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›› 2006, Vol. 6 ›› Issue (4): 566-570.

• 过程与工艺 • 上一篇    下一篇

Ti/SnO2+Sb2O3/b-PbO2阳极电化学氧化异噻唑啉酮

韩卫清,周刚,王连军,孙秀云,李建生   

  1. 南京理工大学环境科学与工程系
  • 出版日期:2006-08-20 发布日期:2006-08-20

Electrochemical Oxidation of Isothiazolin-ketone Using a Ti/SnO2+Sb2O3/b-PbO2 Anode

HAN Wei-qing,ZHOU Gang,WANG Lian-jun,SUN Xiu-yun,LI Jian-sheng   

  1. The Department of Environment Science and Technology of Nanjing University of Science and Technology
  • Online:2006-08-20 Published:2006-08-20

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摘要： 采用提拉法和电沉积法制作Ti/SnO2+Sb2O3/b-PbO2阳极，通过SEM扫描、XRD分析和极化曲线测定表征具有良好结构和催化性能. 利用该电极氧化异噻唑啉酮水溶液，研究运行参数(电化学氧化时间、电流密度和水溶液pH值)的变化对异噻唑啉酮和化学耗氧量(Chemical Oxygen Demand, CODcr)降解效果的影响，降解过程符合一级动力学方程. 在异噻唑啉酮水溶液初始浓度200 mg/L、电流密度15 mA/cm2、电化学氧化180 min时，异噻唑啉酮、CODcr去除率可分别达到98%和43%. 通过紫外光谱图分析了异噻唑啉酮氧化过程为先开环，再生成低分子有机酸，最后矿化为CO2和H2O.

关键词: 异噻唑啉酮, 电化学氧化, 钛基b-氧化铅阳极(Ti/SnO2+Sb2O3/b-PbO2), 化学耗氧量

Abstract: Ti/SnO2+Sb2O3/b-PbO2 electrode was prepared by coating and electro-deposition method. The structure and property of electrode were also analyzed by SEM, XRD and steady state polarization curve. In this study, electrochemical oxidation using a Ti/SnO2+Sb2O3/b-PbO2 anode was applied to treat an isothiazolin-ketone solution. The kinetics of isothiazolin-ketone degradation and chemical oxygen demand (CODcr) destruction was investigated, while the operating parameters affecting the mechanism were also studied. The parameters investigated included current density, electrochemical oxidation time and pH. 98% isothiazolin-ketone and 43% CODcr were removed at a current density of 15 mA/cm2, initial isothiazolin-ketone of 200 mg/L and oxidation time of 180 min. The intermediates of electrochemical oxidation were analyzed by UV spectrum. The heterocycle of the isothiazolin-ketone was firstly disconnected and oxidated into some organic acids, then the organic acids were oxidated into CO2 and H2O.

Key words: isothiazolin-ketone, electrochemical oxidation, Ti/SnO2+Sb2O3/b-PbO2 anode, CODcr