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(a) Time-dependent development of the solution concentration of Al when the cathode foils are placed in water (sample weight of foil 1: 1.1368 g; sample weight of foil 2: 1.1355 g); (b) Time-dependent development of the solution concentration of Al and the pH value for a sample of a mechanically shredded cathode fraction in contact with water (sample weight: 3.0053 g).
