Fe^2+强化UV/H2O2降解水中喹啉的研究  

Study on degradation of quinoline in water by UV/H2O2 enhanced by Fe^2+

作　　者：陈莉荣[1] 于楷伦 谷振超 CHEN Li-rong;YU Kai-lun;GU Zhen-chao(School of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古包头014010

出　　处：《应用化工》2020年第11期2808-2811,2815,共5页Applied Chemical Industry

基　　金：内蒙古自治区自然科学基金项目(2017MS(LH)0212);内蒙古科技大学创新基金项目(2017QDL-B15)。

摘　　要：采用UV/H2O2体系来降解水中的喹啉,研究了氧化剂投加量和溶液初始pH值对喹啉降解效果的影响,同时考察了Fe^2+强化UV/H2O2体系对喹啉的降解率和矿化率的影响。结果表明,当喹啉初始浓度(C0)=15 mg/L、紫外光照强度(I0)=8.96 mW/cm2、反应温度为25℃时,在pH=7.01、[H2O2]∶[QL]=40的条件下,反应60 min后,喹啉的去除率为41.11%,反应120 min后,TOC的去除率为32.89%。控制上述反应条件不变,向原反应体系中加入Fe^2+,当[Fe^2+]∶[H2O2]=1∶65时,喹啉和TOC的去除率分别提升至90.90%和65.07%。喹啉的降解过程符合一级动力学方程(R2≥0.960),Fe^2+强化前后,喹啉的降解速率常数(kobs)由0.0085 min-1增加至0.0638 min-1。采用每一对数减小级电能输入(EEo)指标对两种工艺的电能效率进行评估,结果表明,Fe^2+的加入显著减小了UV/H2O2体系的电能消耗,研究结果可为实际工程提供参考。UV/H 2O 2 system was used to degrade quinoline in water.The effects of oxidant dosage and initial pH value of solution on the degradation of quinoline were studied.At the same time,the degradation rate and mineral content of quinoline by Fe^2+enhanced UV/H 2O 2 system were investigated.The results show that when the initial concentration of quinoline is C 0=15 mg/L,the ultraviolet light intensity is I 0=8.96 mW/cm 2,and the reaction temperature is 25℃,under the conditions of pH=7.01,[H 2O 2]∶[QL]=40,after 60 min of reaction,the removal rate of quinoline was 41.11%,and after 120 min of reaction,the removal rate of TOC was 32.89%.Controlling the above reaction conditions remains unchanged,adding Fe^2+to the original reaction system.When[Fe^2+]∶[H 2O 2]=1∶65,the removal rates of quinoline and TOC are increased to 90.90%and 65.07%,respectively.The degradation process of quinoline conforms to the first-order kinetic equation(R 2≥0.960).The degradation rate constant k obs of quinoline increases from 0.0085 min-1 to 0.0638 min-1 before and after Fe^2+strengthening.The energy efficiency of the two processes was evaluated using each logarithmic reduction energy input(E Eo)index.The results show that the addition of Fe^2+significantly reduces the power consumption of the UV/H 2O 2 system.The research results can provide a reference for practical engineering.

关 键 词：喹啉 FE^2+ UV/H2O2 高级氧化 降解速率常数 

分 类 号：TQ032[化学工程] TQ034