辉光放电等离子体降解番红花红T染料废水  

DEGRADATION OF SAFRANINE T DYE WASTEWATER BY USING GLOW DISCHARGE PLASMA

作　　者：张敏[1] 高爱华[1] 郭乐慧 游伟[1] 陆镝莱[2] 成放 

机构地区：[1]西北大学物理学院 [2]西北大学化工学院,陕西西安710069

出　　处：《水处理技术》2014年第10期103-107,共5页Technology of Water Treatment

基　　金：陕西省教育厅专项科研基金项目(09Jk742);西北大学国家级大学生创新性试验计划项目(201210697025);西北大学本科教学工程项目(JX12022)

摘　　要：利用辉光放电等离子体(GDP)对阳离子染料番红花红T模拟废水进行降解。通过测量番红花红T染料废水处理前后在紫外可见区最大吸收波长554 nm的吸光度来计算降解效率,同时考察在降解过程中溶液的pH、电导率的变化。结果表明,初始质量浓度分别为50、100 mg/L的番红花红T水溶液在经过15 min后降解效率分别高达99.34%、98.99%,且降解过程符合准1级动力学特征。随着放电处理的进行,溶液的电导率增大、pH降低,说明在放电处理进行中产生了大量荷电离子及酸性物质。通过对3种不同情况下降解结果的比较(放电处理加Fe离子、仅放电处理和放电处理加Na2SO4),推测对番红花红T起主要降解作用的是羟基(·OH)自由基。Glow discharge plasma（GDP） was used to degrade cationic dye wastewater of Safranine T. The degradation rate was calculated by measuring the absorbance at the maximum wavelength 554 nm in the UV-visible range. The conductivity and pH of aqueous Safranine T solution in the degradation process were also recorded. The results showed that when the initial concentration of Safranine T was 50 and 100 mg/L, after the treatment, the degradation rate was 99.34% and 98.99%. The degradation of Safranine T followed pseudo-first order kinetics in glow discharge plasma. The increasing of solution conductivity and decreasing of pH indicated that a large number of charged ions and acidic substance was produced during the discharge process. Hydroxyl radical（·OH） may play a major role for the degradation of Safranine T in the discharge process by compared the results of three different situations（discharge treating with adding Fe ions, only discharge treating, and discharge treating with adding NaSO4）.

关 键 词：辉光放电 番红花红T 降解效率 羟基自由基 

分 类 号：X788[环境科学与工程—环境工程]