Utilization of Flotation Wastewater for Metal Xanthate Gel Synthesis and Its Role in Polyaniline-Based Supercapacitor Electrode Fabrication. - Garbev, Atanas; Petkucheva, Elitsa; Ivanova, Galia; Dimitrova, Mariela; Stoyanova, Antonia; Slavcheva, Evelina (Gels (2310-2861), 2025)