Abstract: Fe2+ activated persulfate (PS) system is used to remove quinoline and a high degradation rate is achieved.Effects of PS dosage,Fe2+ dosage and initial pH on the degradation of quinoline in PS/Fe2+ system are studied.Taking the degradation rate of quinoline as an index,a single factor experiment with 3 factors and 3 levels is designed and carried out combining with Box-Behnken principle in response surface methodology (RSM),and a quadratic polynomial model is established to further obtain the optimal reaction conditions for quinoline degradation.The optimal reaction conditions are found as follows:the molar ratios of PS/quinoline and PS/Fe2+ are 9.8 and 1.90,respectively,and initial pH is 3.49,under which theoretical degradation efficiency of quinoline shall reach 93.7%.Meanwhile,corresponding verification experiment is conducted under the above reaction conditions,and results show high consistency with the predicted values,indicating the strong credibility of the model.It is found through further analysis on three-dimensional fluorescence spectrum (3D-EEM) of quinolone-containing wastewater before and after treatment that quinoline degrades to generate humic acids substances and the red shift of the fluorescence peak appears during degradation.It is speculated that intermediate substances consisted of carbonyl,carboxyl,hydroxyl,and amine groups may generate during the whole reaction.
赵玉珏, 刘芝宏, 周爱娟, 汪素芳, 赵博玮, 岳秀萍. 响应曲面法优化Fe2+活化过硫酸盐降解喹啉工艺研究[J]. 现代化工, 2021, 41(1): 143-148.
ZHAO Yu-jue, LIU Zhi-hong, ZHOU Ai-juan, WANG Su-fang, ZHAO Bo-wei, YUE Xiu-ping. Optimization of quinoline degradation in PS/Fe2+ system based on response surface methodology. Modern Chemical Industry, 2021, 41(1): 143-148.
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