以Pt/Ti为阳极电化学处理黄连素制药废水动力学研究

Kinetic Study of Electrochemical Treatment of Berberine Wastewater with Pt/Ti Anode

  • 摘要: 采用电化学氧化法处理黄连素制药废水,探讨了过程中黄连素的去除动力学,考察了阳极材料、偏压、初始pH及Cl-浓度等因素对废水中黄连素去除的影响。结果表明,黄连素在Pt/Ti等四种阳极上的电化学降解均符合假一级动力学;电化学生成的活性氯对黄连素的降解起重要作用,阳极偏压和初始Cl-浓度是影响黄连素降解速率的控制因素;在以Pt/Ti为阳极,阳极偏压为2.0~2.5 V,废水初始pH为5.0~9.0,Cl-浓度为0.10 mol/L条件下,电化学过程对黄连素降解动力学速率常数较高;黄连素易降解而生成有机酸等小分子化合物,其去除率达到90%以上。

     

    Abstract: Electrochemical process was applied to the treatment of berberine pharmaceutical wastewater. The degradation kinetics of berberine was studied, and the effects of anode, bias potential, initial pH and Cl- concentration on the berberine degradation were discussed. The results showed that the degradation of berberine on four anodes including Pt/Ti followed the pseudo-first order kinetics; electro-generated active chlorine played an important role on the degradation of berberine, anodic bias and initial Cl- concentrations were the control factors of berberine degradation; under the optimal conditions of bias potential of 2.0-2.5 V, initial pH of 5.0-9.0 and Cl- concentration of 0.10 mol/L, the pseudo-first order kinetic constant kept high. Berberine was easily degraded into organic acid or other small molecular compounds, and the removal efficiency of berberine reached above 90%.

     

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