1. Quality Control Department, Athens Water Supply and Sewerage Company (EYDAP SA), Oropou
156, 11146 Galatsi, Athens, Greece
2. LCM—Laboratory of Catalysis
and Materials−Associate Laboratory LSRE/LCM, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465
Porto, Portugal