1. Department of Chemical Engineering; University of Barcelona; C/Martí i Franquès 1 08028 Barcelona Spain
2. Water and Soil Quality Research Group; IDAEA-CSIC; C/ Jordi Girona, 18-26 08034 Barcelona Spain
3. Department of Environmental Chemistry; IDAEA-CSIC; C/Jordi Girona 18-26 08034 Barcelona Spain
4. Catalan Institute for Water Research-ICRA, C/Emili Grahit, 101, Edifici H2O; Parc Científic i Tecnològic de la Universitat de Girona; E-17003 Girona Spain