1. Ph.D. Candidate, Dept. of Environmental Science, Laboratory of Applied Environmental Chemistry, Univ. of Kuopio, Patteristonkatu 1, FIN-50100 Mikkeli, Finland (corresponding author).
2. Ph.D. Candidate, Dept. of Environmental Science, Waste Management Group, Univ. of Kuopio, P.O. Box 1627, FIN-70211 Kuopio, Finland.
3. Head of Waste Management Group, Dept. of Environmental Science, Univ. of Kuopio, P.O. Box 1627, FIN-70211 Kuopio, Finland.