1. Institute of Geochemistry, Mineralogy and Mineral Resources, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic, Laboratories of Geological Institutes, Charles University, Albertov 6, 128 43, Prague 2, Czech Republic, Institute of Inorganic Chemistry, Academy of Science of the Czech Republic, 250 68 Řež, Czech Republic, and Centre for Waste Management (CWM), T. G. Masaryk Water Research Institute, Podbabská 30, 160 62, Praha 6, Czech Republic