Raheb Ibrahim, Manlla Mohammad Sameh
Department of Chemistry, Faculty of Science, Tishreen University, Latakia, Syria.
Heliyon. 2021 Jun 28;7(6):e07427. doi: 10.1016/j.heliyon.2021.e07427. eCollection 2021 Jun.
Syrian natural magnetite has been utilized for the removal of methylene blue from aqueous solutions by photo-Fenton reaction. Experiments were carried out to evaluate the kinetic and thermodynamic parameters. Pseudo-first order, pseudo-second-order models were used to analyze the kinetic data obtained at different initial MB concentrations and temperatures. The photo-Fenton degradation process of MB is better described by the pseudo-first-order model. The activation energy Ea = 16.89 and 18.02 kJ/mol for MB degradation at concentrations 40 and 80 mg/l respectively, and that suggesting the degradation reaction proceeded with a low energy barrier, the values obtained (ΔG∗, ΔS∗, and ΔH∗) indicate that the process is endothermic and spontaneous.
叙利亚天然磁铁矿已被用于通过光芬顿反应从水溶液中去除亚甲基蓝。进行了实验以评估动力学和热力学参数。采用伪一级、伪二级模型分析在不同初始亚甲基蓝浓度和温度下获得的动力学数据。亚甲基蓝的光芬顿降解过程用伪一级模型能更好地描述。在亚甲基蓝浓度分别为40和80mg/l时，降解的活化能Ea分别为16.89和18.02kJ/mol，这表明降解反应以低能垒进行，所获得的值（ΔG∗、ΔS∗和ΔH∗）表明该过程是吸热且自发的。
