Citrobacter sp. CK3对活性红KN-3B的脱色反应动力学研究  

Kinetics study on decolorization of Reactive Red KN-3B by Citrobacter sp. CK3

作　　者：赖正[1,2] 熊小京[1,2] 郑天凌[3] 林光辉[4] 张章堂 

机构地区：[1]厦门大学深圳研究院,深圳518057 [2]厦门大学环境与生态学院,厦门361005 [3]厦门大学生命科学学院,厦门361005 [4]清华大学全球变化研究院,北京100084 [5]台湾宜兰大学环境科学与工程系

出　　处：《环境工程学报》2012年第8期2892-2896,共5页Chinese Journal of Environmental Engineering

基　　金：深圳市科技计划项目深港创新应用研发专题资助(08Lh-04);福建省科技计划项目资助(2009Y0048)

摘　　要：采用脱色菌Citrobacter sp. CK3,以活性红KN-3B染料为处理对象,在厌氧批式反应条件下,系统考察了pH值,温度和染料浓度对脱色反应速度的影响;通过动力学模拟及反应过程中染料的UV-Vis扫描图分析,探讨了脱色反应机理。结果表明:Citrobacter sp. CK3对活性红KN-3B的脱色反应的适宜pH为7～9;脱色反应速度在温度为32℃时达到最大。染料初浓度从57 mg/L逐渐增大到458 mg/L时脱色率逐渐降低。脱色过程中染料的偶氮键发生断裂,脱色反应符合二级反应动力学。The kinetic modeling and mechanism with which Citrobacter sp. CK3 removed the textile dye, C.I. Reactive Red 180, from aqueous solution was investigated using different parameters, such as initial dye concentration,pH and temperature. In anaerobic batch experiments, the decolorization efficiency decreased with increase in initial dye concentration. The high decolorization rate was observed at pH of 7 -9 and temperature of 32C. The decolorization followed a second order kinetic model. The UV-Vis spectra analysis revealed that the decolorization process was azo bond cleaved reaction.

关 键 词：CITROBACTER sp. CK3 活性红R180 脱色反应 动力学模拟 

分 类 号：X703.1[环境科学与工程—环境工程]