摘要
采用稳态极化等方法对二氧化铅电极阳极降解对硝基苯酚(PNP)的电极过程进行了研究。考察了电流密度、支持电解质种类、对硝基苯酚初始浓度和降解时间等因素对降解效果的影响。实验结果表明,二氧化铅电极能够对对硝基苯酚进行有效地降解。通过正交实验,得到较优工艺条件为阳极电流密度为20 mA·cm-2、电解质种类为0.1 mol·L-1NaCl、PNP初始浓度为400 mg·L-1、降解时间为4 h。采用紫外图谱扫描(UV)分析了电化学降解PNP的中间产物,初步探讨了降解机理及二氧化铅电极降解对硝基苯酚遵循一级反应动力学规律。
The electrode process during the anodic degradation of p-nitrophenol on PbO2 electrode was investi- gated by the cyclic voltammetry and stead-state polarization. The influences of the current density, the type of supporting electrolytes and the initial p-nitrophenol concentration and degradation time on the effect of electro- degradation were investigated. The result of experiments showed that the p-nitrophenol could be electro-degrad- ed by PbO2 electrode effectively. Through the orthogonal method, the optimum conditions were obtained as fol- lows： anodic current density 20 mA＂ cm-2; type of supporting electrolytes 0.1 tool＂ L-1 NaC1; initial p-nitrophenol concentration 400 mg. L^-1; degradation time 4 h. The degradation mechanism was preliminarily discussed by ana- lyzing the PNP degradation intermediates using ultraviolet spectrum scanner（UV）. In addition, the degradation of p-nitrophenol followed the first-order kinetics at PbO2 electrode.
出处
《苏州科技学院学报（工程技术版）》
CAS
2012年第2期1-4,共4页
Journal of Suzhou University of Science and Technology （Engineering and Technology）
基金
江苏省环境科学与工程重点实验室开放课题(Zd091204)
江苏省高校科研成果产业化推进项目(5HB2011-50)
苏州科技学院研究生科研创新计划项目(SKCX10S_032)
关键词
电催化氧化
二氧化铅电极
对硝基苯酚
electrochemical degradation
PbO2 electrode
p-nitrophenol （PNP）
