by deicing salts in a roadside environment
2004 (English)In: Water Research, ISSN 0043-1354, E-ISSN 1879-2448, Vol. 38, no 3, 720-732 p.Article in journal (Refereed) Published
The seasonal variations of some selected heavy metals (Cd, Cu, Pb and Zn) and principal anions in soil solutions were monitored as a function of distance from the road at two field sites in Sweden. During the winter, the conductivity, concentrations of dissolved sodium and chloride increased dramatically due to the application of deicing agents (i.e. NaCl). Due to ion exchange, the pH decreased one unit in the soil solutions, whereas the concentrations of total organic carbon decreased due to coagulation and/or sorption to stationary solids. The heavy metal concentrations increased during the winter, but through different mechanisms. Cadmium concentrations in the aqueous phase increased as a response to ion exchange, possibly also enhanced by the formation of chloride complexes. Similarly, the concentrations of zinc increased, due to ion exchange, with calcium and protons. The mechanisms of mobilisation for copper and lead were not that clear probably due to association with coagulated or sorbed organic matter in combination with colloid dispersion.
Place, publisher, year, edition, pages
2004. Vol. 38, no 3, 720-732 p.
deicing, soil solution, ion exchange, chloride complexes, organic-matter, soil solution, contaminated soils, groundwater, contamination, capillary electrophoresis, lead activity, stream water, fulvic-acid, sandy soil, cadmium
Oceanography, Hydrology, Water Resources
IdentifiersURN: urn:nbn:se:kth:diva-23107DOI: 10.1016/j.watres.2003.11.006ISI: 000188364500026OAI: oai:DiVA.org:kth-23107DiVA: diva2:341805
QC 201005252010-08-102010-08-102012-02-10Bibliographically approved