偶氮染料循环伏安行为和生物厌氧脱色相关性研究

对4种结构相似偶氮染料的循环伏安特性研究及其生物厌氧脱色速率实验,结果表明,所选结构相似染料的生物脱色速率最快的是酸性黄-Bis(E_r=-616.75 mV),速率为0.012 09 mol·(L·h)^-1,依次是酸性黄-11E_r=-593.25 mV,0.010 40mol·(L·h)^-1],酸性黄-4E_r=-513 mV,0.007 575 mol·(L·h)^-1],且脱色速率与其循环伏安图中的还原峰电位间存在线性关系.研究还表明,电化学方法在一定程度上可对生物体系发生生化反应进行部分模拟和预测.

Predicting Biodegradability from the Electrochemical Characteristic of Azo Dyes

Experiments were conducted to study some electrochemical factors affecting the bacterial reduction cleavage of four azo dyes.And a common mixed culture was used as test organism and the reduction of azo dyes Acid Yellow 4,11,17 and Acid Yellow Bis was studied.It was found that the azo dyes were reduced at different rates,which could be correlated with the reduction potential of the azo compounds in cyclic voltammetric experiments.Acid Yellow Bis(E_r=-616.75 mV) was reduced at the highest rate of 0.012 09mol·L·h^-1,Acid Yellow 11E_r=-593.25 mV at 0.01040(mol·L·h)^-1 and Acid Yellow 4(E_r=-513 mV at0.007 575mol·(L·h)^-1).It is showed that the reduction potential is a preliminary tool to predict the decolorization capacity of oxidative and reductive biocatalysts.