辉光放电等离子体降解染料直接蓝86

利用接触辉光放电反应器产生等离子体降解直接蓝86（DB）水溶液，考察了DB初始浓度、初始pH和Fe^2＋对DB降解率的影响．结果表明，当DB初始浓度为30．0mg／L，溶液pH为3．0时，放电90min DB降解率可达72．36％；加入10．0mg／LFe^2＋时，放电10min DB降解率可达69．20％．DB降解过程中，随反应时间的延长，溶液pH值逐渐降低，溶液电导率逐渐上升．降解90min后COD去除率为41．76％，加入10．0mg／LFe^2＋后10minCOD去除率达38．50％，表明Fe^2＋对DB降解有明显的催化作用．

Degradation of direct blue 86 in aqueous solution with contact glow discharge electrolysis

In this paper, degradation of direct blue 86 （DB） was carried out by contact glow discharge electrolysis （ % CG- DE） and the effect of initial concentration, initial pH and Fe^2＋ concentration were investigated. The results showed that the degradation rate of DB was 72.36% after 90 min CGDE treatment, when initial concentration of DB was 30.0 mg/L and the value of pH was 3. O. With 10.0 mg/L Fe^2＋ in presence of solution, the degradation rate was 69.20% after 10 min treatment. During CGDE treatment, the value of pH decreased and the conductivity of solution increased with increasing treatment time. COD removal rate was 41.76% after 90 min treatment without catalyst. With 10.0 mg/L Fe^2＋in presence of electrolyte solution, COD removal rate reached 38.50% after 10 min treatment. The results indicated that Fe^2＋ had catalytic effect on the degradation of DB in CGDE.