1 National Technical University of Athens, School of Chemical Engineering, Unit of Environmental Science & Technology, Zographou Campus, 15773, Athens, Greece. Electronic address: konmoust@central.ntua.gr.
2 Technical University of Crete, School of Environmental Engineering, Design of Environmental Processes Laboratory, Akrotiri, 73100, Chania, Greece.
3 National Technical University of Athens, School of Civil Engineering, Department of Water Resources and Environmental Engineering, Zographou Campus, 15780, Athens, Greece.
4 Polytechnic of Bari, Department of Civil and Environmental Engineering, Via Edoardo Orabona 4, Quagliariello University Campus, 70125 Bari, Italy.