Detection and Selective Sorption of Copper Ions by a COF-Modified Melamine Sponge - Panagiota Bika; Nikolaos Ioannidis; Polychronis Tsipas; Stefanos Papagiannis; Maria-Anna Gatou; Evangelia A. Pavlatou; Andreas Germanos Karydas; Thomas Stergiopoulos; Panagiotis Dallas (ACS Omega)