1. Laboratory of Chemical and Environmental Engineering, University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, EU (E-mail: jaume@lequia.udg.es; quim@lequia.udg.es; claudia@lequia.udg.es; marilos@lequia.udg.es; manel@lequia.udg.es)
2. Department of Aquatic Biogeochemistry, Centre for Advanced Studies in Blanes (CEAB – C.S.I.C.), Carrer a la Cala Sant Francesc, 14. E-17300, Blanes, Catalonia, EU (E-mail: puig@ceab.csic.es)
3. Catalan Water Agency, Provença, 204-208, E-08036 Barcelona, Catalonia, EU (E-mail: jsbou@gencat.net)