Akademik Veri Yönetim Sistemi
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING, 2026 (SCI-Expanded, Scopus)
The dyestuffs in textile wastewater cause serious environmental problems when discharged to the receiving environment. Acid Black 194 (AB 194) is one of the most frequently used dyestuffs in the textile industry. Studies on the treatment of AB 194 are limited and treatment with ozone and hybrid ozone systems have not been encountered in the literature. In this study, the removal of wastewater containing AB 194 was investigated by O-3, O-3/UV, and photocatalytic oxidation (PCOP) methods. Commercial Al2O3 with < 50 nm diameter was used as a catalyst in PCOP. Process optimizations were performed using the Box Behnken Design (BBD). The R-2 values of the models obtained are 0.9992, 0.9992, and 0.9985 for O-3, O-3/UV, PCOP processes, respectively. The ozone dosage for all processes has been identified as the most effective parameter for dye removal. According to BBD results, the optimum conditions for the ozone process were determined as pH 6.99, ozone dose 799.16 mg/L, and time 14.28 min. For the O-3/UV process, the optimum values were identified as pH 5.08, ozone dose 660.38 mg/L, light intensity 13.65 W, and reaction time 9.87 min. Finally, the optimum conditions for PCOP were found to be pH 5.91, ozone dose 628.02 mg/L, catalyst dose 51.03 mg/L, light intensity 23.37 W, and time 10.24 min. While close dye removal efficiency values (around 99%) were obtained in all processes under optimum conditions, the highest dye removal efficiency was achieved in PCOP and the lowest in O-3 process when the three processes were operated under the same conditions.