活性黑KN-B染料模拟废水电化学脱色  

Electrochemistrical decolorization of C.I.Reactive black KN-B simulated wastewater

作　　者：杨蕴哲[1] 

机构地区：[1]福建工程学院环境与设备工程系,福州350007

出　　处：《环境工程学报》2009年第9期1607-1610,共4页Chinese Journal of Environmental Engineering

基　　金：福建工程学院引进人才基金资助项目(GY-Z0856)

摘　　要：为进一步明确活性染料在可溶性阳极电化学体系中的脱色机理,以铝为牺牲阳极,不锈钢为阴极,在恒电流操作模式下,针对活性黑KN-B模拟废水,考察了电流密度、初始pH值、电解质种类及浓度、温度、染料浓度因素对染料脱色过程的影响。结果表明：（1）电流密度、电解液初始pH值、氯化钠电解质浓度、温度、染料浓度对染料溶液脱色效率影响显著,在一定实验条件下,染料溶液脱色率可达到88%;（2）在不同pH的范围内,活性黑KN-B表现的脱色机理不同,pH 4-9为混凝与阴极还原脱色共同作用;pH〈4和〉9则表现为阴极还原脱色为主;（3）氯化钠的加入在增强染料脱色的同时,也有助于芳环类物质的后续混凝去除。To further clarify the mechanism of decolorization of reactive dye in the electrochemical system with soluble anode, influencing factors on decolorization of C. I. Reactive black KN-B simulated wastewater, such as current density, initial pH, sorts and concentration of electrolyte, temperature, and concentration of the dye, were researched under galvanostatic model and using A1 as sacrificial anode and stainless steel as cathode. The experimental results show that ： （1） the decolorization of the dye is strongly affected by current density, initial pH, temperature, concentration of dye and NaCl, and the decolorizing efficiency of the dye simulated wastewater is 88% under certain experimental conditions; （2） the decolorizing mechanism of the dye is different in the different ranges of pH, coagulation and cathodic reduction filled the role of decolorization in the range of pH 4 - 9, and cathodic reduction predominates in the range of pH 〈 4 or 〉 9 ; （3） the addition of sodium chloride can enhance deeolorizing, and contribute to aromatic substances coagulation follow-up to removal.

关 键 词：活性染料 脱色 电凝聚 阴极还原 

分 类 号：X703.1[环境科学与工程—环境工程]