辉光放电等离子体降解生物染料橙黄G

利用辉光放电等离子体技术降解橙黄G偶氮染料废水,借助紫外光谱分析了其降解过程,考察了多种因素对其降解效果的影响.结果表明,提高染料初始浓度和电解质浓度可提高橙黄G的降解率.改变溶液的初始pH值,橙黄G的降解率随溶液的初始pH值升高而增加.橙黄G降解60min后,无催化剂时,降解率达到71.68%;在催化剂Fe^2＋和Mn^2＋存在时降解率达到92.48%和89.69%,COD去除率为95.85%和63.44%;H2O2存在时,降解率达到78.91%.

Degradation of Aqueous Biological Dye Orange G by Using Glow Discharge Plasma

Degradation of azo dye wastewater （aqueous biological dye Orange G） was carried out by electrolysis with glow discharge plasma. The degradation process was observed by using ultraviolet （UV） absorption spectra at wavelength 477 nm. Various influencing factors such as the initial pH, the concentration of Orange G and the catalytic action of Fe^2＋ and Mn^2＋ were examined. The results showed that the degradation efficiency of Orange G could be increased considerably by increasing initial concentration of Orange G and electrolyte concentration. Increasing the initial pH of the solution accelerates the degradation of Orange G. In 60 minutes, the ratio of degradation was 71.68% without any catalyst. In the presence of Fe^2＋ and Mn^2＋, the ratios of degradation were 92.48% and 89.69%, respectively. Meanwhile, the chemical oxygen demand （COD） values were decreased by 95.85% and 63.44%, respectively. The ratio of degradation was 78.91% when H2O2 was added.