Dioxin Soil Contamination near Former Landfills
2021
Kudryavtseva, A. D. | Mir-Kadyrova, E. Ya | Kalinkevich, G. A. | Brodskii, E. S.
Dioxin contamination levels and profiles of soils in New Moscow area were studied to identify the potential sources of contamination at a distance of 300 to 1000 m from the former Salar’evo, Shcherbinka, Sosenki, and Malinki landfills. The potential sources are derived using principal component analysis and positive matrix factorization. The total contamination level near the landfills does not significantly differ from those of urban soils in the same area. The congener profiles correspond to a combination of several dioxin contamination sources, including atmospheric deposition, various thermal processes, and spill of polychlorinated biphenyl technical fluids. A higher relative contribution of vehicle exhaust is characteristic of urban soils. As for the soils near former landfills, the congener profiles are more variable as well as, consequently, sources of contamination.
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