作者：万玲, 洪军, 刘保锋, 苏趋
作者单位：中国地质大学环境学院, 湖北 武汉 430074
关键词：结晶紫;节能灯;柠檬酸钠;草酸钠
摘要：
利用固态零价铁取代传统液态铁离子催化剂,和双氧水发生类Fenton反应,并与低分子有机酸盐形成络合物,提高降解效率。构建节能灯Fe0/H2O2/有机酸盐曝气体系,探究不同pH、Fe0的加入量、H2O2的初始浓度、有机酸盐的初始浓度和温度及不同有机酸体系对结晶紫降解效果的影响,寻求在可溶态铁溶度较低的条件下的最佳适用条件。结果表明:在中性环境下,节能灯下Fe0/H2O2/有机酸盐曝气体系降解结晶紫溶液中,可溶态铁的浓度能控制在较低的范围内,且柠檬酸钠体系比草酸钠体系控制效果更好,在这种条件下,节能灯下Fe0/H2O2/有机酸盐(草酸钠/柠檬酸钠)曝气体系的最佳降解条件为:反应温度约为30 ℃,有机酸盐初始浓度为1 mmol/L,H2O2初始浓度分别为5.88 mmol/L和3.92 mmol/L,Fe0加入量为19 g和16 g。
Study on the treatment of crystal violet by Fe0/H2O2/organic acid salt aeration system under energy saving lamp
WAN Ling, HONG Jun, LIU Baofeng, SU Qu
School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
Abstract: Solid Fe0 was substituted for traditional liquid ion catalyst to react with H2O2 and then added with low molecular organic acid salt to generate a complex so as to increase degradation. A Fe0/H2O2/organic acid salt (sodium oxalate, sodium citrate) aeration system was created. The removal rate of crystal violet and the concentration of iron ions in different organic acid salt systems were compared. In addition, it discussed in this paper how the degradation was influenced at different pH values, Fe0 addition, H2O2 concentration, organic acid concentration and reaction temperature. The results show that, under the neutral environment, the concentration of iron ions in crystal violet solution degraded by the Fe0/H2O2/organic acid salt system can be controlled within a lower range, and the citrate system is more efficient in this regard compared with the sodium oxalate system. The optimum operating conditions of Fe0/H2O2/organic acid salt (sodium oxalate, sodium citrate) system were 1 mmol/L organic acid, 5.88 mmol/L and 3.92 mmol/L H2O2, 19 g and 16 g Fe0 at 30 ℃ at neutral pH.
Keywords: crystal violet;energy saving lamp;sodium citrate;Na2C2O4
2015, 41(10): 44-49 收稿日期: 2015-01-18;收到修改稿日期: 2015-03-21
基金项目:
作者简介: 万玲(1989-),女,湖北武汉市人,硕士研究生,专业方向为水污染控制技术。
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