Akademik Veri Yönetim Sistemi
ACS OMEGA, cilt.10, sa.34, ss.39022-39033, 2025 (SCI-Expanded, Scopus)
A novel silica-based sorbent, silica-carbazole-formazan (Si-Carb-Formazan), was synthesized through in situ functionalization with a newly prepared carbazole formazan derivative to remove Cu(II) ions from aqueous solutions efficiently. The sorbent was characterized using techniques such as FTIR, SEM, TGA, and XPS, which revealed a porous structure with a high surface area and excellent thermal stability. Batch adsorption experiments analyzed the influence of various factors on the sorbent's performance, demonstrating its high efficiency. Optimal adsorption occurred at a pH of 6.0, with a maximum capacity of 34 mg/g achieved within 15 min using only 5.0 mg of the sorbent. The adsorption process adhered to the Langmuir isotherm model and followed pseudo-second-order kinetics. Also, thermodynamic analysis indicated that the process was exothermic under the studied conditions. The sorbent displayed high selectivity for Cu(II) ions over other metal ions and retained over 90% of its initial capacity after five regeneration cycles using 0.10 M HCl. These findings highlight the high efficiency and potential of Si-Carb-Formazan as a reusable and cost-effective material for the rapid removal of toxic Cu(II) ions from contaminated water.