紫外LED点光源降解亚甲基蓝的动力学研究  

Kinetic study of the degradation of methylene blue by UV-LED point light

作　　者：陈再东 解清杰[1] 滕辰亮 戴竞 CHEN Zaidong;XIE Qingjie;TENG Chenliang;DAI Jing(School of Environment and Safety Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学环境学院,江苏镇江212013

出　　处：《印染助剂》2018年第7期17-21,共5页Textile Auxiliaries

基　　金：西藏县域生活污水湿地处理技术研究(Z2013G01S25-3)

摘　　要：为了研究点光源下亚甲基蓝废水的降解效率,探究了UV-LED点光源光催化的处理方法。使用UV-LED点光源探究了在不同催化条件下Ti O2对亚甲基蓝的去除效果。结果发现,在反应时间为4 h、p H为11、催化剂用量为1 g/L、溶液初始质量浓度为5 mg/L时,亚甲基蓝的去除率达到73%。UV-LED点光源催化降解亚甲基蓝的反应速率常数k符合准一级反应动力学公式,计算出k=0.064 6e-0.02ρ00.024 9p H0.335 1(0.012M3-0.06M2+0.077 4M+0.034 3)。In order to study the degradation efficiency of methylene blue wastewater under the point light source, the photocatalytic treatment method of UV-LED point light source was explored. The UV-LED point light source was used to study the effect of Ti O2 on the removal of methylene blue under different catalytic conditions. The results showed that the removal rate of methylene blue could reach 73% when reaction time was 4 h, p H=11, the amount of catalyst was 1 g/L and the solution concentration was 5 mg/L. The reaction rate constant k of the photocatalytic reaction of methylene blue was consistent with the quasi-first order reaction kinetics formula. The formula was as follows： k=0.064 6 e-0.02ρ00.024 9 p H0.335 1（0.012 M3-0.06 M2＋0.077 4 M＋0.034 3）.

关 键 词：Langmuir-Hinshewood模型 点光源 一级反应动力学 

分 类 号：TQ420.6[化学工程] X791[环境科学与工程—环境工程]