摘要
以紫外杀菌灯(波长为254nm)为光源,研究了酸性红R在由蒙脱土KSF和H2O2组成的类Fenton体系中的光降解行为,研究了反应体系pH、H2O2浓度对偶氮染料酸性红R光催化降解的影响,分析了酸性红R的光降解动力学规律。结果表明:对于100mg/L的酸性红R,在pH为3.0、66mg/L的H2O2和质量浓度为1g/L的蒙脱土条件下,在UV/类Fenton体系可以获得较高的反应速率,经50min的光照,酸性红R的光降解率为87.2%;而在类Fenton体系中的光降解率只有56%左右,可见UV对类Fenton体系有明显的协同作用;酸性红R的光降解动力学规律符合Langmuir-Hinshelwood方程,反应速率常数为1.82mg/(L·min)。
Abstract： The photo-degradation behavior of acid red R in the UV-Fenton-like （montmorillonite KSF and H2O2 ） system was studied with UV light （2=254 nm） as the light source. Effects of pH and H2O2 dosage on photo- calytic degradation of acid red R were investigated, and the kinetics analyses of the photo-degradation reaction were al- so carried out. The results showed that the higher reaction rates were obtained in the UV-Fenton-like system under the condition of pH 3.0,66 mg/L Hz Oz and 1 g/L montmorillonite KSF. After 50 min of UV irradiation,the photo- degradation efficiency of acid red R was 87.2%,but only 56 % in the Fenton-like system, so it can be concluded that UV had obvious synergistic effect for Fenton-like system. The photo-degradation rate of acid red R was in accord with the Langmuir-Hinshelwood equation,the reaction rate constant was 1.82 mg/（L·min）.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2014年第8期49-52,58,共5页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.41261078
No.40861017)
江西省自然科学基金资助项目(No.20114BAB203029)
江西省教育厅科技资助项目(No.GJJ12374)
