UV/O_3降解水样中COD的动力学建模

Kinetics modeling for degradation of COD in water sample by UV/O_3

建立动力学模型可以对UV/O_3降解有机物的过程进行有效的分析和预测,帮助改进水处理工艺以提高有机物的降解效率和降低能源消耗。然而,已有的方法无法满足实际水样中未知有机物降解过程的建模需求。在化学反应机理的基础上,结合对有机物降解生成CO_2浓度演化规律的分析,建立了一种可预测未知有机物降解反应的数学模型。通过改变氧化消解的条件,从理论上检验了该模型的灵敏度;同时,实验采用了含有葡萄糖、尿素和邻苯二甲酸氢钾的混合溶液作为测试水样,考察了模型的准确性,实验值与预测值的趋势一致。

Kinetics modeling can be used to effectively analyze and predict the process of the degradation of organics using the UV/O3 technique. It can also be used to improve the removal rate and reduce power consumption; however,the methods of kinetics modeling that were reported previously cannot be applied when there are unknown organics in the sample solution. Based on the chemical reaction mechanism,a mathematic model that can predict the treatment of a water sample with unknown organic species was established by including the evolution of CO2. The sensitivity of the model was tested under a variety of digestion conditions. Meanwhile,a sample solution mixed with glucose,urea,and potassium acid phthalate was used to validate the accuracy of the model.The experimental and simulated results followed the same trend.