edited by Mira Petrovic, Catalan Institute for Water Research (ICRA), Girona and ICREA, Catalan Institute for Research and Advanced Studies, Barcelona, Spain, Damia Barcelo, IDAEA-CSIC, Department of Environmental Chemistry, Barcelona and Catalan Institute for Water Research (ICRA), Girona, Spain, Sandra Pérez, Water and Soil Quality Research Group, Department of Environmental Chemistry, IDAEA-CSIC, Barcelona, Spain