1. Faculty of Earth Sciences, Nicolaus Copernicus University, 87-100 Toruń, Poland
2. Institute of Land Reclamation of the National Academy of Sciences of Belarus, Nekrasova, 39, 220040 Minsk, Belarus
3. Faculty of Geographical and Geological Sciences, Mickiewicz University, 61-712 Poznań, Poland
4. Department of Environmental Analysis, Pomeranian University, 76-200 Slupsk, Poland