摘要
在恒电流模式下，采用无隔膜电解槽，同时以活性炭纤维（ACF）为阳极和阴极，研究了不同电流密度下蒽醌染料活性艳蓝KN—R的脱色效果和脱色机制．结果表明：0～0．1mA·cm^-2时，脱色是由于染料在ACF上的吸附，极化对吸附行为影响不大，脱色率在15％左右；0．2～0．6mA·cm^-2时，阳极电位达到该染料在ACF上的氧化电位（0．5V），阴极电位未达到其还原电位（-0．7V），脱色是由于阳极电氧化和阴极吸附，脱色率最高可达52％；0．7～1．0mA·cm^-2时，发生成对电解，即阳极电氧化和阴极电还原同时使染料脱色，脱色率最高可达83％．
Under galvanostatic mode, the decolorization behavior of Reactive Blue 19, one of anthraquinone dyes, was studied by using activated carbon fiber （ACF） as anode and cathode in paired electrolysis in an undivided cell. The relationship between decolorization mechanism and current density was investigated. In the range of 0 0.1 mA·cm^-2, decolorization resulted from adsorption of the dye on ACF, and adsorption behavior was scarcely affected by the current density. The color removal was about 15%. In the range of 0.2- 0.6 mA ·cm^-2, anodic electrooxidation and cathodic adsorption of the dye played important roles in decolorization. The maximum color removal was 52%. In the range of 0.7 1.0 mA ·cm^-2 , the paired electrolysis of the dye on anode and cathode filled the role of decolorization. The color removal might be up to 83%.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2006年第11期2714-2719,共6页
CIESC Journal
关键词
电流密度
成对电解
活性炭纤维
蒽醌染料
脱色
current density
paired electrolysis
activated carbon fiber
anthraquinone dye
decolorization
