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Geological Society, London, Engineering Geology Special Publications; 1998; v. 14; p. 197-204;
DOI: 10.1144/GSL.ENG.1998.014.01.23
© 1998 Geological Society of London

Section 5: Research on pollutant behaviour

Transport of dissolved creosote compounds through fractured clay: column and field experiments

K. Broholm1, P. J. Jørgensen2, A. B. Hansen3, B. Nilsson4, R. C. Sidle4, E. Arvin1 & J. Fredericia4

1 Institute of Environmental Science and Engineering, Technical University of Denmark, Building 115, DK-2800 Lyngby, Denmark
2 Danish Geotechnical Institute, Maglebjergvej 1 DK-2800 Lyngby, Denmark
3 National Environmental Research Institute, Frederiksborgvej 399, Postbox 358, DK-4000 Roskilde, Denmark
4 Danish and Greenland Geological Survey, Thoravej 8 DK-2400 Copenhagen NV, Denmark

Transport of selected creosote compounds and tracers in two column experiments and a field study in fractured clayey till are presented. Twenty-five organic compounds were used in the column experiments and 12 in the field experiment. This paper focuses on three organic compounds: phenol, naphthalene and dibenzofuran. One column was biologically inactive, and the other was biologically active with denitrifying conditions in the beginning and aerobic/denitrifying conditions later on in the experiment. The infiltration water at the field site was aerobic in the beginning and anaerobic (no oxygen, very little nitrate, and some sulphate) later. The results showed very rapid transport through clayey till of the tracers and the organic compounds. Despite the rapid transport through fractures, biodegradation may be an important process in fractured media at least for the easily degradable organic compounds.