辉光放电等离子体降解染料直接蓝86

摘要

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 Fe2 + 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. 0. With 10. 0 mg/L Fe2+ 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 Fe2+ in presence of e-lectrolyte solution,COD removal rate reached 38. 50% after 10 min treatment. The results indicated that Fe2* had catalytic effect on the degradation of DB in CGDE.%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Fe2对DB降解率的影响.结果表明,当DB初始浓度为30.0 mg/L,溶液pH为3.0时,放电90 min DB降解率可达72.36％；加入10.0 mg/L Fe2+时,放电10 min 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90 min后COD去除率为41.76％,加入10.0 mg/L Fe2+后10 min COD去除率达38.50％,表明Fe2+对DB降解有明显的催化作用.