活性染料废水电凝聚脱色能耗分析  

Analysis of decolorization and power consumption of Reactive dye simulated wastewater by electrocoagulation

作　　者：杨蕴哲[1] 

机构地区：[1]福建工程学院环境与设备工程系,福州350108

出　　处：《辽宁科技学院学报》2011年第3期13-16,10,共5页Journal of Liaoning Institute of Science and Technology

基　　金：福建省教育厅A类科技项目(JA10215)

摘　　要：文章在铝阳极和不锈钢阴极的电化学体系中,在恒电流模式下,考察了活性红M-3BE模拟废水脱色过程及能耗的影响因素。实验结果表明,电流密度、电解液初始pH值、氯化钠电解质浓度、温度、染料浓度对染料溶液脱色效率影响较大;电流密度、电解液初始pH值、氯化钠与硫酸钠电解质浓度、温度对脱色过程能耗影响显著。在一定实验条件下,染料溶液脱色率可达到98%,能耗117.75 kWh/(kg dye)。在不同pH的范围内,活性红M-3BE表现的脱色机理不同,pH 4～8为混凝与阴极还原脱色共同作用,pH小于4和大于9则表现为阴极还原脱色为主,且低pH下能耗较低。氯化钠既有助于提高染料废水的脱色效率,又有助于降低脱色过程中的能耗。To further clarify the mechanism of decolorization of reactive dye and power consumption in the electrochemical system with soluble anode, influence factors on decolorization of C. I. Reactive Red M -3BE simulated wastewater were researched under galvanostatic model and using A1 as anode and stainless steel as cathode. The experimental results have shown that the decolorization of the dyeis strongly affected by current density, initial pH, temperature, concentration of dye and NaCI, and power consumption strongly affected by current density, initial pH, temperature, concentration of Na2S04 and NaCI. Under certain experimental conditions, the decalorizing efficiency and power consumption of the dye simulated wastewater is 98% , 117.75 kWh/（ kg dye）, respectively. The decolorizing mechanism of the dye is different in the different range of pH, coagulation and cathodic reduction filled the role of decolorization in the range of pH 4～8, and cathodic reduction predominated in the range of pH 〈 4 or 〉 9. The power consumption is lower in pH 〈 4. The addition of sodium chloride can not only enhance decolorizing, but also be contributed to reduce energy consumption.

关 键 词：电化学 活性染料 脱色 能耗 

分 类 号：X703.1[环境科学与工程—环境工程]