Yan Yuntao, Mao Yanpeng, Dong Yong, Zhang Ke, Sun Xiaofei, Ma Chunyuan
School of Energy and Power Engineering, Shandong University 17923 Jingshi Road 250061 Jinan 250100 PR China
RSC Adv. 2019 Aug 21;9(45):26283-26290. doi: 10.1039/c9ra04709c. eCollection 2019 Aug 19.
We studied the exothermic laws of Fe/HO homogeneous quasi-Fenton degradation of -phenylenediamine in waste water, and analyzed the effects of [HO] and [Fe], initial reaction temperature, and other factors on the solution temperature elevation (Δ), temperature elevation duration (), and chemical oxygen demand degradation rate () during the degradation of the target pollutant. Our study found that [HO] is a major factor affecting Δ, while [Fe] and are the main factors influencing the exothermic reaction rate. For the conditions wherein [HO] is 0.2 mol L, [Fe] is 10 mmol L, pH = 7.8, initial reaction temperature is 30 °C, and reaction duration is 30 min, Δ of 200 mL of 0.04 mol L -phenylenediamine is 7.2 °C and is 93.45%. The exothermic reaction between the free radicals (·OH and ) and -phenylenediamine and the exothermic reaction due to auto-consumption of free radicals are the main reasons for the increased temperature of the solution.
我们研究了废水中对苯二胺的Fe/HO均相准芬顿降解的放热规律，并分析了[HO]和[Fe]、初始反应温度等因素对目标污染物降解过程中溶液温度升高（Δ）、升温持续时间（）和化学需氧量降解率（）的影响。我们的研究发现，[HO]是影响Δ的主要因素，而[Fe]和是影响放热反应速率的主要因素。对于[HO]为0.2 mol L、[Fe]为10 mmol L、pH = 7.8、初始反应温度为30°C且反应持续时间为30分钟的条件，200 mL 0.04 mol L对苯二胺的Δ为7.2°C，为93.45%。自由基（·OH和）与对苯二胺之间的放热反应以及自由基自消耗引起的放热反应是溶液温度升高的主要原因。
