ABSTRACT

BPA (Bisphenol-A) is an organic colorless crystalline synthetic compound with the chemical formula of (CH₃)–C–(C₆H₄-OH)₂. The chemical structure of BPA consists of two methyl functional groups which are connected by a bridge to the phenol rings. The purpose of this study is to investigate the treatability of containing BPA wastewater using by homogeneous (ZnSO₄ catalyst) and heterogeneous (ZnO catalyst) catalytic ozone processes (COPs). The BPA removals of ZnO catalyst COP method and ZnSO₄ catalyst COP methods were compared and using the ZnO catalyst COP process gave better results than the ZnSO₄ catalyst COP process. For the BPA removals, the experimental parameters including pH, catalysts dose, ozone dose, and reaction time parameters were optimized by changing one parameter at a time. As a result of 12.5 min of ZnSO₄ oxidation, 94.16% of BPA removal was achieved under the optimum conditions (pH 6.32, 1 mg/L ZnSO₄ dose, 2400 mg/L O₃ dose). However, under optimum conditions (pH 6.32, 50 mg/L ZnO dose, 2400 mg/L O₃ doze, 20 min reaction time), the BPA removals have been obtained as 98.52%. The second-order kinetic model has been found to be the most suitable model for both processes and the regression coefficients (R²) have been found as 0.999 and 0.9979 for ZnSO₄ and ZnO catalysts COPs, respectively. The reaction rate constants (k) have also been calculated as 0.0939 L.mg⁻¹.min⁻¹ and 0.0509 L.mg⁻¹.min⁻¹ for BPA in homogeneous and heterogeneous COPs, respectively.

摘要

BPA（双酚A）是一种有机无色结晶合成化合物，化学式为(CH ₃ )–C–(C ₆ H ₄ -OH) ₂。BPA 的化学结构由两个甲基官能团组成，它们通过桥连接到苯酚环上。本研究的目的是研究使用均相（ZnSO ₄催化剂）和多相（ZnO 催化剂）催化臭氧工艺 (COPs) 处理含 BPA 废水的可处理性。_{比较了 ZnO 催化剂 COP 方法和 ZnSO 4}催化剂 COP 方法的 BPA 去除率，使用 ZnO 催化剂 COP 工艺比 ZnSO _{4得到更好的结果}催化剂COP工艺。对于 BPA 去除，实验参数包括 pH、催化剂剂量、臭氧剂量和反应时间参数通过一次改变一个参数进行优化。由于 ZnSO ₄氧化 12.5 分钟，在最佳条件（pH 6.32、1 mg/L ZnSO ₄剂量、2400 mg/LO ₃剂量）下实现了 94.16% 的 BPA 去除。然而，在最佳条件下（pH 6.32、50 mg/L ZnO 剂量、2400 mg/LO ₃剂量、20 分钟反应时间），BPA 去除率为 98.52%。已发现二阶动力学模型是最适合这两个过程的模型，并且已发现 ZnSO _{4的回归系数 (R} ² ) 分别为 0.999 和 0.9979和ZnO催化剂COPs，分别。BPA 在均相和异相 COP 中的反应速率常数 (k) 也分别计算为 0.0939 L.mg ^-1 .min ^-1和 0.0509 L.mg ^-1 .min ^{-1 。}